What was the name of the 1873 Vienna Stock Exchange crash day?

The 1873 Vienna Stock Exchange crash day was known as Black Friday. The collapse occurred on May 9, 1873, when panic selling ended a speculative boom in Austria-Hungary.

The crash followed rapid expansion and speculation in railways, property, and companies connected with industrial growth. Many investors had expected prices to keep rising, but confidence broke at the Vienna Stock Exchange. The failure of several firms spread fear through the financial system and helped trigger the broader Panic of 1873.

The crisis soon affected Germany, the United States, and other economies. In the United States, the failure of the investment firm Jay Cooke & Company in September 1873 helped turn financial stress into a major banking panic. “Black Friday” here refers to the Vienna event, not the later retail-shopping term.