2026-19124NoticeWallet

NYSE American Joins 23-Hour Trading Frenzy with Halt Restart Rules

Published Date: 9/18/2026

Notice

Summary

NYSE American 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 resume smoothly and safely. Traders and investors will see these updates take effect right away, helping keep the market steady during wild swings.

Analyzed Economic Effects

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

Level 3 Halt Resumption at 4:00 a.m. ET

If the S&P 500 falls enough to trigger a Level 3 market-wide circuit breaker (a 20% single-day decline), trading on NYSE American will be halted and will not resume until 4:00 a.m. ET or later on the following trading day. This rule change codifies that resumption time even after the industry expands hours to 23 hours per day, 5 days per week (23/5 Trading) and reflects planned overnight sessions beginning December 6, 2026 on some exchanges.

Personalized for You

How does this regulation affect your finances?

Personalize government policy and PRIA will tell you what this federal register document means for your household, plus every other regulation we track. PRIA reads each provision against your financial profile to show you exactly what matters to your wallet.

Key Dates

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

Department and Agencies

Department
Independent Agency
Agency
Securities and Exchange Commission
Source: View HTML

Related Federal Register Documents

Previous / Next Documents

Back to Federal Register