Nasdaq Cancels Trades From Crazy 20 Minutes Swings of over 60% will be wiped out By Rob Quinn, Newser Staff Posted May 7, 2010 3:09 AM CDT 4 comments Comments The Dow Jones plunged by nearly a thousand points yesterday before finishing down 347.80. (AP Photo/Mark Lennihan, file) (Newser) – Nasdaq plans to wipe some of yesterday's wildest stock market activity from the books. The stock exchange operator is canceling trades of 286 stocks that went up or down by over 60% in the 20 minutes beginning at 2:40 pm, Reuters reports. The shares affected include Accenture, which fell by more than 99% to a penny before rebounding to close at $41.09. The decision to cancel the trades can't be appealed, said Nasdaq officials.