83_FR_24639 83 FR 24536 - Self-Regulatory Organizations; The Options Clearing Corporation; Notice of No Objection To Advance Notice Filing Concerning The Options Clearing Corporation's Margin Methodology

83 FR 24536 - Self-Regulatory Organizations; The Options Clearing Corporation; Notice of No Objection To Advance Notice Filing Concerning The Options Clearing Corporation's Margin Methodology

SECURITIES AND EXCHANGE COMMISSION

Federal Register Volume 83, Issue 103 (May 29, 2018)

Page Range24536-24541
FR Document2018-11454

Federal Register, Volume 83 Issue 103 (Tuesday, May 29, 2018)
[Federal Register Volume 83, Number 103 (Tuesday, May 29, 2018)]
[Notices]
[Pages 24536-24541]
From the Federal Register Online  [www.thefederalregister.org]
[FR Doc No: 2018-11454]



[[Page 24536]]

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SECURITIES AND EXCHANGE COMMISSION

[Release No. 34-83305; File No. SR-OCC-2017-811]


Self-Regulatory Organizations; The Options Clearing Corporation; 
Notice of No Objection To Advance Notice Filing Concerning The Options 
Clearing Corporation's Margin Methodology

May 23, 2018.

I. Introduction

    On November 13, 2017, The Options Clearing Corporation (``OCC'') 
filed with the Securities and Exchange Commission (``Commission'') 
advance notice SR-OCC-2017-811 (``Advance Notice'') pursuant to Section 
806(e)(1) of the Payment, Clearing, and Settlement Supervision Act of 
2010 (``Payment Supervision Act'') \1\ and Rule 19b-4(n)(1)(i) under 
the Securities Exchange Act of 1934 (``Exchange Act'') \2\ to propose 
several enhancements to OCC's margin methodology, the System for 
Theoretical Analysis and Numerical Simulations (``STANS''), OCC's 
proprietary risk management system that calculates clearing member 
margin requirements.\3\ The proposed changes would modify OCC's margin 
methodology to: (1) Obtain daily price data for equity products 
(including daily corporate action-adjusted returns of equities where 
prices and thus returns of securities are adjusted for any dividends 
issued, stock splits, etc.) for use in the daily estimation of 
econometric model parameters; (2) enhance its econometric model for 
updating statistical parameters (e.g., parameters concerning 
correlations or volatility) for all risk factors that reflect the most 
recent data obtained; (3) improve the sensitivity and stability of 
correlation estimates across risk factors by using de-volatized \4\ 
returns (but using a 500 day look back period); and (4) improve OCC's 
methodology related to the treatment of defaulting securities \5\ that 
would result in stable and realistic risk estimates for such 
securities.\6\ The Advance Notice was published for comment in the 
Federal Register on December 27, 2017.\7\ On January 11, 2018, the 
Commission requested OCC provide it with additional information 
regarding the Advance Notice.\8\ OCC responded to this request for 
information on January 23, 2018.\9\ On March 22, 2018, the Commission 
determined that the Advance Notice raises complex issues because OCC 
proposes to make detailed, substantial, and numerous changes to its 
margin methodology.\10\ As such, the Commission extended review period 
of the Advance Notice until May 23, 2018.\11\ As of May 23, 2018, the 
Commission has received one comment letter on the proposal contained in 
the Advance Notice.\12\ This publication serves as notice of no 
objection to the Advance Notice.
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    \1\ 12 U.S.C. 5465(e)(1). The Financial Stability Oversight 
Council designated OCC a systemically important financial market 
utility (``SIFMU'') on July 18, 2012. See Financial Stability 
Oversight Council 2012 Annual Report, Appendix A, available at 
http://www.treasury.gov/initiatives/fsoc/Documents/2012%20Annual%20Report.pdf. Therefore, OCC is required to comply 
with the Payment Supervision Act and file advance notices with the 
Commission. See 12 U.S.C. 5465(e).
    \2\ 17 CFR 240.19b-4(n)(1)(i).
    \3\ See Notice infra note 7, at 82 FR 61355.
    \4\ De-volatization is a process of normalizing historical data 
with the associated volatility thus facilitating comparison between 
different sets of data.
    \5\ Within the context of OCC's margin system, securities that 
do not have enough historical data for calibration are classified as 
``defaulting securities.'' See Notice, 82 FR at 61355, note 15.
    \6\ See Notice infra note 7, at 82 FR 61354.
    \7\ Exchange Act Release No. 82371 (Dec. 20, 2017), 82 FR 61354 
(Dec. 27, 2017) (SR-OCC-2017-811) (``Notice''). On November 13, 
2017, OCC also filed a related proposed rule change (SR-OCC-2017-
022) with the Commission pursuant to Exchange Act Section 19(b)(1) 
and Rule 19b-4 thereunder, seeking approval of changes to its rules 
necessary to implement the proposal contained in the Advance Notice 
(``Proposed Rule Change''). 15 U.S.C. 78s(b)(1) and 17 CFR 240.19b-
4, respectively. The Proposed Rule Change was published in the 
Federal Register on December 4, 2017. Exchange Act Release No. 82161 
(Nov. 28, 2017), 82 FR 57306 (Dec. 4, 2017) (SR-OCC-2017-022).
    \8\ See Memorandum from Office of Clearance and Settlement, 
Division of Trading and Markets, dated January 12, 2018, available 
at https://www.sec.gov/comments/sr-occ-2017-811/occ2017811.htm.
    \9\ See Memorandum from Office of Clearance and Settlement, 
Division of Trading and Markets, dated March 6, 2018, available at 
https://www.sec.gov/comments/sr-occ-2017-811/occ2017811.htm.
    \10\ See Extension Notice, 82 FR at 13315.
    \11\ Id.
    \12\ See letter from Michael Kitlas, dated November 28, 2017, to 
Eduardo A. Aleman, Assistant Secretary, Commission, available at 
https://www.sec.gov/comments/sr-occ-2017-022/occ2017022.htm 
(``Kitlas Letter''). After reviewing the Kitlas Letter, the 
Commission believes that it is nonresponsive to the Advance Notice 
and therefore outside the scope of the proposal.
    Since the proposal contained in the Advance Notice was also 
filed as a proposed rule change, all public comments received on the 
proposal are considered regardless of whether the comments are 
submitted on the Proposed Rule Change or the Advance Notice.
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II. Background \13\
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    \13\ The description of the background of the proposal is 
substantially excerpted from the Notice. See Notice, 82 FR at 61355.
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OCC's Current Margin Methodology

    OCC's margin methodology, the System for Theoretical Analysis and 
Numerical Simulations (``STANS''), calculates clearing member margin 
requirements.\14\ STANS utilizes large-scale Monte Carlo simulations to 
forecast price and volatility movements in determining a clearing 
member's margin requirement.\15\ The STANS margin requirement is 
calculated at the portfolio level of clearing member accounts with 
positions in marginable securities and consists of an estimate of a 99% 
expected shortfall \16\ over a two-day time horizon and an add-on 
margin charge for model risk (the concentration/dependence stress test 
charge).\17\ The STANS methodology is used to measure the exposure of 
portfolios of options and futures cleared by OCC and cash instruments 
in margin collateral.\18\
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    \14\ See Exchange Act Release No. 53322 (Feb. 15, 2006), 71 FR 
9403 (Feb. 23, 2006) (File No. SR-OCC-2004-20).
    \15\ See OCC Rule 601; see also Notice, 82 FR at 61355.
    \16\ See Notice, 82 FR at 61355.
     The expected shortfall component is established as the 
estimated average of potential losses higher than the 99% value at 
risk threshold. See Notice, 82 FR at 61355, note 8.
    \17\ See Notice, 82 FR at 61355. A detailed description of the 
STANS methodology is available at http://optionsclearing.com/risk-management/margins/. See Notice, 82 FR at 61355, note 9.
    \18\ See Notice, 82 FR at 61355.
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    A ``risk factor'' within OCC's margin system may be defined as a 
product or attribute whose historical data are used to estimate and 
simulate the risk for an associated product.\19\ The majority of risk 
factors utilized in the STANS methodology are total returns on 
individual equity securities. Other risk factors considered include: 
Returns on equity indexes; returns on implied volatility risk factors 
that are a set of nine chosen volatility pivots per product; changes in 
foreign exchange rates; securities underlying equity-based products; 
and changes in model parameters that sufficiently capture the model 
dynamics from a larger set of data.\20\
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    \19\ Id.
    \20\ Id.
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    Under OCC's current margin methodology, OCC obtains monthly price 
data for most of its equity-based products from a third-party 
vendor.\21\ This data arrive around the second week of every month in 
arrears and require approximately four weeks for OCC to process prior 
to installing into OCC's margin system.\22\ As a result, correlations 
and statistical parameters for risk factors at any point in time 
represent stale data and therefore may not be representative of the 
most recent market data.\23\ In the absence of daily updates, OCC 
employs an approach

[[Page 24537]]

