The worst day in stock market history wasn't 1929. Here are the 10 biggest S&P 500 drops on record
Black Monday's 20.47% drop in 1987 still tops the list, and 2020 is the last year to make it. See the 10 worst S&P 500 days on record
We haven't written up this one. Quartz has the full story — the link below goes straight to it.