Black Tuesday, the 1929 U.S. stock-market crash day, occurred on October 29, 1929. The Dow Jones Industrial Average fell about 12%, as investors rushed to sell shares amid panic and weakening confidence.
The day followed Black Thursday, October 24, and Black Monday, October 28. These sessions formed the most famous sequence of the Wall Street Crash, although the market continued falling after October 29. The Dow eventually reached a low in July 1932.
A common mix-up is treating Black Tuesday as the entire crash. It was one especially dramatic trading day within a longer collapse. The crash also became an important symbol of the wider economic crisis that developed into the Great Depression, though historians do not regard the stock-market collapse alone as its only cause.
The New York Stock Exchange was the central trading venue involved, and the crash affected international confidence as well as American investors.