where one or more identified market proxies (or ``scale-factors'') are 
used to incorporate day-to-day market volatility across all associated 
asset classes throughout.\24\ The scale-factor approach, however, 
assumes a perfect correlation of the volatilities between the security 
and its scale-factor, which gives little room to capture the 
idiosyncratic risk of a given security and is different from the broad 
market risk represented by the scale-factor.\25\
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    \21\ Id.
    \22\ Id.
    \23\ Id.
    \24\ Id.
    \25\ Id.
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    In addition, OCC imposes a floor on volatility estimates for its 
equity-based products using a 500-day look back period.\26\ OCC 
believes that using monthly price data, coupled with the dependency of 
margins on scale-factors and the volatility floor can result in 
imprecise changes in margins charged to clearing members, specifically 
across periods of heavy volatility when the correlation between the 
risk factor and a scale-factor fluctuate.\27\
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    \26\ See Notice, 82 FR at 61355.
     In risk management, it is a common practice to establish a 
floor for volatility at a certain level in order to protect against 
procyclicality in the model. See Notice, 82 FR at 61355, note 14.
    \27\ See Notice, 82 FR at 61355.
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    OCC's current methodology for estimating covariance and 
correlations between risk factors relies on the same monthly data 
described above, resulting in a similar lag time between updates.\28\ 
In addition, correlation estimates are based off historical returns 
series, with estimates between a pair of risk factors being highly 
sensitive to the volatility of either risk factor in the chosen 
pair.\29\ Accordingly, OCC believes that the current approach results 
in potentially less stable correlation estimates that may not be 
representative of current market conditions.\30\
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    \28\ Id.
    \29\ Id.
    \30\ Id.
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    Finally, under OCC's existing margin methodology, theoretical price 
scenarios for ``defaulting securities'' \31\ are simulated using 
uncorrelated return scenarios with an average zero return and a pre-
specified volatility called ``default variance.'' \32\ The default 
variance is estimated as the average of the top 25 percent quantile of 
the conditional variances of all securities.\33\ As a result, OCC 
believes that these default estimates may be impacted by extremely 
illiquid securities with discontinuous data.\34\ In addition, OCC 
believes that the default variance (and the associated scale-factors 
used to scale up volatility) is also subject to sudden jumps across 
successive months because it is derived from monthly data updates, as 
opposed to daily updates, which are prone to wider fluctuations and are 
subject to adjustments using scale-factors.\35\
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    \31\ See supra note 5.
    \32\ See Notice, 82 FR at 61355.
    \33\ Id.
    \34\ Id.
    \35\ Id.
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III. Description of the Proposal in the Advance Notice \36\
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    \36\ The description of the proposal is substantially excerpted 
from the Notice. See Notice, 82 FR at 61356-61358.
     In addition to the proposed methodology changes described 
herein, OCC also would make some clarifying and clean-up changes, 
unrelated to the proposed changes described herein, to update its 
margin methodology to reflect existing practices for the daily 
calibration of seasonal and non-seasonal energy models and the 
removal of methodology language for certain products that are no 
longer cleared by OCC. See Notice, 82 FR at 61356, note 17.
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    The Advance Notice proposes changes to OCC's margin methodology, 
STANS. More specifically, OCC proposes to: (1) Obtain daily price data 
for equity products (including daily corporate action-adjusted returns 
of equities where price and thus returns of securities are adjusted for 
any dividends issued, stock splits, etc.) for use in the daily 
estimation of econometric model parameters; (2) enhance its econometric 
model for updating statistical parameters (e.g., parameters concerning 
correlations or volatility) for all risk factors that reflect the most 
recent data obtained; (3) improve the sensitivity and stability of 
correlation estimates across risk factors by using de-volatized \37\ 
returns (but using a 500 day look back period); and (4) improve OCC's 
methodology related to the treatment of defaulting securities \38\ that 
would result in stable and realistic risk estimates for such 
securities.
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    \37\ De-volatization is a process of normalizing historical data 
with the associated volatility thus facilitating comparison between 
different sets of data.
    \38\ See supra note 5.
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    As a general matter, OCC believes that introducing daily updates 
for price data would result in more accurate margin requirements that 
are based off of the most recent market data. OCC also believes that 
the other model enhancements would, among other things, improve OCC's 
approach to estimating covariance and correlations between risk factors 
in an effort to achieve more accurate and timely correlation 
estimations.\39\ OCC further represents that the proposed changes would 
improve OCC's methodology related to the treatment of defaulting 
securities by reducing the impact that illiquid securities with 
discontinuous data have on default variance estimates. Each of these 
proposals is discussed in more detail below.
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    \39\ OCC's covariance and correlation analytics estimate whether 
risk factors are positively or inversely related and to what extent 
any relationship exists.
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1. Daily Updates of Price Data

    OCC proposes to introduce daily updates for price data for equity 
products, including daily corporate action-adjusted returns of 
equities, Exchange Traded Funds (``ETFs''), Exchange Traded Notes 
(``ETNs'') and certain indexes.\40\ OCC believes that the proposed 
change would help ensure that OCC's margin methodology is reliant on 
data that is more representative of current market conditions, thereby 
resulting in more accurate and responsive margin requirements.\41\ In 
addition, OCC believes that the introduction of daily price updates 
would enable OCC's margin methodology to better capture both market and 
idiosyncratic risk by allowing for daily updates to the parameters 
associated with the econometric model (discussed below) that captures 
the risk associated with a particular product, and therefore help 
ensure that OCC's margin requirements are based on more current market 
conditions.\42\ As a result, OCC would also reduce its reliance on the 
use of scale-factors to incorporate day-to-day market volatility, which 
OCC believes give little room to capture the idiosyncratic risk of a 
given security and is different from the broad market risk represented 
by the scale-factor.\43\
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    \40\ See Notice, 82 FR at 61356.
    \41\ Id.
    \42\ Id.
    \43\ Id.
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2. Proposed Enhancements to the Econometric Model

    In addition to introducing daily updates for price and corporate 
action-adjusted returns data, OCC is proposing enhancements to its 
econometric model for calculating statistical parameters for all 
qualifying risk factors that reflect the most recent data obtained 
(e.g., OCC would be able to calculate parameters such as volatility and 
correlations on a daily basis using the new daily price data discussed 
above). More specifically, OCC proposes to enhance its econometric 
model by: (i) Introducing daily updates for statistical parameters; 
(ii) introducing features in its econometric model that are designed to 
take into account asymmetry in the model used to forecast volatility 
associated with a risk factor ; (iii) modifying the statistical 
distribution

[[Page 24538]]

used to model the returns of equity prices; (iv) introducing a second-
day forecast for volatility into the model to estimate the two-day 
scenario distributions for risk factors; and (v) imposing a floor on 
volatility estimates using a 10-year look back period. These proposed 
model enhancements are described in detail below.
i. Daily Updates for Statistical Parameters
    Under the proposal, the statistical parameters for the model would 
be updated on a daily basis using the new daily price data obtained by 
OCC from a reliable third-party (as described above).\44\ As a result, 
OCC would no longer need to rely on scale-factors to approximate day-
to-day market volatility for equity-based products.\45\ OCC believes 
that calibrating statistical parameters on a daily basis would allow 
OCC to calculate more accurate margin requirements that represent the 
most recent market data.\46\
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    \44\ See Notice, 82 FR at 61356. OCC notes that this change 
would apply to most risk factors with the exception of certain 
equity indexes, Treasury securities, and energy futures products, 
which are already updated on a daily basis. See Notice, 82 FR 61356, 
at note 18.
    \45\ See Notice, 82 FR at 61356.
    \46\ Id.
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ii. Proposed Enhancements To Capture Asymmetry in Conditional Variance
    The current approach for forecasting the conditional variance for a 
given risk factor does not consider the asymmetric volatility 
phenomenon observed in financial markets (also called the ``leverage 
effect'') where volatility is more accurate and timely and reactive to 
market downturns.\47\ Under the proposal, OCC would amend its 
econometric model to include new features (i.e., incorporating 
asymmetry into its forecast volatility) designed to allow the 
conditional volatility forecast to be more accurate and timely to 
market downturns and thereby capture the most significant dynamics of 
the relationship between price and volatility observed in financial 
markets.\48\ OCC believes the proposed enhancement would result in more 
accurate and responsive margin requirements, particularly in market 
downturns.\49\
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    \47\ See Notice, 82 FR at 61357.
    \48\ Id.
    \49\ Id.
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iii. Proposed Change in Statistical Distribution
    OCC also proposes to change the statistical distribution used to 
model the returns of equity prices. OCC's current methodology uses a 
fat tailed distribution \50\ (the Student's t-distribution) to model 
returns; \51\ however, price scenarios generated using very large log-
return scenarios (positive) that follow this distribution can approach 
infinity and could potentially result in excessively large price jumps, 
a known limitation of this distribution.\52\ Under the proposal, OCC 
would adopt a more defined distribution (Standardized Normal Reciprocal 
Inverse Gaussian or NRIG) for modeling returns, which OCC believes 
would more appropriately simulate future returns based on the 
historical price data for the products in question and allows for more 
appropriate modeling of fat tails.\53\ As a result, OCC believes that 
the proposed change would lead to more consistent treatment of log 
returns both on the upside as well as downside of the distribution.\54\
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    \50\ A data set with a ``fat tail'' is one in which extreme 
price returns have a higher probability of occurrence than would be 
the case in a normal distribution. See Notice, 82 FR at 61357, note 
21.
    \51\ See Notice, 82 FR at 61357.
    \52\ Id.
    \53\ Id.
    \54\ Id.
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iv. Second Day Volatility Forecast
    OCC further proposes to introduce a second-day forecast for 
volatility into the econometric model to estimate the two-day scenario 
distributions for risk factors.\55\ Under the current methodology, OCC 
typically uses a two-day horizon to determine its risk exposure to a 
given portfolio.\56\ This is done by simulating 10,000 theoretical 
price scenarios for the two-day horizon using a one-day forecast 
conditional variance; the value at risk and expected shortfall 
components of the margin requirement are then determined from the 
simulated profit/loss distributions.\57\ These one-day and two-day 
returns scenarios are both simulated using the one-day forecast 
conditional variance estimate.\58\ OCC believes that this could lead to 
a risk factor's coverage differing substantially on volatile trading 
days.\59\ As a result, OCC proposes to introduce a second-day forecast 
variance for all equity-based risk factors.\60\ The second-day 
conditional variance forecast would be estimated for each of the 10,000 
Monte Carlo returns scenarios, resulting in more accurately estimated 
two-day scenario distributions, and therefore more accurate and 
responsive margin requirements.\61\
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    \55\ Id. This proposed change would not apply to STANS implied 
volatility scenario risk factors. For those risk factors, OCC's 
existing methodology would continue to apply. See Notice, 82 FR at 
61357, note 23.
    \56\ See Notice, 82 FR at 61357.
    \57\ Id.
    \58\ Id.
    \59\ Id.
    \60\ Id.
    \61\ Id.
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v. Anti-Procyclical Floor for Volatility Estimates
    In addition, OCC proposes to modify its floor for volatility 
estimates. OCC currently imposes a floor on volatility estimates for 
its equity-based products using a 500-day look back period.\62\ Under 
the proposal, OCC would extend this look back period to 10 years (2520 
days) in the enhanced model and apply this floor to volatility 
estimates for other products (excluding implied volatility risk factor 
scenarios).\63\ OCC believes that using a longer 10-year look back 
period will help ensure that OCC captures sufficient historical events/
market shocks in the calculation of its anti-procyclical floor.\64\
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    \62\ Id.
    \63\ Id.
    \64\ Id.
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3. Proposed Enhancements to Correlation Estimates

    As described above, OCC's current methodology for estimating 
covariance and correlations between risk factors relies on the same 
monthly price data feeding the econometric model, resulting in a 
similar lag time between updates.\65\ In addition, correlation 
estimates are based off historical returns series, with estimates 
between a pair of risk factors being highly sensitive to the volatility 
of either risk factor in the chosen pair.\66\ The current approach 
therefore results in correlation estimates being sensitive to volatile 
historical data.\67\
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    \65\ Id.
    \66\ Id.
    \67\ Id.
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    In order to address these limitations, OCC proposes to enhance its 
methodology for calculating correlation estimates by moving to a daily 
process for updating correlations (with a minimum of one week's lag) to 
help ensure clearing member account margins are more current and thus 
more accurate.\68\ Moreover, OCC proposes to enhance its approach to 
modeling correlation estimates by de-volatizing \69\ the returns series 
to estimate the correlations.\70\ Under the proposed approach, OCC 
would first consider the returns excess of the mean (i.e., the average 
estimated from historical data sample) and then further scale them by 
the corresponding estimated conditional

