During the Wall Street Crash of 1929, which October date became known as Black Tuesday?

During the Wall Street Crash of 1929, Black Tuesday was October 29, 1929.

On that day, roughly 16 million shares changed hands on the New York Stock Exchange, a record at the time. Prices plunged as investors rushed to sell, following severe declines on Black Thursday, October 24, and Black Monday, October 28.

The crash did not by itself cause the Great Depression, but it became its most famous financial symbol. The wider economic collapse also involved bank failures, falling production, deflation, and high unemployment. A common mix-up is treating Black Tuesday as the entire crash; historians usually describe the market collapse as a sequence of violent trading days in October 1929.