<P> The Wall Street Crash of 1929 , also known as Black Tuesday ( October 29 ) , the Great Crash , or the Stock Market Crash of 1929 , began on October 24 , 1929 ( `` Black Thursday '' ) , and was the most devastating stock market crash in the history of the United States ( acting as the most significant predicting indicator of the Great Depression ) , when taking into consideration the full extent and duration of its after effects . The crash , which followed the London Stock Exchange 's crash of September , signalled the beginning of the 12 - year Great Depression that affected all Western industrialized countries . </P>
what was the wall street crash in 1929
the most devastating stock market crash in the history of the United States ( acting as the most significant predicting indicator of the Great Depression ) , when taking into consideration the full extent and duration of its after effects