23-hour trading in US stocks is reportedly scheduled to begin in December 2026, making trading during the daytime in Japan possible. SBI Securities also plans to support the service, expanding trading opportunities for individual investors.
The “23-hour trading” service, which will extend trading hours for US stocks, is reportedly scheduled to launch locally in December 2026. This is expected to extend trading beyond regular-market hours to include pre-market, after-hours and overnight sessions.
At present, regular-market hours in the US fall during Japan’s nighttime in winter. Once 23-hour trading begins, trading is expected to be available from 11:00 a.m. Japan time until 10:00 a.m. the following day, creating more opportunities to trade US stocks during the daytime in Japan.
Potential uses include more opportunities to trade while monitoring volatility after earnings announcements, timely responses to the release of key indicators such as US employment data and CPI, and flexible trading based on news. One anticipated approach is to review news and earnings announcements in the morning in Japan and consider trades during the Japanese daytime.
Risks have also been identified, including the possibility that trades may be harder to execute and that prices may move sharply. There may be fewer participants during overnight hours, requiring attention to changes in liquidity.