What name is given to the 1929 Wall Street crash day when the Dow fell nearly 13%?

The 1929 Wall Street crash day when the Dow Jones Industrial Average fell nearly 13% was called Black Tuesday.

Black Tuesday occurred on October 29, 1929, after heavy selling had already struck the New York Stock Exchange on Black Thursday, October 24, and Black Monday, October 28. More than 16 million shares changed hands that day, a record at the time. Prices collapsed as investors rushed to sell.

The crash did not single-handedly cause the Great Depression, but it became its best-known financial symbol. The economy was already vulnerable because of weak agriculture, excessive borrowing, unequal income distribution, and industrial overproduction. Bank failures, falling investment, and shrinking consumer demand deepened the downturn during the following years.

A common mistake is to treat Black Tuesday as the entire 1929 crash. It was the most famous day in a sequence of turbulent sessions. The Dow eventually fell about 89% from its September 1929 peak to its 1932 low, illustrating how a short panic became a long bear market.