Academic finance is devoted to finding the mathematically optimal investment strategies. My own theory is that, in the real world, people do not want the mathematically optimal strategy. They want the strategy that maximizes for how well they sleep at night.

How much money would these three investors end up with over time? Sue ends up with $435,551. Jim has $257,386. Tom $234,476. Sue wins by a mile. There were 1,428 months between 1900 and 2019. Just over 300 of them were during a recession. So by keeping her cool during just the 22% of the time the economy was in or near a recession, Sue ends up with