"Stock market" is the common term used to describe two major equity exchanges in the United States -- the New York Stock Exchange and the NASDAQ. The actual number of open days for the market varies from year to year, based on the number of weekdays and the potential for unexpected closings. However, a look at holiday schedules and typical weekdays in a year offers some perspective.

Open Day Estimate

The market is closed on weekends. In the 2014 calendar year, there are 261 weekdays. Thus, it is reasonable to estimate about 260 weekdays for a typical year. The NYSE Euronext website notes nine holidays for which the markets close. This would lower the potential open days to around 250. However, some weekend holidays negate the market closing, such as when Christmas Day falls on a Sunday. Generally, though, the market is open for around 250 days, or slightly more, each year.