Cboe BYX adds 'Regular til Post Market' time-in-force order
The change, effective immediately on Aug. 28 2026, applies to all BYX Users - Members and Sponsored Participants - who submit orders on the exchange.
On August 28, 2026 Cboe BYX Exchange, Inc. filed a proposed rule change (Release No. 34-106320; File No. SR-CboeBYX-2026-030) with the SEC to amend Exchange Rules 11.1(a), 11.9(b) and 11.23. The Commission published the notice on September 10, 2026 (FR Doc No. 2026-18811) and opened a comment period.
The amendment creates a new time-in-force (TIF) designation, "Regular til Post Market" (RTP). An RTP order is a limit order that may execute during Regular Trading Hours (9:30 a.m. to 4:00 p.m. ET) and, if not fully filled, remains eligible for execution in the After Hours Trading Session (4:00 p.m. to 8:00 p.m. ET), expiring at the close of that session. Order priority and modification/cancellation rights follow the same rules as existing Regular Hours Only (RHO) orders.
To integrate RTP, Rule 11.1(a) will treat RTP like RHO for the pre-7:00 a.m. ET restriction on Minimum Quantity Orders. Rule 11.23 will add RTP to the list of orders eligible for the Opening Process and for participation in the Re-Opening Process, applying the same conditions that currently govern RHO orders.
The Exchange designated the filing as noncontroversial, provided the required notice under Rule 19b-4(f)(6)(iii), and posted the full text of the amendment on the SEC and BYX websites and at the Exchange's principal office.
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