Overview

The number of active trading days per year varies based on a number of factors. The number matters because the number of trading days per year is used in volatility modeling, option pricing, and other quantitative financial metrics.

252 is the median number of trading days per year in U.S. markets from 2010 to 2022. But that is not the number every year.

Why the Number of Trading Days per Year Changes

The number of trading days per year varies based on how holidays align with weekends, but also major events can cause the markets to close. Past major events include:

  • U.S. markets closed for 4 days following the terrorist attacks on September 11, 2001
  • Markets were closed for 2 days in 2012 following Hurricane Sandy
  • In 2018, markets were closed December 5 after former president George H.W. Bush died

Holidays Per Year (2010 - 2022)

Year Trading Days Closures (Not including half-days)
20222528
20222528
20212529
20202539
20192529
201825110
20172519
20162529
20152529
20142529
20132529
201225011
20112528
20102529