The opening hours of the US stock market are something that Asian investors need to think through carefully. In particular, you should pay close attention to the switch between daylight saving time and standard time, because even a small time difference can easily lead to confusion.

The regular trading session in Eastern Time runs from 9:30 to 16:00, Monday through Friday. However, if you’re monitoring the market from Australia, you’ll need to look at it from another angle. When the US stock market opens in Australia, it’s roughly in the evening to around midnight—exactly when depends on whether it’s daylight saving time or standard time. Currently, the US is observing daylight saving time, which corresponds to 21:30 to 4:00 the next day in China time.

The NYSE, Nasdaq, and the American Stock Exchange are basically synchronized in their opening and closing, but they operate independently, so prices may differ slightly. If you want to trade pre-market or after-hours, pre-market is from 4:00 to 9:30, and after-hours is from 16:00 to 20:00—these times are all in Eastern Time.

What’s most interesting is that the NYSE is considering extending the trading hours of NYSE Arca. If approved, trading could run for up to 22 hours each business day, which would be a significant change for global investors.

Beyond US stocks, major stock markets worldwide are also worth keeping an eye on. The Tokyo Stock Exchange, the London Stock Exchange, the Hong Kong Stock Exchange, the Australian Securities Exchange, and others all have their own opening and closing times. Especially if you invest from Australia, being able to follow both US stocks and local Australian stocks means you’ll need to plan your time even more carefully.

You should also watch for a range of US stock market holidays. In 2026, markets will be closed or will have early closes for New Year’s Day, Martin Luther King Memorial Day, and Independence Day, so be sure to plan your trading strategy in advance—don’t get caught off guard by the holidays.