Uncategorized CRASH OF 87: By The Numbers By Editorial Staff - October 18, 2012 ShareTweetShare 1 of 16 SOURCES: Jeremy J. Siegel, Wharton School; Points and Figures; Securities Industry and Financial Markets Association, Wikimedia Commons Opening value of the Dow Jones Industrial Average Closing value of the Dow. The decline, which still ranks as the largest percentage drop in one day. Loss of market value, in billions. The amount of shares traded on the New York Stock Exchange, in millions. The Dow on August 25, 1987. The drop from August 25 to October 19. Value of a S&P 500 stock index futures contract on August 25. ShareTweetShare