Which date marks the Hong Kong stock exchange's Black Monday during the 1987 global crash?

Hong Kong's stock exchange experienced its Black Monday on October 19, 1987, during the global market crash.

The Hang Seng Index fell sharply as international selling spread across time zones. Trading was suspended in Hong Kong for several days after the crash, and the exchange reopened on October 26. The interruption reflected concerns about market disorder and the need to process unsettled transactions.

The crisis was international rather than confined to New York. Markets in Europe, Australia, Canada, and elsewhere also recorded steep losses. Hong Kong suffered one of the largest percentage declines among major markets during the episode.

October 19 is also the date of the U.S. Dow's record percentage fall. The same date therefore appears in accounts of both markets, but the indices, trading rules, and percentage losses were different.