Largest Day % Losses S&P 500
Oct 19, 1987: -20.4%
Oct 28, 1929: -12.3%
Oct 29, 1929: -10.1%
Nov 6, 1929: -9.9%
Oct 18, 1937: -9.2%
Oct 15, 2008: -9.0%
Dec 1, 2008: -8.9%
July 20, 1933: -8.8%
Sep 29, 2008: -8.7%
July 21, 1933: -8.7%
Oct 26, 1987: -8.2%
*2018, Not 1 in top 20