The 1929 U.S. stock-market crash day of October 29 is known as Black Tuesday.
Black Tuesday was the most famous day of the Wall Street Crash of 1929. On that Tuesday, investors traded millions of shares as confidence collapsed and prices plunged on the New York Stock Exchange. It followed Black Thursday on October 24 and Black Monday on October 28.
The crash did not by itself cause the entire Great Depression, but it intensified financial distress. Falling share prices damaged investors, banks, businesses, and households, while reduced lending and spending helped deepen the economic downturn. The market had risen rapidly during the 1920s, encouraging speculation and purchases made with borrowed money.
Black Tuesday is sometimes confused with Black Monday, the previous trading day, or Black Thursday, the first major panic day. Together, these dates describe the dramatic sequence rather than separate unrelated crashes.