Black Tuesday, the 1929 Wall Street Crash's biggest one-day selling wave, occurred on October 29, 1929.
The date followed Black Thursday on October 24 and Black Monday on October 28. On Black Tuesday, roughly 16 million shares changed hands on the New York Stock Exchange, overwhelming the market's ability to process orders smoothly. Share prices fell sharply as investors rushed to sell.
The crash did not by itself create the entire Great Depression, but it became its most famous financial symbol. The United States economy was also weakened by falling demand, bank failures, debt, and reduced investment. The market's broader decline continued after October 1929, reaching a much lower point in 1932.
Black Tuesday is sometimes confused with Black Thursday, the first dramatic break in the 1929 episode. Both dates were important, but October 29 is the standard answer for the crash's climactic selling day.