Black Tuesday
Black Tuesday refers to October 29th 1929 - the Wall Street Crash - which saw several days of sharp declines amplified by heavy selling driven by margin calls. It put an end to a speculative, multi-year bubble. The stock market continued to fall before reaching a bottom in mid-November. After a short rally between mid-November 1929 and April 1930, the market entered a bear phase that lasted until July 1932.