The Dow Jones Industrial Average reached its low during the 1929 crash on July 8, 1932.
The index closed that day at 41.22, roughly 89% below its record close of 381.17 on September 3, 1929. The decline was not a single event: selling began in October 1929, but the bear market continued through the early years of the Great Depression.
The 1932 low is often used as the endpoint of the classic Wall Street Crash, although the broader economic depression continued for years. The Dow did not regain its September 1929 closing high until November 1954.
A common mix-up is confusing the market’s 1932 low with the 1929 crash’s most famous trading dates. Black Thursday occurred on October 24, 1929, and Black Tuesday followed on October 29, but the index kept falling long afterward.