Federal Register #SR-CboeBYX-2026-030

Proposed Rule Change: Addition of 'Regular til Post Market' Time-in-Force by Cboe BYX Exchange, Inc.

This notice concerns a proposed rule change by Cboe BYX Exchange, Inc. to introduce a new time-in-force (TIF) designation for limit orders. - Government buyer: - Securities and Exchange Commission (SEC) - Cboe BYX Exchange, Inc. (regulated entity submitting the rule change) - OEMs and vendors: - Cboe BYX Exchange, Inc. (only entity mentioned) - Products/services requested: - No products or services are being procured; this is a regulatory notice - Notable requirements: - Addition of 'Regular til Post Market' (RTP) TIF designation - Allows limit orders to execute during both Regular Trading Hours and After Hours Trading Session - Unexecuted portions expire at the end of the After Hours Trading Session - Conforming amendments to Exchange Rules 11.1(a), 11.9(b), and 11.23 - Integration of RTP into order handling and opening process rules - No procurement activity or contract value is associated with this notice

Description

This notice pertains to a proposed rule change filed by Cboe BYX Exchange, Inc. to amend Exchange Rules 11.1(a), 11.9(b), and 11.23. The amendment introduces a new time-in-force designation called "Regular til Post Market" (RTP), which allows limit orders to be executed during both Regular Trading Hours and the After Hours Trading Session, with any unexecuted portion expiring at the end of the After Hours Trading Session. The rule change also includes conforming amendments to integrate the RTP designation into the Exchange's order handling and opening process rules, ensuring consistent treatment with existing time-in-force options. The filing was published in the Federal Register on September 15, 2026.

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