[[Page 24539]]

variances.\71\ OCC believes that using de-volatized returns would lead 
to normalizing returns across a variety of asset classes and make the 
correlation estimator less sensitive to sudden market jumps and 
therefore more stable.\72\
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    \68\ Id.
    \69\ Id.
    \70\ Id.
    \71\ Id.
    \72\ Id.
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4. Defaulting Securities Methodology

    Under the proposal, OCC would enhance its methodology for 
estimating the defaulting variance in its model.\73\ OCC's margin 
system is dependent on market data to determine clearing member margin 
requirements.\74\ Securities that do not have enough historical data 
are classified as ``defaulting securities'' within OCC systems.\75\ As 
noted above, within current STANS systems, the theoretical price 
scenarios for defaulting securities are simulated using uncorrelated 
return scenarios with a zero mean and a default variance, with the 
default variance being estimated as the average of the top 25 percent 
quantile of the conditional variances of all securities.\76\ As a 
result, these default estimates may be impacted by extremely illiquid 
securities with discontinuous data.\77\ In addition, the default 
variance (and the associated scale-factors used to scale up volatility) 
is also subject to sudden jumps across volatile months.\78\ To mitigate 
these concerns, OCC proposes to: (i) Use only optionable equity 
securities to estimate the defaulting variance; (ii) use a shorter time 
series to enable calibration of the model for all securities; and (iii) 
simulate default correlations with the driver Russell 2000 index 
(``RUT'').\79\
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    \73\ Id.
    \74\ See Notice, 82 FR at 61357-61358.
    \75\ See Notice, 82 FR at 61358.
    \76\ Id.
    \77\ Id.
    \78\ Id.
    \79\ Id.
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i. Proposed Modifications to Securities and Quantile Used in Estimation
    Under the proposal, only optionable equity securities, which are 
typically more liquid, would be considered while estimating the default 
variance.\80\ This limitation would eliminate from the estimation 
almost all illiquid securities with discontinuous data that could 
contribute to high conditional variance estimates and thus a high 
default variance.\81\ In addition, OCC proposes to estimate the default 
variance as the lowest estimate of the top 10% of the floored 
conditional variance across the risk factors.\82\ OCC believes that 
this change in methodology would help ensure that while the estimate is 
aggressive it is also robust to the presence of outliers caused by a 
few extremely volatile securities that influence the location parameter 
of a distribution.\83\ Moreover, as a consequence of the daily updates 
described above, the default variances would change daily and there 
would be no scale-factor to amplify the effect of the variance on risk 
factor coverage.\84\
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    \80\ Id.
    \81\ Id.
    \82\ Id.
    \83\ Id.
    \84\ Id.
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ii. Proposed Change in Time Series
    Under the proposal, OCC would use a shorter time series to enable 
calibration of the model for all securities.\85\ Currently, OCC does 
not calibrate parameters for defaulting securities that have historical 
data of less than two years.\86\ OCC is proposing to shorten this time 
period to approximately 6 months (180 days) to enable calibration of 
the model for all securities within OCC systems.\87\ OCC believes that 
this shorter time series is sufficient to produce stable calibrated 
parameters.\88\
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    \85\ Id.
    \86\ Id.
    \87\ Id.
    \88\ Id.
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iii. Proposed Default Correlation
    Under the proposal, returns scenarios for defaulting securities 
\89\ would be simulated using a default correlation with the driver 
RUT.\90\ The default correlation of the RUT index is roughly equal to 
the median of all positively correlated securities with the index.\91\ 
Since 90% of the risk factors in OCC systems correlate positively to 
the RUT index, OCC would only consider those risk factors to determine 
the median.\92\ OCC believes that the median of the correlation 
distribution has been steady over a number of simulations and is 
therefore proposing that it replace the current methodology of 
simulating uncorrelated scenarios, which OCC believes is not a 
realistic approach.\93\
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    \89\ See supra note 5.
    \90\ See Notice, 82 FR at 61358. OCC notes that, in certain 
limited circumstances where there are reasonable grounds backed by 
the existing return history to support an alternative approach in 
which the returns are strongly correlated with those of an existing 
risk factor (a ``proxy'') with a full price history, OCC's margin 
methodology allows its Financial Risk Management staff to construct 
a ``conditional'' simulation to override any default treatment that 
would have otherwise been applied to the defaulting security. See 
Notice, 82 FR at 61358, note 26.
    \91\ See Notice, 82 FR at 61358.
    \92\ Id.
    \93\ Id.
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IV. Discussion and Commission Findings

    Although the Act does not specify a standard of review for an 
advance notice, the stated purpose of the Act is instructive: To 
mitigate systemic risk in the financial system and promote financial 
stability by, among other things, promoting uniform risk management 
standards for SIFMUs and strengthening the liquidity of SIFMUs.\94\
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    \94\ See 12 U.S.C. 5461(b).
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    Section 805(a)(2) of the Act \95\ authorizes the Commission to 
prescribe regulations containing risk-management standards for the 
payment, clearing, and settlement activities of designated clearing 
entities engaged in designated activities for which the Commission is 
the supervisory agency. Section 805(b) of the Act \96\ provides the 
following objectives and principles for the Commission's risk-
management standards prescribed under Section 805(a):
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    \95\ 12 U.S.C. 5464(a)(2).
    \96\ 12 U.S.C. 5464(b).
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     To promote robust risk management;
     to promote safety and soundness;
     to reduce systemic risks; and
     to support the stability of the broader financial system.
    Section 805(c) provides, in addition, that the Commission's risk-
management standards may address such areas as risk-management and 
default policies and procedures, among others areas.\97\
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    \97\ 12 U.S.C. 5464(c).
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    The Commission has adopted risk-management standards under Section 
805(a)(2) of the Act and the Exchange Act (the ``Clearing Agency 
Rules'').\98\ The Clearing Agency Rules require, among other things, 
each covered clearing agency to establish, implement, maintain, and 
enforce written policies and procedures that are reasonably designed to 
meet certain minimum requirements for operations and risk-management 
practices on an ongoing

[[Page 24540]]

basis.\99\ As such, it is appropriate for the Commission to review 
advance notices for consistency with the objectives and principles for 
risk-management standards described in the Clearing Agency Rules.
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    \98\ 17 CFR 240.17Ad-22. See Securities Exchange Act Release No. 
68080 (October 22, 2012), 77 FR 66220 (November 2, 2012) (S7-08-11). 
See also Securities Exchange Act Release No. 78961 (September 28, 
2016), 81 FR 70786 (October 13, 2016) (S7-03-14) (``Covered Clearing 
Agency Standards''). The Commission established an effective date of 
December 12, 2016, and a compliance date of April 11, 2017, for the 
Covered Clearing Agency Standards. On March 4, 2017, the Commission 
granted covered clearing agencies a temporary exemption from 
compliance with Rule 17Ad-22(e)(3)(ii) and certain requirements in 
Rules 17Ad-22(e)(15)(i) and (ii) until December 31, 2017, subject to 
certain conditions. OCC is a ``covered clearing agency'' as defined 
in Rule 17Ad-22(a)(5).
    \99\ 17 CFR 240.17Ad-22.
---------------------------------------------------------------------------

A. Consistency With Section 805(b) of the Act

    The Commission believes that the proposal contained in OCC's 
Advance Notice is consistent with the stated objectives and principles 
of Section 805(b) of the Act. Specifically, as discussed below, the 
Commission believes that the changes proposed in the Advance Notice are 
consistent with promoting robust risk management in the area of credit 
risk and promoting safety and soundness, which in turn, would help 
reduce systemic risks and support the stability of the broader 
financial system.\100\
---------------------------------------------------------------------------

    \100\ 12 U.S.C. 5464(b).
---------------------------------------------------------------------------

    The Commission believes that the proposed changes promote robust 
risk management by enhancing OCC's margin methodology for the reasons 
set forth below.
    First, as noted above, the STANS methodology is used to measure the 
exposure of portfolios of options and futures cleared by OCC and cash 
instruments in margin collateral on behalf of its clearing members, 
which allows OCC to calculate its clearing members' margin 
requirements. Currently, STANS makes these calculation based on monthly 
price data obtained from a third-party vendor. To make the calculations 
more accurate and representative of recent market data, OCC proposes to 
amend its margin methodology to require the use of daily updates for 
equity price data instead of monthly updates, thereby reducing OCC's 
reliance on scale-factors.\101\ Accordingly, the Commission believes 
that changing to daily price data updates would result in more accurate 
and timely estimations of OCC's clearing members' margin requirements.
---------------------------------------------------------------------------

    \101\ See supra note 40.
---------------------------------------------------------------------------

    Second, the proposal discussed above to amend OCC's margin 
methodology to require the use of daily updates for price data would 
allow for updates to the margin model's statistical parameters on a 
daily, instead of monthly, basis.\102\ Similarly, the proposal would 
also amend STANS to introduce other features that would improve the 
accuracy of its models and, consequently, produce risk exposure and 
margin requirement calculations that better reflect current market 
conditions. For example, the proposal would: (i) Amend STANS to account 
for the asymmetric volatility phenomenon observed in financial markets 
and allow for conditional volatility forecast to be more accurate and 
timely to market downturns;\103\ (ii) amend the statistical 
distribution for modeling equity price returns to more appropriately 
model fat tails and, consequently, more accurately model returns; (iii) 
introduce a second-day volatility forecast into the model to provide 
for more accurate and timely estimations of its two-day scenario 
distributions then currently provided by its one-day forecast variance; 
and (iv) amend STANS to impose a volatility floor using a 10-year look 
back period to reduce procyclicality in the margin model by capturing 
sufficient market events in its calculations. Accordingly, the 
Commission believes that the introduction of enhancements to improve 
the accuracy of the STANS margin models would enable OCC to more 
effectively calculate clearing members' margin requirements.
---------------------------------------------------------------------------

    \102\ See supra note 40.
    \103\ See Notice, 82 FR at 61357.
---------------------------------------------------------------------------

    Third, as described earlier, OCC proposes to enhance its approach 
to model correlation estimates by moving to a daily process for 
updating correlations and by de-volatizing the return series to 
estimate the correlations. This change is intended to lead to 
normalized returns across a variety of asset classes and make the 
correlation estimator less sensitive to sudden market jumps and 
therefore more stable. Accordingly, the Commission believes that 
updating the correlations daily and de-volatizing the return series to 
reduce the estimator's sensitivity to market jumps promotes more 
accurate and robust models within the STANS methodology.
    Finally, to enhance its methodology for estimating the defaulting 
securities in its model, OCC proposes to: (i) Modify the method for 
estimating the default variance to include only optionable equity 
securities; (ii) use a shorter time series of six months instead of two 
years to enable calibration of the model for all securities within OCC 
systems; and (iii) simulate return scenarios for defaulting securities 
assuming a default correlation with the driver RUT. Accordingly, the 
Commission believes these changes will mitigate the effect that 
extremely illiquid securities with discontinuous data can have on OCC's 
default estimates, while further decreasing the degree to which the 
default variance is subject to sudden jumps across volatile months.
    Taken together, the Commission believes that these proposals would 
improve the accuracy of OCC's credit exposure calculations and, 
consequently, OCC's calculations of its clearing members' margin 
requirements. Therefore, the Commission believes the changes proposed 
in the Advance Notice would promote robust risk management, consistent 
with Section 805(b) of the Act.\104\
---------------------------------------------------------------------------

