# Federal Register #SR-IEX-2026-45

IEX proposes extending Level 3 market-wide circuit-breaker trading halts

**Buyer:** Securities and Exchange Commission
**Posted:** November 09, 2026
**Identifier:** SR-IEX-2026-45

The Securities and Exchange Commission (SEC) published a notice about a proposed trading-halt rule change from Investors Exchange LLC (IEX).
- **Government agency:** SEC; the notice concerns a proposed rule change filed by IEX.
- **Proposal:** IEX would amend Rule 11.271 to keep trading in all securities halted until 4:00 a.m. Eastern Time or later on the next trading day after a Level 3 market-wide circuit breaker.
- **Purpose:** Preserve a cooling-off period and coordinated market reopening as some exchanges move toward 23-hour-per-day, five-day-per-week trading; IEX says this supports orderly price discovery and harmonized market rules.
- **Other named organization:** FINRA. The notice also refers generally to other U.S. securities exchanges and self-regulatory organizations.
- **Procurement relevance:** This is a regulatory notice seeking public comments, not a procurement. No products, services, quantities, or commercial OEMs are requested.

### Description

Investors Exchange LLC proposes to amend Rule 11.271 concerning trading resumption after a Level 3 market-wide circuit breaker halt. The change would specify that trading in all securities remains halted until 4:00 a.m. Eastern Time or later on the following trading day. It is intended to preserve the current resumption time as exchanges expand to 23-hour, five-day trading, rather than allow trading to resume during overnight sessions. The SEC notice invites comments on the proposed rule change.

[View original listing](https://www.federalregister.gov/documents/2026/11/09/2026-22752/self-regulatory-organizations-investors-exchange-llc-notice-of-filing-and-immediate-effectiveness-of)