What was the nickname of the October 29, 1929 U.S. market collapse?

The October 29, 1929 U.S. market collapse was known as Black Tuesday.

On that day, approximately 16 million shares changed hands on the New York Stock Exchange, a record at the time, as investors rushed to sell. The Dow Jones Industrial Average fell sharply, extending the market’s collapse after the earlier panic associated with Black Thursday on October 24 and Black Monday on October 28.

Black Tuesday did not by itself cause the entire Great Depression. The depression resulted from several interacting forces, including banking failures, reduced spending, debt problems, deflation, and weakened international trade. Nevertheless, the crash became its most recognizable financial symbol.

Black Tuesday is often confused with Black Thursday, which came first in the sequence of 1929 sell-offs. The nicknames describe particular trading days, while the Wall Street Crash refers to the broader market collapse from 1929 into the early 1930s.