    \104\ 12 U.S.C. 5464(b).
---------------------------------------------------------------------------

    The Commission further believes that the proposed changes would 
help promote safety and soundness, reduce systemic risk and support the 
stability of the broader financial system. As described above, the 
proposed changes are designed to better limit OCC's credit exposure to 
the clearing members in the event of a clearing member default. More 
specifically, the daily updates of the pricing data, the enhancements 
to the econometric model, and the enhancements to the correlation 
estimates promote more accurate and stable model measurements that have 
less volatility. Moreover, the enhancements to the defaulting 
securities methodology will decrease the manner in which the default 
estimates are affected by illiquid securities and reducing the amount 
to which the default variance is subject to sudden jumps.
    By better limiting credit exposure to its clearing members, OCC's 
proposed changes are designed to help ensure that, in the event of a 
clearing member default, OCC's operations would not be disrupted and 
that its SIFMU functions would therefore be able to continue in a safe 
and sound manner. Furthermore, the ongoing safe and sound functioning 
of OCC via an enhanced ability to determine margin requirements should 
help ensure that non-defaulting clearing members would not be exposed 
to losses that they cannot anticipate or control. As such, the 
Commission finds that the proposed changes are consistent with the 
promotion of safety and soundness, which in turn, would reduce systemic 
risks and support the stability of the broader financial system, 
consistent with Section 805(b) of the Act.\105\
---------------------------------------------------------------------------

    \105\ Id.
---------------------------------------------------------------------------

    Therefore, the Commission believes the changes proposed in the 
Advance Notice are consistent with Section 805(b) of the Act.\106\
---------------------------------------------------------------------------

    \106\ Id.
---------------------------------------------------------------------------

B. Consistency With Exchange Act Rule 17Ad-22(e)(6)

    The Commission believes that the changes proposed in the Advance

[[Page 24541]]

Notice are consistent with Rule 17Ad-22(e)(6) under the Exchange Act, 
which requires that OCC establish, implement, maintain, and enforce 
written policies and procedures reasonably designed to cover its credit 
exposures to its participants by establishing a risk-based margin 
system that, among other things: (i) Considers, and produces margin 
levels commensurate with the risks and particular attributes of each 
relevant product, portfolio, and market; (ii) calculates margin 
sufficient to cover its potential future exposure to participants in 
the interval between the last margin collection and the close out of 
positions following a participant default; and (iii) uses reliable 
sources of timely price data and uses procedures and sound valuation 
models for addressing circumstances in which pricing data is not 
readily available or reliable.\107\
---------------------------------------------------------------------------

    \107\ 17 CFR 240.17AD-22(e)(6).
---------------------------------------------------------------------------

    As described above, the proposal contained in the Advance Notice 
would make several amendments to OCC's margin methodology designed to 
improve how it: (i) Accounts for asymmetry in conditional variance; 
\108\ (ii) models the statistical distribution of price returns; \109\ 
(iii) models second-day volatility forecasts; \110\ (iv) estimates 
covariance and correlations between risk factors to provide for stable 
and sensitive correlation estimations; \111\ and (v) treats defaulting 
securities by reducing the impact that illiquid securities with 
discontinuous data have on default variance estimates.\112\
---------------------------------------------------------------------------

    \108\ See Notice of Filing of Advance Notice, 82 FR at 61357.
    \109\ Id.
    \110\ Id.
    \111\ Id.
    \112\ See Notice of Filing of Advance Notice, 82 FR at 61357-
61358.
---------------------------------------------------------------------------

    The Commission believes the modifications proposed are designed to 
improve the manner in which STANS would calculate daily margin 
requirements for OCC's clearing members. Consequently, the Commission 
believes that the proposal is designed both (i) to consider, and 
produce margin levels commensurate with, the risks and particular 
attributes of each relevant product, portfolio, and market \113\ and 
(ii) to calculate margin sufficient to cover OCC's potential future 
exposure to participants in the interval between the last margin 
collection and the close out of positions following a participant 
default.\114\ Additionally, as discussed in the Advance Notice,\115\ 
the proposal would introduce daily updates for price data for equity 
products. This data would be obtained from a reliable industry vendor. 
Consequently, the Commission believes that the proposal contained in 
the Advance Notice would help ensure that OCC's margin methodology 
would utilize a reliable source of timely price data, which would 
better reflect current market conditions than the current monthly 
updates, and thereby result in more accurate and responsive margin 
requirements.\116\ Consequently, the Commission finds that the proposal 
is consistent with Exchange Act Rule 17Ad-22(e)(6).
---------------------------------------------------------------------------

    \113\ See 17 CFR 240.17Ad-22(e)(6)(i).
    \114\ See 17 CFR 240.17Ad-22(e)(6)(iii).
    \115\ See Notice, 82 FR at 61356.
    \116\ See 17 CFR 240.17Ad-22(e)(6)(iv).
---------------------------------------------------------------------------

V. Conclusion

    It is therefore noticed, pursuant to Section 806(e)(1)(I) of the 
Payment Supervision Act,\117\ that the Commission does not object to 
Advance Notice (SR-OCC-2017-811) and that OCC is authorized to 
implement the proposed change.
---------------------------------------------------------------------------

    \117\ 12 U.S.C. 5465(e)(1)(G).

    By the Commission.
Eduardo A. Aleman,
Assistant Secretary.
[FR Doc. 2018-11454 Filed 5-25-18; 8:45 am]
 BILLING CODE 8011-01-P



                                               24536                          Federal Register / Vol. 83, No. 103 / Tuesday, May 29, 2018 / Notices

                                               SECURITIES AND EXCHANGE                                 that would result in stable and realistic               requirements.14 STANS utilizes large-
                                               COMMISSION                                              risk estimates for such securities.6 The                scale Monte Carlo simulations to
                                                                                                       Advance Notice was published for                        forecast price and volatility movements
                                               [Release No. 34–83305; File No. SR–OCC–
                                               2017–811]
                                                                                                       comment in the Federal Register on                      in determining a clearing member’s
                                                                                                       December 27, 2017.7 On January 11,                      margin requirement.15 The STANS
                                               Self-Regulatory Organizations; The                      2018, the Commission requested OCC                      margin requirement is calculated at the
                                               Options Clearing Corporation; Notice                    provide it with additional information                  portfolio level of clearing member
                                               of No Objection To Advance Notice                       regarding the Advance Notice.8 OCC                      accounts with positions in marginable
                                               Filing Concerning The Options                           responded to this request for                           securities and consists of an estimate of
                                               Clearing Corporation’s Margin                           information on January 23, 2018.9 On                    a 99% expected shortfall 16 over a two-
                                               Methodology                                             March 22, 2018, the Commission                          day time horizon and an add-on margin
                                                                                                       determined that the Advance Notice                      charge for model risk (the
                                               May 23, 2018.                                           raises complex issues because OCC                       concentration/dependence stress test
                                               I. Introduction                                         proposes to make detailed, substantial,                 charge).17 The STANS methodology is
                                                                                                       and numerous changes to its margin                      used to measure the exposure of
                                                  On November 13, 2017, The Options                    methodology.10 As such, the                             portfolios of options and futures cleared
                                               Clearing Corporation (‘‘OCC’’) filed with               Commission extended review period of                    by OCC and cash instruments in margin
                                               the Securities and Exchange                             the Advance Notice until May 23,                        collateral.18
                                               Commission (‘‘Commission’’) advance                     2018.11 As of May 23, 2018, the                            A ‘‘risk factor’’ within OCC’s margin
                                               notice SR–OCC–2017–811 (‘‘Advance                       Commission has received one comment                     system may be defined as a product or
                                               Notice’’) pursuant to Section 806(e)(1) of              letter on the proposal contained in the                 attribute whose historical data are used
                                               the Payment, Clearing, and Settlement                   Advance Notice.12 This publication                      to estimate and simulate the risk for an
                                               Supervision Act of 2010 (‘‘Payment                      serves as notice of no objection to the                 associated product.19 The majority of
                                               Supervision Act’’) 1 and Rule 19b–                      Advance Notice.                                         risk factors utilized in the STANS
                                               4(n)(1)(i) under the Securities Exchange                                                                        methodology are total returns on
                                               Act of 1934 (‘‘Exchange Act’’) 2 to                     II. Background 13                                       individual equity securities. Other risk
                                               propose several enhancements to OCC’s                   OCC’s Current Margin Methodology                        factors considered include: Returns on
                                               margin methodology, the System for                                                                              equity indexes; returns on implied
                                               Theoretical Analysis and Numerical                        OCC’s margin methodology, the
                                                                                                       System for Theoretical Analysis and                     volatility risk factors that are a set of
                                               Simulations (‘‘STANS’’), OCC’s                                                                                  nine chosen volatility pivots per
                                               proprietary risk management system                      Numerical Simulations (‘‘STANS’’),
                                                                                                       calculates clearing member margin                       product; changes in foreign exchange
                                               that calculates clearing member margin                                                                          rates; securities underlying equity-based
                                               requirements.3 The proposed changes                                                                             products; and changes in model
                                                                                                       for calibration are classified as ‘‘defaulting
                                               would modify OCC’s margin                               securities.’’ See Notice, 82 FR at 61355, note 15.      parameters that sufficiently capture the
                                               methodology to: (1) Obtain daily price                     6 See Notice infra note 7, at 82 FR 61354.           model dynamics from a larger set of
                                               data for equity products (including daily                  7 Exchange Act Release No. 82371 (Dec. 20, 2017),
                                                                                                                                                               data.20
                                               corporate action-adjusted returns of                    82 FR 61354 (Dec. 27, 2017) (SR–OCC–2017–811)              Under OCC’s current margin
                                               equities where prices and thus returns                  (‘‘Notice’’). On November 13, 2017, OCC also filed
                                                                                                       a related proposed rule change (SR–OCC–2017–022)
                                                                                                                                                               methodology, OCC obtains monthly
                                               of securities are adjusted for any                      with the Commission pursuant to Exchange Act            price data for most of its equity-based
                                               dividends issued, stock splits, etc.) for               Section 19(b)(1) and Rule 19b-4 thereunder, seeking     products from a third-party vendor.21
                                               use in the daily estimation of                          approval of changes to its rules necessary to           This data arrive around the second week
                                               econometric model parameters; (2)                       implement the proposal contained in the Advance
                                                                                                       Notice (‘‘Proposed Rule Change’’). 15 U.S.C.
                                                                                                                                                               of every month in arrears and require
                                               enhance its econometric model for                       78s(b)(1) and 17 CFR 240.19b–4, respectively. The       approximately four weeks for OCC to
                                               updating statistical parameters (e.g.,                  Proposed Rule Change was published in the               process prior to installing into OCC’s
                                               parameters concerning correlations or                   Federal Register on December 4, 2017. Exchange          margin system.22 As a result,
                                               volatility) for all risk factors that reflect           Act Release No. 82161 (Nov. 28, 2017), 82 FR 57306      correlations and statistical parameters
                                                                                                       (Dec. 4, 2017) (SR–OCC–2017–022).
                                               the most recent data obtained; (3)                         8 See Memorandum from Office of Clearance and        for risk factors at any point in time
                                               improve the sensitivity and stability of                Settlement, Division of Trading and Markets, dated      represent stale data and therefore may
                                               correlation estimates across risk factors               January 12, 2018, available at https://www.sec.gov/     not be representative of the most recent
                                               by using de-volatized 4 returns (but                    comments/sr-occ-2017-811/occ2017811.htm.                market data.23 In the absence of daily
                                                                                                          9 See Memorandum from Office of Clearance and
                                               using a 500 day look back period); and                                                                          updates, OCC employs an approach
                                                                                                       Settlement, Division of Trading and Markets, dated
                                               (4) improve OCC’s methodology related                   March 6, 2018, available at https://www.sec.gov/
                                               to the treatment of defaulting securities 5             comments/sr-occ-2017-811/occ2017811.htm.
                                                                                                                                                                 14 See Exchange Act Release No. 53322 (Feb. 15,

