I've seen much worse figures cited than the ones below. Real world studies always conclude that the average investor stinks to high hell. Mostly that's because performance is screwed if one misjudges even one peak or valley. Buffett and Munger can go on for hours about the futility of market timing.
Have a good Thanksgiving Janice and everybody.
"Dalbar has it figured that the typical small investor underperformed the S&P 500 by 4.32% a year over the past two decades."