Historically, Friday the 13th tends to be a relatively calm day for the stock market, with average gains of only 0.2 percent or less.
In three of the last five instances, all three major averages finished down on Friday the 13th. Should investors take this as a bad omen? Below is a look at how stocks traded on this superstitious day.
Dow since 1900:
S&P since 1928:
Nasdaq Composite since 1971:
And here is a look at the unlucky 13 so far this year: