The 1987 stock-market crash was called Black Tuesday in Australia, where the All Ordinaries fell sharply.
The worldwide crash began in October 1987, with major markets recording extraordinary losses over several trading sessions. Because markets operate in different time zones, the same global event received different day names in different countries. In the United States, the most famous session was Black Monday, 19 October 1987. Australian reporting commonly referred to the corresponding local-market turmoil as Black Tuesday.
Australia’s All Ordinaries index fell heavily during the crash, reflecting the international flow of selling and the close connections among financial markets. The episode was not caused by one universally accepted factor. Analysts have cited overvalued shares, interest-rate concerns, computerized trading, portfolio insurance, and cross-border contagion. The differing labels are a useful reminder that calendar dates and market names can vary by country even during one global crash.