With the exception of 2002 and 2009, daily returns have been positive on every 9/11 anniversary when the stock market was open. Many such statistics involve an

With the exception of 2002 and 2009, daily returns have been positive on every 9/11 anniversary when the stock market was open. Many such statistics involve an element of randomness. We tend to take for granted that this pattern is statistically significant, but in reality, the dataset is too small.…