Black Tuesday was the catastrophic trading day during the 1929 Wall Street Crash that followed Black Thursday.
Black Tuesday occurred on October 29, 1929, when approximately 16 million shares changed hands on the New York Stock Exchange. Stock prices plunged, wiping out enormous amounts of paper wealth and deepening public fears about the economy.
The crash did not by itself cause the entire Great Depression, which developed through several interacting economic and financial problems. The earlier Black Thursday, October 24, saw heavy selling and a temporary effort to support prices. Black Monday, October 28, brought another severe decline before Black Tuesday produced the most famous climax of the episode.