Today marks the twentieth anniversary of Black Monday, the biggest one-day stock market plunge in history. On October 19, 1987, Bay Street was shocked to see all the key market indices plummet. The TSE 300 lost over 400 points as, in a frenzy of panicked selling, a record 77 million shares were desperately traded on the floor of the Toronto Stock Exchange. By day's end, hundreds of millions of dollars evaporated from share values, including......