"The definitive account of the crash of 1987, a cautionary tale of how the U.S. financial system nearly collapsed ... Monday, October 19, 1987, was by far the worst day in Wall Street history. The market fell 22.6 percent--almost twice as bad as the worst day of 1929--equal to a loss of nearly 5,000 points today. But Black Monday was more than just a one-day market crash; it was seven years in the making and threatened the entire U.S. financial system....