                                                                                                          10 See Extension Notice, 82 FR at 13315.             2006), 71 FR 9403 (Feb. 23, 2006) (File No. SR–
                                                 1 12 U.S.C. 5465(e)(1). The Financial Stability          11 Id.
                                                                                                                                                               OCC–2004–20).
                                                                                                                                                                 15 See OCC Rule 601; see also Notice, 82 FR at
                                               Oversight Council designated OCC a systemically            12 See letter from Michael Kitlas, dated November
                                               important financial market utility (‘‘SIFMU’’) on                                                               61355.
                                                                                                       28, 2017, to Eduardo A. Aleman, Assistant                 16 See Notice, 82 FR at 61355.
                                               July 18, 2012. See Financial Stability Oversight        Secretary, Commission, available at https://
                                               Council 2012 Annual Report, Appendix A,                 www.sec.gov/comments/sr-occ-2017-022/                     The expected shortfall component is established
                                               available at http://www.treasury.gov/initiatives/       occ2017022.htm (‘‘Kitlas Letter’’). After reviewing     as the estimated average of potential losses higher
                                               fsoc/Documents/2012%20Annual%20Report.pdf.                                                                      than the 99% value at risk threshold. See Notice,
                                                                                                       the Kitlas Letter, the Commission believes that it is
                                               Therefore, OCC is required to comply with the                                                                   82 FR at 61355, note 8.
                                                                                                       nonresponsive to the Advance Notice and therefore         17 See Notice, 82 FR at 61355. A detailed
                                               Payment Supervision Act and file advance notices        outside the scope of the proposal.
                                               with the Commission. See 12 U.S.C. 5465(e).                                                                     description of the STANS methodology is available
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                                                                                                          Since the proposal contained in the Advance
                                                 2 17 CFR 240.19b–4(n)(1)(i).                                                                                  at http://optionsclearing.com/risk-management/
                                                                                                       Notice was also filed as a proposed rule change, all
                                                 3 See Notice infra note 7, at 82 FR 61355.                                                                    margins/. See Notice, 82 FR at 61355, note 9.
                                                                                                       public comments received on the proposal are              18 See Notice, 82 FR at 61355.
                                                 4 De-volatization is a process of normalizing         considered regardless of whether the comments are
                                                                                                                                                                 19 Id.
                                               historical data with the associated volatility thus     submitted on the Proposed Rule Change or the
                                                                                                                                                                 20 Id.
                                               facilitating comparison between different sets of       Advance Notice.
                                                                                                                                                                 21 Id.
                                               data.                                                      13 The description of the background of the
                                                 5 Within the context of OCC’s margin system,                                                                    22 Id.
                                                                                                       proposal is substantially excerpted from the Notice.
                                               securities that do not have enough historical data      See Notice, 82 FR at 61355.                               23 Id.




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                                                                               Federal Register / Vol. 83, No. 103 / Tuesday, May 29, 2018 / Notices                                                24537

                                               where one or more identified market                      the associated scale-factors used to scale              related to the treatment of defaulting
                                               proxies (or ‘‘scale-factors’’) are used to               up volatility) is also subject to sudden                securities by reducing the impact that
                                               incorporate day-to-day market volatility                 jumps across successive months because                  illiquid securities with discontinuous
                                               across all associated asset classes                      it is derived from monthly data updates,                data have on default variance estimates.
                                               throughout.24 The scale-factor approach,                 as opposed to daily updates, which are                  Each of these proposals is discussed in
                                               however, assumes a perfect correlation                   prone to wider fluctuations and are                     more detail below.
                                               of the volatilities between the security                 subject to adjustments using scale-
                                                                                                                                                                1. Daily Updates of Price Data
                                               and its scale-factor, which gives little                 factors.35
                                               room to capture the idiosyncratic risk of                                                                           OCC proposes to introduce daily
                                                                                                        III. Description of the Proposal in the                 updates for price data for equity
                                               a given security and is different from the               Advance Notice 36
                                               broad market risk represented by the                                                                             products, including daily corporate
                                               scale-factor.25                                             The Advance Notice proposes                          action-adjusted returns of equities,
                                                  In addition, OCC imposes a floor on                   changes to OCC’s margin methodology,                    Exchange Traded Funds (‘‘ETFs’’),
                                               volatility estimates for its equity-based                STANS. More specifically, OCC                           Exchange Traded Notes (‘‘ETNs’’) and
                                               products using a 500-day look back                       proposes to: (1) Obtain daily price data                certain indexes.40 OCC believes that the
                                               period.26 OCC believes that using                        for equity products (including daily                    proposed change would help ensure
                                               monthly price data, coupled with the                     corporate action-adjusted returns of                    that OCC’s margin methodology is
                                               dependency of margins on scale-factors                   equities where price and thus returns of                reliant on data that is more
                                               and the volatility floor can result in                   securities are adjusted for any dividends               representative of current market
                                               imprecise changes in margins charged to                  issued, stock splits, etc.) for use in the              conditions, thereby resulting in more
                                               clearing members, specifically across                    daily estimation of econometric model                   accurate and responsive margin
                                               periods of heavy volatility when the                     parameters; (2) enhance its econometric                 requirements.41 In addition, OCC
                                               correlation between the risk factor and                  model for updating statistical                          believes that the introduction of daily
                                               a scale-factor fluctuate.27                              parameters (e.g., parameters concerning                 price updates would enable OCC’s
                                                  OCC’s current methodology for                         correlations or volatility) for all risk                margin methodology to better capture
                                               estimating covariance and correlations                   factors that reflect the most recent data               both market and idiosyncratic risk by
                                               between risk factors relies on the same                  obtained; (3) improve the sensitivity and               allowing for daily updates to the
                                               monthly data described above, resulting                  stability of correlation estimates across               parameters associated with the
                                               in a similar lag time between updates.28                 risk factors by using de-volatized 37                   econometric model (discussed below)
                                                                                                        returns (but using a 500 day look back                  that captures the risk associated with a
                                               In addition, correlation estimates are
                                                                                                        period); and (4) improve OCC’s                          particular product, and therefore help
                                               based off historical returns series, with
                                                                                                        methodology related to the treatment of                 ensure that OCC’s margin requirements
                                               estimates between a pair of risk factors
                                                                                                        defaulting securities 38 that would result              are based on more current market
                                               being highly sensitive to the volatility of
                                                                                                        in stable and realistic risk estimates for              conditions.42 As a result, OCC would
                                               either risk factor in the chosen pair.29
                                                                                                        such securities.                                        also reduce its reliance on the use of
                                               Accordingly, OCC believes that the                          As a general matter, OCC believes that
                                               current approach results in potentially                                                                          scale-factors to incorporate day-to-day
                                                                                                        introducing daily updates for price data                market volatility, which OCC believes
                                               less stable correlation estimates that                   would result in more accurate margin
                                               may not be representative of current                                                                             give little room to capture the
                                                                                                        requirements that are based off of the                  idiosyncratic risk of a given security and
                                               market conditions.30                                     most recent market data. OCC also
                                                  Finally, under OCC’s existing margin                                                                          is different from the broad market risk
                                                                                                        believes that the other model                           represented by the scale-factor.43
                                               methodology, theoretical price scenarios                 enhancements would, among other
                                               for ‘‘defaulting securities’’ 31 are                     things, improve OCC’s approach to                       2. Proposed Enhancements to the
                                               simulated using uncorrelated return                      estimating covariance and correlations                  Econometric Model
                                               scenarios with an average zero return                    between risk factors in an effort to
                                               and a pre-specified volatility called                                                                               In addition to introducing daily
                                                                                                        achieve more accurate and timely                        updates for price and corporate action-
                                               ‘‘default variance.’’ 32 The default                     correlation estimations.39 OCC further                  adjusted returns data, OCC is proposing
                                               variance is estimated as the average of                  represents that the proposed changes                    enhancements to its econometric model
                                               the top 25 percent quantile of the                       would improve OCC’s methodology                         for calculating statistical parameters for
                                               conditional variances of all securities.33
                                                                                                                                                                all qualifying risk factors that reflect the
                                               As a result, OCC believes that these                       35 Id.
                                                                                                                                                                most recent data obtained (e.g., OCC
                                               default estimates may be impacted by                       36 The description of the proposal is substantially
                                                                                                                                                                would be able to calculate parameters
                                               extremely illiquid securities with                       excerpted from the Notice. See Notice, 82 FR at
                                                                                                        61356–61358.                                            such as volatility and correlations on a
                                               discontinuous data.34 In addition, OCC
                                                                                                          In addition to the proposed methodology changes       daily basis using the new daily price
                                               believes that the default variance (and                  described herein, OCC also would make some              data discussed above). More
                                                                                                        clarifying and clean-up changes, unrelated to the
                                                 24 Id.
                                                                                                        proposed changes described herein, to update its
                                                                                                                                                                specifically, OCC proposes to enhance
                                                 25 Id.                                                 margin methodology to reflect existing practices for    its econometric model by: (i)
                                                 26 See Notice, 82 FR at 61355.                         the daily calibration of seasonal and non-seasonal      Introducing daily updates for statistical
                                                 In risk management, it is a common practice to         energy models and the removal of methodology            parameters; (ii) introducing features in
                                               establish a floor for volatility at a certain level in   language for certain products that are no longer
                                                                                                        cleared by OCC. See Notice, 82 FR at 61356, note
                                                                                                                                                                its econometric model that are designed
                                               order to protect against procyclicality in the model.
                                               See Notice, 82 FR at 61355, note 14.                     17.                                                     to take into account asymmetry in the
                                                                                                                                                                model used to forecast volatility
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                                                                                                          37 De-volatization is a process of normalizing
                                                 27 See Notice, 82 FR at 61355.
                                                 28 Id.                                                 historical data with the associated volatility thus     associated with a risk factor ; (iii)
                                                                                                        facilitating comparison between different sets of
                                                 29 Id.
                                                                                                        data.
                                                                                                                                                                modifying the statistical distribution
                                                 30 Id.
                                                                                                          38 See supra note 5.
                                                 31 See supra note 5.                                                                                            40 See   Notice, 82 FR at 61356.
                                                                                                          39 OCC’s covariance and correlation analytics
                                                 32 See Notice, 82 FR at 61355.                                                                                  41 Id.
                                                                                                        estimate whether risk factors are positively or
                                                 33 Id.                                                                                                          42 Id.
                                                                                                        inversely related and to what extent any
                                                 34 Id.                                                 relationship exists.                                     43 Id.




