Jeffrey Hirsch, CEO of Hirsch Holdings and publisher of the Almanac Trader, posted on X that the S&P 500 has experienced declines on eight out of thirteen Friday the 13th days in February since 1930, with an average loss of 0.05%. In February 2015, the index saw a slight increase of 0.41%, despite having fallen on six of the previous seven occurrences. This pattern is likely attributed to the timing of Friday the 13th, which often coincides with the historically weak period around Presidents’ Day, rather than any superstition.