On October 19, 1987, the Dow Jones Industrial Average fell 22.6%, a record based on a percentage sell-off in the market’s history. It plunged 508 points to 1,738. A similar drop today would shave 8,000 points off the DJIA.

The early market carnage in 1987 looked something like this last Thursday and Friday. The Dow sold off 2.4% on the Thursday before Black Monday and 4.6% on Friday. (The drop began Wednesday, as the Dow fell 3.8% that day.)

The effort to sell stocks on Monday, October 19, was so extreme that 11 stocks in the DJIA opened late, and 95 stocks in the S&P 500 did the same.