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                                               24538                          Federal Register / Vol. 83, No. 103 / Tuesday, May 29, 2018 / Notices

                                               used to model the returns of equity                     distribution 50 (the Student’s t-                     in more accurately estimated two-day
                                               prices; (iv) introducing a second-day                   distribution) to model returns; 51                    scenario distributions, and therefore
                                               forecast for volatility into the model to               however, price scenarios generated                    more accurate and responsive margin
                                               estimate the two-day scenario                           using very large log-return scenarios                 requirements.61
                                               distributions for risk factors; and (v)                 (positive) that follow this distribution
                                                                                                                                                             v. Anti-Procyclical Floor for Volatility
                                               imposing a floor on volatility estimates                can approach infinity and could
                                                                                                                                                             Estimates
                                               using a 10-year look back period. These                 potentially result in excessively large
                                               proposed model enhancements are                         price jumps, a known limitation of this                  In addition, OCC proposes to modify
                                               described in detail below.                              distribution.52 Under the proposal, OCC               its floor for volatility estimates. OCC
                                                                                                       would adopt a more defined                            currently imposes a floor on volatility
                                               i. Daily Updates for Statistical                                                                              estimates for its equity-based products
                                                                                                       distribution (Standardized Normal
                                               Parameters                                                                                                    using a 500-day look back period.62
                                                                                                       Reciprocal Inverse Gaussian or NRIG)
                                                  Under the proposal, the statistical                  for modeling returns, which OCC                       Under the proposal, OCC would extend
                                               parameters for the model would be                       believes would more appropriately                     this look back period to 10 years (2520
                                               updated on a daily basis using the new                  simulate future returns based on the                  days) in the enhanced model and apply
                                               daily price data obtained by OCC from                   historical price data for the products in             this floor to volatility estimates for other
                                               a reliable third-party (as described                    question and allows for more                          products (excluding implied volatility
                                               above).44 As a result, OCC would no                     appropriate modeling of fat tails.53 As a             risk factor scenarios).63 OCC believes
                                               longer need to rely on scale-factors to                 result, OCC believes that the proposed                that using a longer 10-year look back
                                               approximate day-to-day market                           change would lead to more consistent                  period will help ensure that OCC
                                               volatility for equity-based products.45                 treatment of log returns both on the                  captures sufficient historical events/
                                               OCC believes that calibrating statistical               upside as well as downside of the                     market shocks in the calculation of its
                                               parameters on a daily basis would allow                 distribution.54                                       anti-procyclical floor.64
                                               OCC to calculate more accurate margin
                                                                                                       iv. Second Day Volatility Forecast                    3. Proposed Enhancements to
                                               requirements that represent the most
                                                                                                                                                             Correlation Estimates
                                               recent market data.46                                      OCC further proposes to introduce a
                                                                                                       second-day forecast for volatility into                  As described above, OCC’s current
                                               ii. Proposed Enhancements To Capture                                                                          methodology for estimating covariance
                                               Asymmetry in Conditional Variance                       the econometric model to estimate the
                                                                                                       two-day scenario distributions for risk               and correlations between risk factors
                                                  The current approach for forecasting                 factors.55 Under the current                          relies on the same monthly price data
                                               the conditional variance for a given risk               methodology, OCC typically uses a two-                feeding the econometric model,
                                               factor does not consider the asymmetric                 day horizon to determine its risk                     resulting in a similar lag time between
                                               volatility phenomenon observed in                       exposure to a given portfolio.56 This is              updates.65 In addition, correlation
                                               financial markets (also called the                      done by simulating 10,000 theoretical                 estimates are based off historical returns
                                               ‘‘leverage effect’’) where volatility is                price scenarios for the two-day horizon               series, with estimates between a pair of
                                               more accurate and timely and reactive                   using a one-day forecast conditional                  risk factors being highly sensitive to the
                                               to market downturns.47 Under the                        variance; the value at risk and expected              volatility of either risk factor in the
                                               proposal, OCC would amend its                           shortfall components of the margin                    chosen pair.66 The current approach
                                               econometric model to include new                        requirement are then determined from                  therefore results in correlation estimates
                                               features (i.e., incorporating asymmetry                 the simulated profit/loss distributions.57            being sensitive to volatile historical
                                               into its forecast volatility) designed to               These one-day and two-day returns                     data.67
                                               allow the conditional volatility forecast                                                                        In order to address these limitations,
                                                                                                       scenarios are both simulated using the
                                               to be more accurate and timely to                                                                             OCC proposes to enhance its
                                                                                                       one-day forecast conditional variance
                                               market downturns and thereby capture                                                                          methodology for calculating correlation
                                                                                                       estimate.58 OCC believes that this could
                                               the most significant dynamics of the                                                                          estimates by moving to a daily process
                                                                                                       lead to a risk factor’s coverage differing
                                               relationship between price and                                                                                for updating correlations (with a
                                                                                                       substantially on volatile trading days.59
                                               volatility observed in financial                                                                              minimum of one week’s lag) to help
                                                                                                       As a result, OCC proposes to introduce
                                               markets.48 OCC believes the proposed                                                                          ensure clearing member account
                                                                                                       a second-day forecast variance for all
                                               enhancement would result in more                                                                              margins are more current and thus more
                                                                                                       equity-based risk factors.60 The second-
                                               accurate and responsive margin                                                                                accurate.68 Moreover, OCC proposes to
                                                                                                       day conditional variance forecast would
                                               requirements, particularly in market                                                                          enhance its approach to modeling
                                                                                                       be estimated for each of the 10,000
                                               downturns.49                                                                                                  correlation estimates by de-volatizing 69
                                                                                                       Monte Carlo returns scenarios, resulting
                                                                                                                                                             the returns series to estimate the
                                               iii. Proposed Change in Statistical
                                                                                                                                                             correlations.70 Under the proposed
                                               Distribution                                              50 A data set with a ‘‘fat tail’’ is one in which

                                                                                                       extreme price returns have a higher probability of    approach, OCC would first consider the
                                                  OCC also proposes to change the                      occurrence than would be the case in a normal         returns excess of the mean (i.e., the
                                               statistical distribution used to model the              distribution. See Notice, 82 FR at 61357, note 21.    average estimated from historical data
                                               returns of equity prices. OCC’s current                   51 See Notice, 82 FR at 61357.
                                                                                                                                                             sample) and then further scale them by
                                               methodology uses a fat tailed                             52 Id.
                                                                                                                                                             the corresponding estimated conditional
                                                                                                         53 Id.
                                                                                                         54 Id.
                                                 44 See Notice, 82 FR at 61356. OCC notes that this
                                                                                                                                                               61 Id.
                                                                                                         55 Id. This proposed change would not apply to
                                               change would apply to most risk factors with the                                                                62 Id.
                                               exception of certain equity indexes, Treasury           STANS implied volatility scenario risk factors. For
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                                                                                                                                                               63 Id.
                                               securities, and energy futures products, which are      those risk factors, OCC’s existing methodology
                                                                                                                                                               64 Id.
                                               already updated on a daily basis. See Notice, 82 FR     would continue to apply. See Notice, 82 FR at
                                               61356, at note 18.                                      61357, note 23.                                         65 Id.

                                                 45 See Notice, 82 FR at 61356.                          56 See Notice, 82 FR at 61357.                        66 Id.

                                                 46 Id.                                                  57 Id.                                                67 Id.

                                                 47 See Notice, 82 FR at 61357.                          58 Id.                                                68 Id.

                                                 48 Id.                                                  59 Id.                                                69 Id.
                                                 49 Id.                                                  60 Id.                                                70 Id.




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                                                                                Federal Register / Vol. 83, No. 103 / Tuesday, May 29, 2018 / Notices                                                     24539

