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

On September 9, 2026 Cboe EDGX Exchange, Inc. filed a proposed rule change (Release No. 34-106384; File No. SR-CboeEDGX-2026-057) to amend Exchange Rules 11.1, 11.6, 11.7, and 11.8. The filing, published in the Federal Register on September 15, 2026 (FR Doc No: 2026-19128, Vol. 91, No. 180, pp. 59253-59256), seeks immediate effectiveness of a new Time-in-Force (TIF) designation called "Regular `til Post Market" (RTP).

The RTP TIF would be a limit order eligible for execution during Regular Trading Hours (9:30 a.m. to 4:00 p.m. Eastern Time) and, if any portion remains unfilled, for execution during the Post-Closing Session (4:00 p.m. to 8:00 p.m. Eastern Time). Any unexecuted portion would expire at the end of the Post-Closing Session. An RTP order may be modified or cancelled under Rule 11.10(e) and receives priority treatment pursuant to Rule 11.9(a), consistent with existing Regular Hours Only (RHO) orders.

To integrate RTP, the Exchange proposes to add the designation to Rule 11.1(a), extending the existing restriction that prevents orders with a Minimum Execution Quantity and a RHO TIF from being entered before 4:00 a.m. Eastern Time (or before 7:00 a.m. Eastern Time for orders eligible for a 7:00 a.m. start). The same restriction would apply to RTP orders. Amendments to Rule 11.7 would permit RTP orders to participate in the Opening and Re-Opening Processes under the same conditions as RHO orders, and Rule 11.8(c) and (d) would be revised to reference RHO where it was previously omitted.

The complete text of the proposed amendment is available on the SEC's rules website and the Exchange's rule-filings page, as well as at the Exchange's principal office.