⁍ In 1929, sharp drops on October 24 and 29 contributed to a -19.7% decline for the month.

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⁍ In 1987, October 19’s -20.5% decline was the biggest single-day drop ever.

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⁍ October 2008 didn’t have a single awful day, but a smattering of routs drove US stocks’ -16.8% decline for that month.

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– It’s that time of year again: time for investors to start bracing for the stock market’s worst month of the year, or at least the worst month of the year for stocks. The S&P 500 has fallen an average of 0.6% in October over the past three years, which the Wall Street Journal notes is the worst three-month stretch since the depths of the Great Depression. The last time it was this bad was in 2008, when it was down 16.8% for the month. The last time it was this bad on two separate days was in 1929, when it was down 19.7% for the month. The last time it was this bad on all three days was in 1987, when it was down 21.5%. The last time it was this bad on all three days was in 2008, when it was down 16.8%. The last time it was this bad on all three days was in April 2011, when it was down 14.5%. The last time it was this bad on all three days was in October 2007, when it was down 17.6%. The last time it was this bad on all three days was in October 2011, when it was down 14.5%. The last time it was this bad on all three days was in October 2007, when it was down 17.6%. The last time it was this bad on all three days was in October 2008, when it was down 16.8%. The last time it was this bad on all three days was in October in 2011, when it was down 14.5%.