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Black Monday

Black Monday
10/19/1987 AD crashed

Infamous stock market crash that represented the greatest one-day percentage decline in U.S. stock market history, culminating in a bear market after a more than 20% plunge in the S&P 500 and Dow Jones Industrial Average.

Among the primary causes of the chaos were program trading and illiquidity, both of which fueled the vicious decline for the day as stocks continued lower even as volume grew lighter.

Today, circuit breakers are in place to prevent a repeat of Black Monday. After a 7% drop, trading would be suspended for 15 minutes, with the same 15 minute suspension kicking in after a 13% drop. However, in the event of a 20% drop, trading would be shut down for the remainder of the day.

New York City, NY
Lattitude: 40.7128° N
Longitude: 74.006° W
Region: North America
North America
Modern Day United States
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