The Nasdaq 23 hour trading system has been approved by the SEC and will be launched on December 6, 2026

According to Nasdaq's Q1 2026 financial report and 8-K filing with the SEC, the Nasdaq 23 Hour Trading System (23/5) has been approved by the US Securities and Exchange Commission (SEC) and will be officially launched on December 6, 2026. At that time, the US stock market will only be closed for one hour per day (20:00-21:00 Eastern Time) for system clearing and data processing.