crash

The Wall Street Crash of 1929, also known as the Great Crash, was a major American stock market crash that occurred in the fall of 1929. It started in September and ended late in October, when share prices on the New York Stock Exchange collapsed.
It was the most devastating stock market crash in the history of the United States, when taking into consideration the full extent and duration of its aftereffects. The crash, which followed the London Stock Exchange's crash of September, signaled the beginning of the Great Depression.

View More On Wikipedia.org