2026-19123NoticeWallet

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

Published Date: 9/18/2026

Notice

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.

Analyzed Economic Effects

1 provisions identified: 1 benefits, 0 costs, 0 mixed.

Keep 4:00 a.m. Restart After Level 3 Halt

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 begin 23 hours/day, 5 days/week trading on December 6, 2026.

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Key Dates

Effective Date
Published Date
9/4/2026
9/18/2026

Department and Agencies

Department
Independent Agency
Agency
Securities and Exchange Commission
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