Based on our calculations-to-the-day for the 12 calendar years of 2016–27, the number of tradingdays in a year varies between 250 and 253. However, this period of time includes 2022, the first year a new federal holiday went into effect. · While the average is around 252 trading days per year, the exact number varies year to year depending on weekends, holidays, and occasional special closures. In 2025, U.S. markets are expected to have 250–251 trading days, varying with the number of half-day sessions. · How Many Open TradingDays a Year? Understanding the rhythm of the financial markets is crucial for anyone involved in trading or investing. Whether you’re trading stocks on the NYSE, NASDAQ, or another U.S. exchange, you’ll generally encounter 250 to 253 stock trading days per year. This excludes weekends and federal holidays when markets are closed. · Weekends and certain holidays are excluded, which shrinks the total significantly. So, How Many Trading Days Are in a Year? On average, there are about 252 trading days in a typical U.S. calendar year. But the exact number can vary slightly from one year to the next. · Learn how to calculate the number of trading days in a year and why it varies from year to year. Find out the factors that affect the trading schedule, such as holidays, weekends, events, and leap years. · There are 252 tradingdays in a calendar year. How many hours are there in a trading day? The stock market is open from 9:30 am to 4:00 pm EST. That means there are 6 1/2 hours in a trading day. Quick Takeaways. Prime trading time is the first 15 minutes following the opening bell.