The most famous Tuesday trading day of the 1929 U.S. stock-market crash was Black Tuesday.
Black Tuesday occurred on October 29, 1929, when approximately 16 million shares changed hands on the New York Stock Exchange. The Dow Jones Industrial Average fell about 12%, adding to the severe losses recorded during the preceding week. The selling reflected panic, forced liquidation, and widespread fear that share prices had risen far beyond sustainable levels.
The crash did not by itself create the entire Great Depression, but it became its defining financial symbol. Banks failed, investment contracted, and unemployment rose sharply during the years that followed. The economic downturn had multiple causes, including weak demand, debt, banking problems, and international monetary pressures.
A common mix-up is confusing Black Tuesday with Black Thursday, October 24, 1929, the first dramatic collapse in that week. Black Monday is generally associated with the 1987 crash, not the 1929 event.