According to Nasdaq’s Q1 2026 earnings report and the Form 8-K filed with the SEC, Nasdaq’s 23-hour trading model (23/5) has been approved by the U.S. Securities and Exchange Commission (SEC) and will go live on December 6, 2026. At that time, the U.S. stock market will be closed for only one hour daily (8:00 PM to 9:00 PM Eastern Time) for system settlement and data processing.
SEC Approves Nasdaq 23-Hour Trading System, Set to Launch on December 6, 2026
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Summary
Nasdaq’s 23-hour trading system (23/5) has been approved by the SEC in a major on-chain news update. The system will go live on December 6, 2026, with the daily market closure reduced to one hour (8:00–9:00 PM ET) for settlement and data processing. This SEC announcement marks a key shift in U.S. market structure.
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