On January 8, 2024, Cboe BYX Exchange, Inc. (“BYX”) filed with the Securities and Exchange Commission (“Commission”), pursuant to section 19(b)(1) of the Securities Exchange Act of 1934 (“Act”),^[1] and Rule 19b-4 thereunder,^[2] a proposed rule change (File Number SR-CboeBYX-2024-003) to permit the use of the Post Only order instruction at prices below $1.00. The proposed rule change was published for comment in the Federal Register on January 29, 2024.^[3] On March 8, 2024, pursuant to section 19(b)(2) of the Act,^[4] the Commission designated a longer period within which to approve the proposed rule change, disapprove the proposed rule change, or institute proceedings to determine whether to disapprove the proposed rule change.^[5] On April 26, 2024, the Commission instituted proceedings pursuant to section 19(b)(2)(B) of the Act ^[6] to determine whether to approve or disapprove the proposed rule change.^[7] The Commission did not receive any comments on the proposal. On June 5, 2024, BYX withdrew the proposed rule change (SR-CboeBYX-2024-003).