... 17 of À4.71 percent (volume of 9,431,870,400 shares).Figure 2.Daily volume of S&P 500shares October 1, 1987September 30, 200 1Figure 3.Daily volume of S&P 500shares 1st October, 200 1November ... dramatic spikeRAF8,2128in volume of trading on October 19 and 20, 1987. On these two days the volume of trading (as measured by number of shares traded) was 604,300,032 and 608,099,968,respectively, ... 30, 200 8, and a Post-July 200 8 period, which covers the period from August 1, 200 8S toNovember 30, 200 8; October 19 and October 16, 1987 rank 1st and 11th, respectively on thePre-August 200 8...