October 24, 1929, the first major selling day of the Wall Street Crash, was nicknamed Black Thursday.
The day began with heavy selling on the New York Stock Exchange after weeks of market weakness. The Dow Jones Industrial Average fell sharply, and trading volume reached a then-record level. A group of major bankers later intervened by buying stocks, helping the market recover much of its intraday loss.
Black Thursday was followed by further dramatic sessions. October 28 became known as Black Monday, while October 29 became Black Tuesday, when the Dow suffered another severe decline. These dates are sometimes confused because all three were part of the same broader crash.
The 1929 collapse did not cause the Great Depression by itself, but it damaged confidence, reduced wealth, and intensified existing economic problems. The crash unfolded over several years, with the Dow eventually reaching a much lower point in 1932.