Stock market crash of 1929 Stock market crash of 1930 1930 the great depression The Wall Street Crash of 1929, also known as the Great Crash, was a major stock market crash that occurred in 1929. It started in September and ended late in October, when share prices on the New York Stock Exchange collapsed. On October 24, "Black Thursday", the market lost 11 percent of its value at the opening bell on very heavy trading. On October 28, "Black Monday,"[10] more investors facing margin calls decided