# Federal Register #SR-CboeBZX-2026-077

SEC notice of proposed Cboe BZX rule change for trading resumption after a market-wide halt

**Buyer:** Securities and Exchange Commission
**Posted:** October 08, 2026
**Respond By:** October 29, 2026
**Identifier:** SR-CboeBZX-2026-077

This SEC notice concerns a proposed Cboe BZX trading rule change, not a government procurement opportunity.
- **Government agency:** U.S. Securities and Exchange Commission (SEC).
- **Filing organization:** Cboe BZX Exchange, Inc.; no procuring agency, sub-agency, or purchasing office is identified.
- **Proposed change:** Amend Cboe BZX Rule 11.30 so that after a Level 3 market-wide circuit breaker halt, trading remains halted until 4:00 a.m. ET or later on the following trading day, including during any expanded overnight trading hours.
- **Purpose:** Preserve the existing cooling-off period, support price discovery, and maintain consistent rules across U.S. securities markets.
- **Trading plans:** Cboe BZX states it does not currently intend to implement 23-hours-per-day, five-days-per-week trading.
- **Procurement details:** No products or services, quantities, part numbers, contract value, or period of performance are specified.

### Description

Cboe BZX Exchange, Inc. filed a proposed amendment to Rule 11.30 concerning trading resumption after a Level 3 market-wide circuit breaker halt. The change would specify that trading in all stocks on the Exchange remains halted until 4:00 a.m. ET or later on the following trading day, including after the introduction of overnight trading under the industry’s planned 23-hours-per-day, five-days-per-week schedule. The filing states that the change is intended to preserve the existing resumption time and maintain a cooling-off period and coordinated market rules. The Exchange says it does not intend to implement 23/5 Trading at this time.

[View original listing](https://www.federalregister.gov/documents/2026/10/08/2026-20601/self-regulatory-organizations-cboe-bzx-exchange-inc-notice-of-filing-and-immediate-effectiveness-of)