Having read a Lowry story on this some time ago... I recall they reference each stock's daily change, multiply that by the number of shares traded, then add them all up for NYSE stocks, ALL stocks? Is this the % numbers you're indicating here? Are you getting this info from somewhere or doing all the legwork yourself? Tks.
Russell 3000 82% down volume (including worldcom) 92.6% down points SP-500 85.7% down volume 98.7% down points It is a simple formula. Volume up or volume down/(volume up + volume down). Same for points. Ignore issues unchanged for the day. I do it myself.
July 11: SP500 53.60% up points 71.77% up volume Russell 3000 (including worldcom) 38% up points 61.9% up volume
Yes Lowry's does the NYSE, and my eod database does not have that collection so I do the Russell 3000 to get an equivalent broad based sample. But since the SP-500 is also such widely followed index to which so much investment capital is devoted, I am extending the Lowry study to this index to see if it also can provide warnings. I corresponded with Paul Desmond on this idea and he thought it was very good.
No 90% today, I think. I'll run the numbers later and post them, but the blip up into the close I beleive put the volume% at about 85% down. It was close to 90% down volume at 3:45- 3:50 The SP-500 probably had a complete 90% down day.