U.S. stock markets reportedly set for 23-hour trading, five days a week, from December 6

Coin Bureau says U.S. stock markets will begin trading 23 hours a day, five days a week, on December 6, 2026. The planned trading week would run from Sunday evening through Friday evening, with a one-hour daily maintenance break. Coin Bureau says brokers will decide which securities and overnight services customers can access, and notes that thinner liquidity could mean wider spreads and greater volatility.