2025 US Stock Market Hours: NYSE·NASDAQ·AMEX Regular Trading·Pre-market·After-hours Complete Guide (Including Korea Time Conversion Chart)

Why Are U.S. Stock Market Hours So Complicated?

To invest in U.S. stocks, the first challenge you need to solve is understanding the exact trading hours. U.S. stock market hours are much more complex than you might think. They include daylight saving time adjustments, a time difference of over 13 hours with Korea, and the existence of pre-market and after-hours trading outside regular hours. Misunderstanding these times can lead to missed trading opportunities or unexpected losses. In this article, I will provide a comprehensive overview of U.S. stock market hours, including the characteristics of each exchange, holiday schedules for 2025, and a time conversion chart based on Korea time.

Understanding the 3 Major U.S. Stock Exchanges

Before diving into U.S. stock market hours, it’s helpful to understand the characteristics of each exchange to plan your trades more effectively.

NYSE( New York Stock Exchange): The Heart of the U.S. Market

Founded in 1792, the NYSE is the world’s largest stock exchange. It lists approximately 2,400 companies with a total market capitalization of about $23 trillion. Major blue-chip stocks like Berkshire Hathaway, Johnson & Johnson, and Visa are primarily traded here. This is the benchmark exchange when discussing U.S. stock market hours.

NASDAQ( NASDAQ): The Tech Hub

Established in 1971, NASDAQ is home to many IT and growth stocks. It lists giants like Apple, Microsoft, and NVIDIA, and ranks as the second-largest stock exchange in the world. Many investors watch NASDAQ movements during U.S. stock hours because of its high volatility and tech focus.

AMEX( American Stock Exchange): The Small and Mid-Cap Market

Less well-known than NYSE and NASDAQ, the AMEX is a key venue for mid-sized and small-cap companies. All three exchanges operate within the same U.S. stock hours.

Complete Guide to U.S. Stock Market Hours: Regular, Pre-Market, and After-Hours

Regular Trading Hours (

Eastern Time)EST/EDT(: 09:30~16:00
Korea Time: 23:30~06:00 )During Daylight Saving Time: 22:30~05:00(

This is when the trading volume is highest and volatility is greatest. All three exchanges—NYSE, NASDAQ, and AMEX—operate during these hours. In Korea, trading is available from 11:30 PM to 6:00 AM the next day.

) Pre-Market Trading Hours ###

Eastern Time(EST/EDT): 04:00~09:30
Korea Time: 18:00~23:30 (During Daylight Saving Time: 17:00~22:30)

Pre-market trading occurs before regular hours. Trading volume is low, and volatility can be high, making this a more volatile period within U.S. stock hours.

( After-Hours Trading Hours )

Eastern Time###EST/EDT(: 16:00~20:00
Korea Time: Next day 06:00~10:00 )During Daylight Saving Time: 05:00~09:00(

This is the after-hours session following the close of regular trading. Economic data releases or corporate earnings reports can lead to increased activity during this period.

) U.S. Stock Market Trading Regulations (

All three exchanges trade in U.S. dollars)USD###, with settlement occurring two business days after the trade date. Unlike Korean stocks, there are no price limit bands. Because prices can fluctuate sharply during U.S. stock hours, risk management is essential.

2025 U.S. Stock Market Holidays: Key Dates to Remember

The U.S. stock market does not operate on certain days. The holiday schedule for 2025 is as follows:

• January 1 (Wed): New Year’s Day
• January 20 (Mon): Martin Luther King Jr. Day
• February 17 (Mon): Presidents’ Day
• April 18 (Fri): Good Friday
• May 26 (Mon): Memorial Day
• June 19 (Thu): Juneteenth
• July 4 (Fri): Independence Day
• September 1 (Mon): Labor Day
• November 27 (Thu): Thanksgiving
• December 25 (Thu): Christmas

( Early Market Close: Shortened Trading Hours )

On certain days, the U.S. stock market closes early:

• July 3 ###Thu(: Day before Independence Day → Closes at 02:00 AM Korea time
• November 28 )Fri(: Day after Thanksgiving → Closes at 03:00 AM Korea time
• December 24 )Wed(: Christmas Eve → Closes at 03:00 AM Korea time

Impact of Daylight Saving Time on U.S. Stock Market Hours

Daylight Saving Time (DST) runs from the second Sunday in March to the first Sunday in November. During this period, U.S. stock hours are moved forward by one hour.

Standard Time)November~March(:

• Regular trading: Korea time 23:30~06:00

Daylight Saving Time)March~November(:

• Regular trading: Korea time 22:30~05:00

Missing this change can cause you to miss trading opportunities, so stay alert.

Comparing Global Stock Markets: U.S. Stock Hours vs. Other Markets

If you trade in multiple markets, it’s helpful to know how U.S. stock hours compare to other major exchanges.

Conclusion: The Importance of Mastering U.S. Stock Market Hours

Accurately understanding U.S. stock hours is the first step toward developing an effective trading strategy. Familiarize yourself with the characteristics of regular, pre-market, and after-hours trading, remember the holiday schedule for 2025, and stay updated on daylight saving time changes. Since exchange hours and holidays can change, always verify the latest information. Mastering U.S. stock market hours will give you greater confidence and enable more efficient trading.