When I looked at this, and ran my primitive simulations, I decided that it really, really, mattered when you were born. 70 year averages, or 140 year averages,

When I looked at this, and ran my primitive simulations, I decided that it really, really, mattered when you were born. 70 year averages, or 140 year averages, matter very little when markets and economies turn on spans of decades. I mean, we know that if you put a bundle in the market in 1980, you did pretty well. you did the same in 2000, not so much. No average can make that easier. edit: put differently, none of us live long enough to benefit from 140 year averages