I've always wondered about 90% down volume days, so I did a little fiddling around with Excel. What I found is pretty interesting: [1] Twenty of Thirty-Five previous 90% down volume days since 1986 have occurred since the bubble burst. [2] Prior to the big pop, the following day was generally negative. Since then it is generally positive. Here's a picture: <img src=http://home.earthlink.net/~augieboodicators/internals/90percentdowndays.png>