hey so i wanted to answer your question reallly quick so ya.
Black Tuesday
Updated September 10, 2019
What was Black Tuesday?
Black Tuesday refers to October 29, 1929, when panicked sellers traded nearly 16 million shares on the New York Stock Exchange (four times the normal volume at the time), and the Dow Jones Industrial Average fell -12%. Black Tuesday is often cited as the beginning of the Great Depression
This is from a website that talks all about it u can just type that in your on words
Or u could just use those online rewording things