Is the U.S. stock market’s 23-hour trading countdown on? Nasdaq will officially launch 23-hour trading on December 6
In its latest published “Global Trading Hours FAQ,” Nasdaq has, for the first time, clearly set the target go-live date for 23-hour U.S. stock trading as December 6, 2026. The security information processing system (SIP) and related supporting SEC rule changes are being finalized. Asian and European investors will be able to trade U.S. stocks directly during local daytime for the first time, without having to stay up late every night.
Under the plan, Nasdaq will add an overnight trading session from 9:00 p.m. to 4:00 a.m. the next day, on top of the existing trading hours of 4:00 a.m. to 8:00 p.m. Eastern Time. The market will pause for one hour every night from 8:00 p.m. to 9:00 p.m. for clearing, data processing, and the trading-day rollover. Trades completed between 9:00 p.m. and midnight will be counted toward the next trading day.
However, there are special characteristics to overnight trading. Nasdaq has clearly stated that during the overnight session it will not support market orders without price, opening orders, closing orders, and certain linked orders. Orders that have not been executed by 4:00 a.m. will also be canceled. Overnight trading may also face issues such as thinner liquidity, wider bid-ask spreads, and increased price volatility.
In its latest published “Global Trading Hours FAQ,” Nasdaq has, for the first time, clearly set the target go-live date for 23-hour U.S. stock trading as December 6, 2026. The security information processing system (SIP) and related supporting SEC rule changes are being finalized. Asian and European investors will be able to trade U.S. stocks directly during local daytime for the first time, without having to stay up late every night.
Under the plan, Nasdaq will add an overnight trading session from 9:00 p.m. to 4:00 a.m. the next day, on top of the existing trading hours of 4:00 a.m. to 8:00 p.m. Eastern Time. The market will pause for one hour every night from 8:00 p.m. to 9:00 p.m. for clearing, data processing, and the trading-day rollover. Trades completed between 9:00 p.m. and midnight will be counted toward the next trading day.
However, there are special characteristics to overnight trading. Nasdaq has clearly stated that during the overnight session it will not support market orders without price, opening orders, closing orders, and certain linked orders. Orders that have not been executed by 4:00 a.m. will also be canceled. Overnight trading may also face issues such as thinner liquidity, wider bid-ask spreads, and increased price volatility.