The Risk of Being Out of the Game

In 2014, JPMorgan Asset Management did a study and discovered that the 40 best days accounted for more than the entire S&P 500 return from 1993–2013. In other words, if someone traded only on these specific 40 days, i.e., invested his money in S&P 500 in the morning and sold in the evening then he would have the same returns as someone who stayed invested for 20 years.