1987 "Black Monday" in the USA

Thirty years ago, on October 19, 1987, there was the largest drop in the Dow Jones Industrial Average in its history - by 22.6%. The stock market crash in the US quickly spread around the world. Australian stock exchanges lost 41.8% by the end of October, Canada - 22.5%, Hong Kong - 45.8%, Great Britain - 26.4%. The reasons for the collapse of the indices have not been established, since no crisis phenomena were observed in the American economy.