# Federal Register #SR-NasdaqTX-2026-048

SEC notice of Nasdaq Texas’s proposed rule change for trading resumption after a Level 3 market-wide circuit breaker halt

**Buyer:** Securities and Exchange Commission
**Posted:** October 08, 2026
**Respond By:** October 29, 2026
**Identifier:** SR-NasdaqTX-2026-048
**NAICS:** 523210

The SEC notice describes a proposed Nasdaq Texas rule change for resuming trading after a Level 3 market-wide circuit breaker halt.
- **Government agency:** Securities and Exchange Commission (SEC).
- **Entity proposing the change:** Nasdaq Texas, LLC, a self-regulatory organization; it is not identified as a supplier or OEM.
- **Proposed change:** Amend Equity 4, Rule 4121 so trading remains halted until 4:00 a.m. ET or later on the following trading day after a Level 3 market-wide circuit breaker halt, including as exchanges expand overnight trading.
- **Purpose and operating context:** Preserve existing resumption timing, promote a consistent approach across self-regulatory organizations, and support orderly markets and price discovery. Nasdaq Texas does not intend to implement 23/5 trading at this time.
- **Procurement status:** This is a regulatory notice, not a procurement opportunity. No products, services, quantities, part numbers, or vendors are specified.

### Description

Nasdaq Texas, LLC proposes to amend Equity 4, Rule 4121 concerning trading resumption after a Level 3 market-wide circuit breaker halt. The proposed change would specify that trading in all stocks remains halted until 4:00 a.m. ET or later on the following trading day, including after exchanges introduce overnight trading hours. The notice states that the change is intended to preserve the existing resumption timing and maintain a coordinated market-wide approach; Nasdaq Texas does not intend to implement 23/5 trading at this time. The Securities and Exchange Commission notice invites public comments by October 29, 2026.

[View original listing](https://www.federalregister.gov/documents/2026/10/08/2026-20606/self-regulatory-organizations-nasdaq-texas-llc-notice-of-filing-and-immediate-effectiveness-of)