# 2026-19123: Arca's 23-Hour Trading Halt Rules: Markets Never Truly Close

2026-19123, Self-Regulatory Organizations; NYSE Arca, Inc.; Notice of Filing and Immediate Effectiveness of Proposed Rule Change To Amend Rule 7.12-E Concerning the Resumption of Trading Following a Level 3 Market-Wide Circuit Breaker Halt in Connection With the 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, effective 2026-09-04; PRIA reads it as touching household money (as of 2026-09-25).

- Canonical: https://policyrisk.com/federal-register/2026-19123
- As of: 2026-09-25
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Document number: 2026-19123
- Title: Self-Regulatory Organizations; NYSE Arca, Inc.; Notice of Filing and Immediate Effectiveness of Proposed Rule Change To Amend Rule 7.12-E Concerning the Resumption of Trading Following a Level 3 Market-Wide Circuit Breaker Halt in Connection With the Expansion of Trading Hours to 23 Hours per Day, 5 Days per Week
- Type: Notice
- Agencies: Securities and Exchange Commission
- Citation: 91 FR 59256
- Published: 2026-09-18
- Effective: 2026-09-04
- Comments close: not stated
- Significant: no
- Touches household money: yes
- Regulation identifier numbers: none
- Last updated: 2026-09-25

## In one line

Arca's 23-Hour Trading Halt Rules: Markets Never Truly Close

## Summary

NYSE Arca is updating its rules to handle trading after a big market pause called a Level 3 circuit breaker. This change matches their new longer trading hours—23 hours a day, 5 days a week. Traders and investors will see smoother restarts after these halts, helping keep the market steady without messing with money or timing.

## Effects PRIA read

- Keep 4:00 a.m. Restart After Level 3 Halt: benefit, medium. If you trade or invest in U.S. stocks on NYSE Arca, trading after a Level 3 market-wide circuit breaker (a 20% S&P 500 drop) will not restart at 9:00 p.m. ET when overnight trading begins. Instead, trading will remain halted until 4:00 a.m. ET or later on the next trading day; the Exchange plans to…

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## Sources
- [2026-19123 on federalregister.gov](https://www.federalregister.gov/documents/2026/09/18/2026-19123/self-regulatory-organizations-nyse-arca-inc-notice-of-filing-and-immediate-effectiveness-of-proposed)
- [2026-19123 as published (PDF)](https://www.govinfo.gov/content/pkg/FR-2026-09-18/pdf/2026-19123.pdf)

## Related
- [Previous: 2026-19122, Self-Regulatory Organizations; NYSE National, Inc.; Notice of Filing and Immedi…](https://policyrisk.com/federal-register/2026-19122)
- [Next: 2026-19124, Self-Regulatory Organizations; NYSE American LLC; Notice of Filing and Immediat…](https://policyrisk.com/federal-register/2026-19124)
- [All Federal Register documents](https://policyrisk.com/federal-register)

Source: PRIA, https://policyrisk.com/federal-register/2026-19123 (as of 2026-09-25).