                                               variances.71 OCC believes that using de-                  risk factors.82 OCC believes that this                 uncorrelated scenarios, which OCC
                                               volatized returns would lead to                           change in methodology would help                       believes is not a realistic approach.93
                                               normalizing returns across a variety of                   ensure that while the estimate is
                                                                                                                                                                IV. Discussion and Commission
                                               asset classes and make the correlation                    aggressive it is also robust to the                    Findings
                                               estimator less sensitive to sudden                        presence of outliers caused by a few
                                               market jumps and therefore more                           extremely volatile securities that                        Although the Act does not specify a
                                               stable.72                                                 influence the location parameter of a                  standard of review for an advance
                                                                                                         distribution.83 Moreover, as a                         notice, the stated purpose of the Act is
                                               4. Defaulting Securities Methodology
                                                                                                         consequence of the daily updates                       instructive: To mitigate systemic risk in
                                                  Under the proposal, OCC would                          described above, the default variances                 the financial system and promote
                                               enhance its methodology for estimating                                                                           financial stability by, among other
                                                                                                         would change daily and there would be
                                               the defaulting variance in its model.73                                                                          things, promoting uniform risk
                                                                                                         no scale-factor to amplify the effect of
                                               OCC’s margin system is dependent on                                                                              management standards for SIFMUs and
                                                                                                         the variance on risk factor coverage.84
                                               market data to determine clearing                                                                                strengthening the liquidity of SIFMUs.94
                                               member margin requirements.74                             ii. Proposed Change in Time Series                        Section 805(a)(2) of the Act 95
                                               Securities that do not have enough                                                                               authorizes the Commission to prescribe
                                               historical data are classified as                            Under the proposal, OCC would use                   regulations containing risk-management
                                               ‘‘defaulting securities’’ within OCC                      a shorter time series to enable                        standards for the payment, clearing, and
                                               systems.75 As noted above, within                         calibration of the model for all                       settlement activities of designated
                                               current STANS systems, the theoretical                    securities.85 Currently, OCC does not                  clearing entities engaged in designated
                                               price scenarios for defaulting securities                 calibrate parameters for defaulting                    activities for which the Commission is
                                               are simulated using uncorrelated return                   securities that have historical data of                the supervisory agency. Section 805(b)
                                               scenarios with a zero mean and a                          less than two years.86 OCC is proposing                of the Act 96 provides the following
                                               default variance, with the default                        to shorten this time period to                         objectives and principles for the
                                               variance being estimated as the average                   approximately 6 months (180 days) to                   Commission’s risk-management
                                               of the top 25 percent quantile of the                     enable calibration of the model for all                standards prescribed under Section
                                               conditional variances of all securities.76                securities within OCC systems.87 OCC                   805(a):
                                               As a result, these default estimates may                  believes that this shorter time series is                 • To promote robust risk
                                               be impacted by extremely illiquid                         sufficient to produce stable calibrated                management;
                                               securities with discontinuous data.77 In                  parameters.88                                             • to promote safety and soundness;
                                               addition, the default variance (and the                                                                             • to reduce systemic risks; and
                                               associated scale-factors used to scale up                 iii. Proposed Default Correlation                         • to support the stability of the
                                               volatility) is also subject to sudden                                                                            broader financial system.
                                               jumps across volatile months.78 To                           Under the proposal, returns scenarios
                                                                                                         for defaulting securities 89 would be                     Section 805(c) provides, in addition,
                                               mitigate these concerns, OCC proposes                                                                            that the Commission’s risk-management
                                               to: (i) Use only optionable equity                        simulated using a default correlation
                                                                                                         with the driver RUT.90 The default                     standards may address such areas as
                                               securities to estimate the defaulting                                                                            risk-management and default policies
                                               variance; (ii) use a shorter time series to               correlation of the RUT index is roughly
                                                                                                         equal to the median of all positively                  and procedures, among others areas.97
                                               enable calibration of the model for all                                                                             The Commission has adopted risk-
                                               securities; and (iii) simulate default                    correlated securities with the index.91
                                                                                                                                                                management standards under Section
                                               correlations with the driver Russell                      Since 90% of the risk factors in OCC
                                                                                                                                                                805(a)(2) of the Act and the Exchange
                                               2000 index (‘‘RUT’’).79                                   systems correlate positively to the RUT
                                                                                                                                                                Act (the ‘‘Clearing Agency Rules’’).98
                                                                                                         index, OCC would only consider those
                                               i. Proposed Modifications to Securities                                                                          The Clearing Agency Rules require,
                                                                                                         risk factors to determine the median.92
                                               and Quantile Used in Estimation                                                                                  among other things, each covered
                                                                                                         OCC believes that the median of the
                                                                                                                                                                clearing agency to establish, implement,
                                                  Under the proposal, only optionable                    correlation distribution has been steady
                                                                                                                                                                maintain, and enforce written policies
                                               equity securities, which are typically                    over a number of simulations and is
                                                                                                                                                                and procedures that are reasonably
                                               more liquid, would be considered while                    therefore proposing that it replace the
                                                                                                                                                                designed to meet certain minimum
                                               estimating the default variance.80 This                   current methodology of simulating
                                                                                                                                                                requirements for operations and risk-
                                               limitation would eliminate from the
                                                                                                                                                                management practices on an ongoing
                                               estimation almost all illiquid securities                   82 Id.

                                               with discontinuous data that could                          83 Id.
                                                                                                                                                                  93 Id.
                                               contribute to high conditional variance                     84 Id.
                                                                                                                                                                  94 See  12 U.S.C. 5461(b).
                                                                                                           85 Id.
                                               estimates and thus a high default                                                                                  95 12  U.S.C. 5464(a)(2).
                                                                                                           86 Id.
                                               variance.81 In addition, OCC proposes to                                                                            96 12 U.S.C. 5464(b).
                                                                                                           87 Id.
                                               estimate the default variance as the                        88 Id.
                                                                                                                                                                   97 12 U.S.C. 5464(c).

                                               lowest estimate of the top 10% of the                       89 See  supra note 5.
                                                                                                                                                                   98 17 CFR 240.17Ad–22. See Securities Exchange

                                               floored conditional variance across the                                                                          Act Release No. 68080 (October 22, 2012), 77 FR
                                                                                                           90 See  Notice, 82 FR at 61358. OCC notes that, in   66220 (November 2, 2012) (S7–08–11). See also
                                                                                                         certain limited circumstances where there are          Securities Exchange Act Release No. 78961
                                                 71 Id.                                                  reasonable grounds backed by the existing return       (September 28, 2016), 81 FR 70786 (October 13,
                                                 72 Id.                                                  history to support an alternative approach in which    2016) (S7–03–14) (‘‘Covered Clearing Agency
                                                 73 Id.                                                  the returns are strongly correlated with those of an   Standards’’). The Commission established an
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                                                 74 See   Notice, 82 FR at 61357–61358.                  existing risk factor (a ‘‘proxy’’) with a full price   effective date of December 12, 2016, and a
                                                 75 See                                                  history, OCC’s margin methodology allows its           compliance date of April 11, 2017, for the Covered
                                                          Notice, 82 FR at 61358.
                                                 76 Id.
                                                                                                         Financial Risk Management staff to construct a         Clearing Agency Standards. On March 4, 2017, the
                                                                                                         ‘‘conditional’’ simulation to override any default     Commission granted covered clearing agencies a
                                                 77 Id.
                                                                                                         treatment that would have otherwise been applied       temporary exemption from compliance with Rule
                                                 78 Id.
                                                                                                         to the defaulting security. See Notice, 82 FR at       17Ad–22(e)(3)(ii) and certain requirements in Rules
                                                 79 Id.                                                  61358, note 26.                                        17Ad–22(e)(15)(i) and (ii) until December 31, 2017,
                                                 80 Id.                                                     91 See Notice, 82 FR at 61358.
                                                                                                                                                                subject to certain conditions. OCC is a ‘‘covered
                                                 81 Id.                                                     92 Id.                                              clearing agency’’ as defined in Rule 17Ad–22(a)(5).



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                                               24540                          Federal Register / Vol. 83, No. 103 / Tuesday, May 29, 2018 / Notices

                                               basis.99 As such, it is appropriate for the             conditions. For example, the proposal                    Taken together, the Commission
                                               Commission to review advance notices                    would: (i) Amend STANS to account for                 believes that these proposals would
                                               for consistency with the objectives and                 the asymmetric volatility phenomenon                  improve the accuracy of OCC’s credit
                                               principles for risk-management                          observed in financial markets and allow               exposure calculations and,
                                               standards described in the Clearing                     for conditional volatility forecast to be             consequently, OCC’s calculations of its
                                               Agency Rules.                                           more accurate and timely to market                    clearing members’ margin requirements.
                                                                                                       downturns;103 (ii) amend the statistical              Therefore, the Commission believes the
                                               A. Consistency With Section 805(b) of
                                                                                                       distribution for modeling equity price                changes proposed in the Advance
                                               the Act                                                                                                       Notice would promote robust risk
                                                                                                       returns to more appropriately model fat
                                                  The Commission believes that the                     tails and, consequently, more accurately              management, consistent with Section
                                               proposal contained in OCC’s Advance                     model returns; (iii) introduce a second-              805(b) of the Act.104
                                               Notice is consistent with the stated                    day volatility forecast into the model to                The Commission further believes that
                                               objectives and principles of Section                    provide for more accurate and timely                  the proposed changes would help
                                               805(b) of the Act. Specifically, as                     estimations of its two-day scenario                   promote safety and soundness, reduce
                                               discussed below, the Commission                         distributions then currently provided by              systemic risk and support the stability
                                               believes that the changes proposed in                   its one-day forecast variance; and (iv)               of the broader financial system. As
                                               the Advance Notice are consistent with                  amend STANS to impose a volatility                    described above, the proposed changes
                                               promoting robust risk management in                     floor using a 10-year look back period to             are designed to better limit OCC’s credit
                                               the area of credit risk and promoting                   reduce procyclicality in the margin                   exposure to the clearing members in the
                                               safety and soundness, which in turn,                    model by capturing sufficient market                  event of a clearing member default.
                                               would help reduce systemic risks and                    events in its calculations. Accordingly,              More specifically, the daily updates of
                                               support the stability of the broader                    the Commission believes that the                      the pricing data, the enhancements to
                                               financial system.100                                    introduction of enhancements to                       the econometric model, and the
                                                  The Commission believes that the                     improve the accuracy of the STANS                     enhancements to the correlation
                                               proposed changes promote robust risk                    margin models would enable OCC to                     estimates promote more accurate and
                                               management by enhancing OCC’s                           more effectively calculate clearing                   stable model measurements that have
                                               margin methodology for the reasons set                  members’ margin requirements.                         less volatility. Moreover, the
                                               forth below.                                               Third, as described earlier, OCC                   enhancements to the defaulting
                                                  First, as noted above, the STANS                     proposes to enhance its approach to                   securities methodology will decrease
                                               methodology is used to measure the                      model correlation estimates by moving                 the manner in which the default
                                               exposure of portfolios of options and                   to a daily process for updating                       estimates are affected by illiquid
                                               futures cleared by OCC and cash                         correlations and by de-volatizing the                 securities and reducing the amount to
                                               instruments in margin collateral on                     return series to estimate the                         which the default variance is subject to
                                               behalf of its clearing members, which                   correlations. This change is intended to              sudden jumps.
                                               allows OCC to calculate its clearing                    lead to normalized returns across a                      By better limiting credit exposure to
                                               members’ margin requirements.                           variety of asset classes and make the                 its clearing members, OCC’s proposed
                                               Currently, STANS makes these                            correlation estimator less sensitive to               changes are designed to help ensure
                                               calculation based on monthly price data                 sudden market jumps and therefore                     that, in the event of a clearing member
                                               obtained from a third-party vendor. To                  more stable. Accordingly, the                         default, OCC’s operations would not be
                                               make the calculations more accurate                     Commission believes that updating the                 disrupted and that its SIFMU functions
                                               and representative of recent market                     correlations daily and de-volatizing the              would therefore be able to continue in
                                               data, OCC proposes to amend its margin                  return series to reduce the estimator’s               a safe and sound manner. Furthermore,
                                               methodology to require the use of daily                 sensitivity to market jumps promotes                  the ongoing safe and sound functioning
                                               updates for equity price data instead of                more accurate and robust models within                of OCC via an enhanced ability to
                                               monthly updates, thereby reducing                       the STANS methodology.                                determine margin requirements should
                                               OCC’s reliance on scale-factors.101                                                                           help ensure that non-defaulting clearing
                                                                                                          Finally, to enhance its methodology
                                               Accordingly, the Commission believes                                                                          members would not be exposed to
                                                                                                       for estimating the defaulting securities
                                               that changing to daily price data                                                                             losses that they cannot anticipate or
                                                                                                       in its model, OCC proposes to: (i)
                                               updates would result in more accurate                                                                         control. As such, the Commission finds
                                                                                                       Modify the method for estimating the
                                               and timely estimations of OCC’s                                                                               that the proposed changes are consistent
                                                                                                       default variance to include only
                                               clearing members’ margin requirements.                                                                        with the promotion of safety and
                                                                                                       optionable equity securities; (ii) use a
                                                  Second, the proposal discussed above                                                                       soundness, which in turn, would reduce
                                                                                                       shorter time series of six months instead
                                               to amend OCC’s margin methodology to                                                                          systemic risks and support the stability
                                                                                                       of two years to enable calibration of the
                                               require the use of daily updates for price                                                                    of the broader financial system,
                                                                                                       model for all securities within OCC
                                               data would allow for updates to the                                                                           consistent with Section 805(b) of the
                                                                                                       systems; and (iii) simulate return
                                               margin model’s statistical parameters on                                                                      Act.105
                                                                                                       scenarios for defaulting securities
                                               a daily, instead of monthly, basis.102                                                                           Therefore, the Commission believes
                                                                                                       assuming a default correlation with the
                                               Similarly, the proposal would also                                                                            the changes proposed in the Advance
                                                                                                       driver RUT. Accordingly, the
                                               amend STANS to introduce other                                                                                Notice are consistent with Section
                                                                                                       Commission believes these changes will
                                               features that would improve the                                                                               805(b) of the Act.106
                                                                                                       mitigate the effect that extremely
                                               accuracy of its models and,
                                                                                                       illiquid securities with discontinuous                B. Consistency With Exchange Act Rule
                                               consequently, produce risk exposure
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                                                                                                       data can have on OCC’s default                        17Ad–22(e)(6)
                                               and margin requirement calculations
                                                                                                       estimates, while further decreasing the                 The Commission believes that the
                                               that better reflect current market
                                                                                                       degree to which the default variance is               changes proposed in the Advance
                                                 99 17 CFR 240.17Ad–22.
                                                                                                       subject to sudden jumps across volatile
                                                 100 12 U.S.C. 5464(b).                                months.                                                 104 12    U.S.C. 5464(b).
                                                 101 See supra note 40.                                                                                        105 Id.
                                                 102 See supra note 40.                                 103 See   Notice, 82 FR at 61357.                      106 Id.




