Cboe BZX adds 'Regular til Post Market' time-in-force order type

On August 28, 2026, Cboe BZX Exchange, Inc. filed a proposed rule change (Release No. 34-106322; File No. SR-CboeBZX-2026-070) to amend Exchange Rules 11.1(a), 11.9(b), 11.23 and 11.24. The Securities and Exchange Commission published the filing in the Federal Register on September 10, 2026 (Vol. 91, No. 177, pp. 58501-58505; FR Doc No. 2026-18806) and designated the change as immediately effective under Section 19(b)(1) of the Exchange Act.

The amendment adds a new Time-in-Force (TIF) designation called "Regular `til Post Market" (RTP). An RTP order is a limit order that remains eligible for execution during Regular Trading Hours (9:30 a.m.-4:00 p.m. ET) and, if not fully filled, continues to be active in the After Hours Trading Session (4:00 p.m.-8:00 p.m. ET). Any portion unexecuted at the close of the After Hours Session expires automatically.

To accommodate the new TIF, Rule 11.1(a) is revised to place RTP orders under the same pre-7:00 a.m. ET entry restriction that applies to Minimum Quantity orders with a Regular Hours Only TIF. The rule also receives a technical correction to capitalize "Start" in the reference to order-eligibility times. Rule 11.23(a)(8) is amended to classify RTP orders as eligible for participation in Opening and Closing Auctions, mirroring the treatment of Regular Hours Only orders. Rule 11.24 is similarly updated to reflect the RTP designation across the Exchange's order-handling processes.

The Commission's notice invites comments from interested parties, but the RTP TIF is already in force and will apply to all BZX Members and Sponsored Participants submitting orders as of the filing date.