So something I've been thinking about: Living people enter the market when they make money, and they do that in a correlated way (times of high employment). And

So something I've been thinking about: Living people enter the market when they make money, and they do that in a correlated way (times of high employment). And they exit the market in a correlated way to spend on retirement or college or whatever. Entering and exiting when everyone else do means you get a bad price.