Some have suggested that the problem was when the quotes were timestamped. http://www.nanex.net/FlashCrash/FlashCrashAnalysis_NBBO.html http://www.nanex.net/Fl

Some have suggested that the problem was when the quotes were timestamped. http://www.nanex.net/FlashCrash/FlashCrashAnalysis_NBBO.html http://www.nanex.net/FlashCrash/FlashCrashAnalysis_NBBO.html I don't really understand how you could abuse an exchange through quote stuffing - I've heard(and it seems reasonable to me) that they would use round robin queues to protect from exactly this sort of thing.