It might do but I dont think it will be a direct result of non-terrorist activity. Some stockmarket cycles are forecast to start turning up around the 11th and have been for quite a few weeks. To quote "The 30-day cycle is now 19 days along and is now seen as bearish, next due for a low near September 11, 2003."
That is from todays update from http://www.cycle-wave.com
who have been very accurate recently. If only I had held my spx long from 2 weeks ago at 993...