A lot of smart money pays more attention to the S&P than the DOW. And that money has it pegged at a 600 point S&P before jumping back in because then the risk is considered minimal.
Index investing isn't "sexy" enough for some people. But, it just works.
The amount of money made was a staggering figure.
*Then* the article analyzed what would happen if you had just missed the 10 best days, over the course of that 80 or so years. You'd still be way ahead, but would be on a beer budget, not on lobster and caviar.
Moral to the story? Unless you need the money, stay in the market.