How Many Trading Days in a Year BySteve Burns DEC 13, 2021 Click here to get a PDF of this post How many trading days are there in a year? The NYSE and NASDAQ are open for stock trading an average of approximately 253 trading days a year. This is calculated from the 365.25 days on average per year multiplied by 5/7 for the proportion of trading days per week minus 6 weekday holidays and subtract..