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                                                                               Federal Register / Vol. 83, No. 103 / Tuesday, May 29, 2018 / Notices                                                  24541

                                               Notice are consistent with Rule 17Ad–                   for equity products. This data would be               Commission is publishing this notice to
                                               22(e)(6) under the Exchange Act, which                  obtained from a reliable industry                     solicit comments on the proposed rule
                                               requires that OCC establish, implement,                 vendor. Consequently, the Commission                  change from interested persons.
                                               maintain, and enforce written policies                  believes that the proposal contained in
                                                                                                                                                             I. Self-Regulatory Organization’s
                                               and procedures reasonably designed to                   the Advance Notice would help ensure
                                                                                                                                                             Statement of the Terms of Substance of
                                               cover its credit exposures to its                       that OCC’s margin methodology would
                                                                                                                                                             the Proposed Rule Change
                                               participants by establishing a risk-based               utilize a reliable source of timely price
                                               margin system that, among other things:                 data, which would better reflect current                 The Exchange filed a proposal to
                                               (i) Considers, and produces margin                      market conditions than the current                    amend a representation made in a rule
                                               levels commensurate with the risks and                  monthly updates, and thereby result in                change previously approved by the
                                               particular attributes of each relevant                  more accurate and responsive margin                   Commission relating to the listing and
                                               product, portfolio, and market; (ii)                    requirements.116 Consequently, the                    trading of the iShares Gold Strategy ETF
                                               calculates margin sufficient to cover its               Commission finds that the proposal is                 (the ‘‘Fund’’), a series of the iShares U.S.
                                               potential future exposure to participants               consistent with Exchange Act Rule                     ETF Trust (the ‘‘Trust’’).
                                               in the interval between the last margin                 17Ad–22(e)(6).                                           The text of the proposed rule change
                                               collection and the close out of positions                                                                     is available at the Exchange’s website at
                                                                                                       V. Conclusion                                         www.markets.cboe.com, at the principal
                                               following a participant default; and (iii)
                                               uses reliable sources of timely price data                It is therefore noticed, pursuant to                office of the Exchange, and at the
                                               and uses procedures and sound                           Section 806(e)(1)(I) of the Payment                   Commission’s Public Reference Room.
                                               valuation models for addressing                         Supervision Act,117 that the
                                                                                                       Commission does not object to Advance                 II. Self-Regulatory Organization’s
                                               circumstances in which pricing data is                                                                        Statement of the Purpose of, and
                                               not readily available or reliable.107                   Notice (SR–OCC–2017–811) and that
                                                                                                       OCC is authorized to implement the                    Statutory Basis for, the Proposed Rule
                                                  As described above, the proposal
                                                                                                       proposed change.                                      Change
                                               contained in the Advance Notice would
                                               make several amendments to OCC’s                          By the Commission.                                     In its filing with the Commission, the
                                               margin methodology designed to                                                                                Exchange included statements
                                                                                                       Eduardo A. Aleman,
                                               improve how it: (i) Accounts for                                                                              concerning the purpose of and basis for
                                                                                                       Assistant Secretary.
                                               asymmetry in conditional variance; 108                                                                        the proposed rule change and discussed
                                                                                                       [FR Doc. 2018–11454 Filed 5–25–18; 8:45 am]
                                               (ii) models the statistical distribution of                                                                   any comments it received on the
                                                                                                       BILLING CODE 8011–01–P                                proposed rule change. The text of these
                                               price returns; 109 (iii) models second-day
                                               volatility forecasts; 110 (iv) estimates                                                                      statements may be examined at the
                                               covariance and correlations between                                                                           places specified in Item IV below. The
                                                                                                       SECURITIES AND EXCHANGE
                                               risk factors to provide for stable and                                                                        Exchange has prepared summaries, set
                                                                                                       COMMISSION
                                               sensitive correlation estimations; 111 and                                                                    forth in Sections A, B, and C below, of
                                               (v) treats defaulting securities by                     [Release No. 34–83302; File No. SR–                   the most significant parts of such
                                               reducing the impact that illiquid                       CboeBZX–2018–034]                                     statements.
                                               securities with discontinuous data have                                                                       A. Self-Regulatory Organization’s
                                               on default variance estimates.112                       Self-Regulatory Organizations; Cboe
                                                                                                       BZX Exchange, Inc.; Notice of Filing                  Statement of the Purpose of, and
                                                  The Commission believes the
                                                                                                       and Immediate Effectiveness of a                      Statutory Basis for, the Proposed Rule
                                               modifications proposed are designed to
                                                                                                       Proposed Rule Change Relating to the                  Change
                                               improve the manner in which STANS
                                               would calculate daily margin                            Listing and Trading of the iShares                    1. Purpose
                                               requirements for OCC’s clearing                         Gold Strategy ETF, a Series of the
                                                                                                       iShares U.S. ETF Trust                                   The shares of the Fund (the ‘‘Shares’’)
                                               members. Consequently, the                                                                                    were approved for listing and trading on
                                               Commission believes that the proposal                   May 22, 2018.                                         the Exchange under Exchange Rule
                                               is designed both (i) to consider, and                      Pursuant to Section 19(b)(1) of the                14.11(i), which governs the listing and
                                               produce margin levels commensurate                      Securities Exchange Act of 1934                       trading of Managed Fund Shares.5 The
                                               with, the risks and particular attributes               (‘‘Act’’),1 and Rule 19b–4 thereunder,2               Shares have not yet commenced trading
                                               of each relevant product, portfolio, and                notice is hereby given that on May 9,                 on the Exchange. The Fund is a series
                                               market 113 and (ii) to calculate margin                 2018, Cboe BZX Exchange, Inc.                         of the Trust, which was established as
                                               sufficient to cover OCC’s potential                     (‘‘Exchange’’ or ‘‘BZX’’) filed with the              a Delaware statutory trust on June 21,
                                               future exposure to participants in the                  Securities and Exchange Commission                    2011. BlackRock Fund Advisors (the
                                               interval between the last margin                        (‘‘Commission’’) the proposed rule                    ‘‘Adviser’’) will serve as the investment
                                               collection and the close out of positions               change as described in Items I and II                 adviser to the Fund. The Trust is
                                               following a participant default.114                     below, which Items have been prepared                 registered with the Commission as an
                                               Additionally, as discussed in the                       by the Exchange. The Exchange has                     open-end management investment
                                               Advance Notice,115 the proposal would                   designated this proposal as a ‘‘non-                  company and has filed a registration
                                               introduce daily updates for price data                  controversial’’ proposed rule change                  statement on behalf of the Fund on
                                                                                                       pursuant to Section 19(b)(3)(A) of the                Form N–1A (‘‘Registration Statement’’)
                                                 107 17   CFR 240.17AD–22(e)(6).
                                                 108 See
                                                                                                       Act 3 and Rule 19b–4(f)(6)(iii) 4                     with the Commission.6
                                                           Notice of Filing of Advance Notice, 82 FR
                                               at 61357.                                               thereunder, which renders it effective
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                                                  109 Id.                                              upon filing with the Commission. The                     5 See Securities Exchange Act Release No. 83014

                                                  110 Id.                                                                                                    (April 9, 2018), 83 FR 16150 (April 13, 2018) (SR–
                                                                                                         116 See                                             CboeBZX–2017–023) (the ‘‘Approval Order’’).
                                                  111 Id.                                                        17 CFR 240.17Ad–22(e)(6)(iv).                  6 See Registration Statement on Form N–1A for
                                                  112 See Notice of Filing of Advance Notice, 82 FR      117 12U.S.C. 5465(e)(1)(G).
                                                                                                                                                             the Trust, filed with the Commission on November
                                               at 61357–61358.                                           1 15 U.S.C. 78s(b)(1).
                                                                                                                                                             1, 2017 (File Nos. 333–179904 and 811–22649). The
                                                  113 See 17 CFR 240.17Ad–22(e)(6)(i).                   2 17 CFR 240.19b–4.
                                                                                                                                                             descriptions of the Fund and the Shares contained
                                                  114 See 17 CFR 240.17Ad–22(e)(6)(iii).                 3 15 U.S.C. 78s(b)(3)(A).
                                                                                                                                                             herein are based, in part, on information in the
                                                  115 See Notice, 82 FR at 61356.                        4 17 CFR 240.19b–4(f)(6)(iii).                                                               Continued




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Document Created: 2018-05-26 00:48:42
Document Modified: 2018-05-26 00:48:42
CategoryRegulatory Information
CollectionFederal Register
sudoc ClassAE 2.7:
GS 4.107:
AE 2.106:
PublisherOffice of the Federal Register, National Archives and Records Administration
SectionNotices
FR Citation83 FR 24536 

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