Monday 19 Oct 1987 was a big crash (today is Monday, October 19)

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In finance, Black Monday refers to Monday, October 19, 1987, when stock markets around the world crashed, shedding a huge value in a very short time. But if you look at the dates of the 10 worst crashes you will se they occurred May, September, October, January February, March, so October is not necessarily an bad omen month