# 2026-19122: Stock Trading 23 Hours a Day? Circuit Breakers Get Night Shift Update

2026-19122, Self-Regulatory Organizations; NYSE National, Inc.; Notice of Filing and Immediate Effectiveness of Proposed Rule Change To Amend Rule 7.12 Concerning the Resumption of Trading Following a Level 3 Market-Wide Circuit Breaker Halt in Connection With the Industry's Expansion of Trading Hours to 23 Hours Per Day, 5 Days Per Week, is a Federal Register notice from Securities and Exchange Commission published 2026-09-18; PRIA reads it as touching household money (as of 2026-09-25).

- Canonical: https://policyrisk.com/federal-register/2026-19122
- As of: 2026-09-25
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Document number: 2026-19122
- Title: Self-Regulatory Organizations; NYSE National, Inc.; Notice of Filing and Immediate Effectiveness of Proposed Rule Change To Amend Rule 7.12 Concerning the Resumption of Trading Following a Level 3 Market-Wide Circuit Breaker Halt in Connection With the Industry's Expansion of Trading Hours to 23 Hours Per Day, 5 Days Per Week
- Type: Notice
- Agencies: Securities and Exchange Commission
- Citation: 91 FR 59173
- Published: 2026-09-18
- Effective: unknown
- Comments close: not stated
- Significant: no
- Touches household money: yes
- Regulation identifier numbers: none
- Last updated: 2026-09-25

## In one line

Stock Trading 23 Hours a Day? Circuit Breakers Get Night Shift Update

## Summary

NYSE National is updating its rules to handle trading restarts after a big market pause called a Level 3 circuit breaker. This change matches the new longer trading hours—23 hours a day, 5 days a week—so trading can safely resume without confusion. Traders and investors will see smoother restarts during extreme market events, helping keep the market fair and orderly.

## Effects PRIA read

- Keeps 4:00 a.m. Reopening After Level 3 Halt: benefit, medium. If a Level 3 market-wide circuit breaker (a 20% S&P 500 drop) triggers a halt, trading on the Exchange will remain halted until 4:00 a.m. ET or later on the following trading day. This change makes explicit that trading will not resume earlier (for example at 9:00 p.m. ET) when some exchanges start…
- Overnight Trading Hours Start Dec 6, 2026: benefit, medium. Several exchanges plan to offer overnight trading from 9:00 p.m. ET to 4:00 a.m. ET beginning December 6, 2026. The Exchange states it does not intend to implement 23/5 trading at this time.

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## Sources
- [2026-19122 on federalregister.gov](https://www.federalregister.gov/documents/2026/09/18/2026-19122/self-regulatory-organizations-nyse-national-inc-notice-of-filing-and-immediate-effectiveness-of)
- [2026-19122 as published (PDF)](https://www.govinfo.gov/content/pkg/FR-2026-09-18/pdf/2026-19122.pdf)

## Related
- [Previous: 2026-19121, Self-Regulatory Organizations; NYSE Texas, Inc.; Notice of Filing and Immediate…](https://policyrisk.com/federal-register/2026-19121)
- [Next: 2026-19123, Self-Regulatory Organizations; NYSE Arca, Inc.; Notice of Filing and Immediate…](https://policyrisk.com/federal-register/2026-19123)
- [All Federal Register documents](https://policyrisk.com/federal-register)

Source: PRIA, https://policyrisk.com/federal-register/2026-19122 (as of 2026-09-25).