The New York Stock Exchange is formed.

The New York Stock Exchange is founded.

The New York Stock Exchange opens its first permanent headquarters at 10-12 Broad near Wall Street in New York City.

World War I: Following a war-induced closure in July, the New York Stock Exchange re-opens for bond trading.

Great Depression: After a steady decline in stock market prices since a peak in September, the New York Stock Exchange begins to show signs of panic.

"Black Thursday" stock market crash on the New York Stock Exchange.

The New York Stock Exchange crashes in what will be called the Crash of '29 or "Black Tuesday", ending the Great Bull Market of the 1920s and beginning the Great Depression.

Great Depression: In an effort to restore investor confidence, the New York Stock Exchange unveils a fifteen-point program aimed to upgrade protection for the investing public.

October 27, 1997 mini-crash: Stock markets around the world crash because of fears of a global economic meltdown. The Dow Jones Industrial Average plummets 554.26 points to 7,161.15. For the first time, the New York Stock Exchange activates its "circuit breakers" twice during the day eventually making the controversial move of closing the Exchange early.

The New York Stock Exchange reopens for trading after the September 11 Attacks, the longest closure since the Great Depression.