2026-19296NoticeWallet

NYSE Updates Error Rules for 24/7 Trading Chaos

Published Date: 9/22/2026

Notice

Summary

The New York Stock Exchange (NYSE) is updating its rules about fixing trading mistakes to match new 23-hour, 5-day trading hours. This change helps keep trades fair and clear when markets are open longer. Traders and investors will see these updates take effect right away, making sure errors get corrected quickly without messing with money.

Analyzed Economic Effects

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

Overnight trades generally not broken

If you trade or invest, trades executed during the Overnight Protected Hours (9:00 p.m. ET through 4:00 a.m. ET) that fall within the LULD Price Bands will generally not be eligible for cancellation as "clearly erroneous" starting at the commencement of 23/5 Trading on December 6, 2026. The rule extends the same LULD-based restrictions that already apply during the Core Trading Session to overnight hours.

Rights and warrants remain reviewable overnight

If you trade NMS stocks that are not subject to the LULD Plan (for example, rights and warrants), transactions executed during Overnight Protected Hours (9:00 p.m. ET through 4:00 a.m. ET) remain eligible for clearly erroneous review and will be reviewed using the same Numerical Guidelines that apply to the Early Trading Session. This treatment is effective at the commencement of 23/5 Trading on December 6, 2026.

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Key Dates

Published Date
Effective Date
9/22/2026
12/6/2026

Department and Agencies

Department
Independent Agency
Agency
Securities and Exchange Commission
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