Simplify the following text for a Grade 5 native English-speaking person.
Original: The Wall Street Crash of 1929 ( October 1929 ) , also known as the Great Crash , and the Stock Market Crash of 1929 , was the most devastating stock market crash in the history of the United States , taking into consideration the full extent and duration of its fallout .
Simplified: The Wall Street Crash of 1929 was a stock market crash on the New York Stock Exchange on October 29 , 1929 .