What are the common pitfalls when trading U.S. stocks? It’s mainly missing the market holidays and knowing the exact trading hours. Especially since there’s a significant time difference with Korea and daylight saving time is also applied, not understanding these properly can mess up your trading plans.

The U.S. stock market is divided into three major exchanges. The New York Stock Exchange has been operating since 1792, making it the largest exchange in the world, with about 2,400 listed companies and a market capitalization of $23 trillion. Major companies like Berkshire Hathaway, Johnson & Johnson, and Visa are mainly traded there. NASDAQ is centered around IT companies, home to tech giants like Apple, Microsoft, and NVIDIA. The American Securities Exchange primarily operates with mid- and small-cap companies.

Now, let’s look at the actual trading hours. All three exchanges follow the same schedule. Regular trading hours are from 9:30 a.m. to 4:00 p.m. Eastern Time, which is 11:30 p.m. to 6:00 a.m. Korea time. From mid-March to early November, when daylight saving time is in effect, the hours are moved forward by one hour, making it 10:30 p.m. to 5:00 a.m.

In addition to regular hours, there are pre-market and after-hours trading. Pre-market runs from 4:00 a.m. to 9:30 a.m. Eastern Time (6:00 p.m. to 11:30 p.m. Korea time), and after-hours from 4:00 p.m. to 8:00 p.m. Eastern Time (next day 6:00 a.m. to 10:00 a.m. Korea time).

Regarding trading regulations, transactions are only conducted in U.S. dollars, and settlement is completed two business days later. An important point is that the U.S. stock market has no price limit rules. Unlike Korea, where trading is restricted during rapid declines, the U.S. market can experience high volatility because there are no limits on price movements.

Be sure to check the U.S. market holidays as well. In 2026, the market will be closed on New Year’s Day (January 1), Martin Luther King Jr. Day (January 19), Presidents’ Day (February 16), Good Friday (April 3), Memorial Day (May 25), Juneteenth (June 19), Independence Day (July 3), Labor Day (September 7), Thanksgiving (November 26), and Christmas (December 25).

Besides holidays, there are days with early market closures. On July 2 (the day before Independence Day), November 27 (the day after Thanksgiving), and December 24 (Christmas Eve), the market closes early at 1 p.m. Eastern Time, which is 2 a.m. Korea time the next day.

If you trade stocks outside the U.S., it’s helpful to know each exchange’s hours. The Korea Exchange operates from 9:00 a.m. to 3:30 p.m., the Tokyo Stock Exchange from 9:00 a.m. to 3:00 p.m. (with a lunch break from 11:30 a.m. to 12:30 p.m.), the London Stock Exchange from 8:00 a.m. to 4:30 p.m. (Korea time 5:00 p.m. to 1:30 a.m. next day, and during daylight saving time from 4:00 p.m. to midnight 30 minutes), the Hong Kong Stock Exchange from 9:30 a.m. to 4:00 p.m. (lunch break 12:00 p.m. to 1:00 p.m.), and the Shanghai Stock Exchange from 9:30 a.m. to 3:00 p.m. (lunch break 11:30 a.m. to 1:00 p.m.).

In conclusion, understanding the U.S. market holidays and precise trading hours is the first step toward successful trading. Market operating hours and holidays can change, so always check the latest information. If you’re planning to invest in U.S. stocks, start by organizing these basic details.