Friday the 13th

Friday the 13th

September 13, 2019

September 13, will be the first Friday the 13th since July 2018. For most people, this is just another day, unless you suffer from triskaidekaphobia—the fear of the number 13. A fear of the actual day of Friday the 13th is called paraskevidekatriaphobia or friggatriskaidekaphobia.

This Friday, though, is a little more unusual, even for a Friday the 13th. This will be the first Friday the 13th to take place on a full moon since October 13, 2000. The Farmer’s Almanac says this is a rare occurrence and won’t happen again until August 13, 2049.

We also haven’t had a Friday the 13th for 427 trading days, tying the all-time record of trading days without a Friday the 13th that was set in September 1929. For those scoring at home, that was when stocks peaked and soon went into the Great Depression.

Fortunately, the unlucky nature of Friday the 13th hasn’t tripped up U.S. stocks in the past. As shown in the LPL Chart of the Day, the S&P 500 Index does pretty well when a Friday the 13th takes place during September, a historically weak month.


“Unless you see a black cat or break a mirror this Friday, we don’t think this one day means anything more than your average day,” said LPL Research Senior Market Strategist Ryan Detrick. “Still, this is a fun one to look at, and if you do happen to break a mirror on Friday …”

Happy Friday the 13th everyone!


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The modern design of the S&P 500 stock index was first launched in 1957. Performance back to 1928 incorporates the performance of predecessor index, the S&P 90.

This Research material was prepared by LPL Financial, LLC.

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