Nasdaq to Cancel U.S. Trades Moving More Than 60% Before Plunge

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Nasdaq OMX Group Inc. said it will cancel stock trades on all exchanges that were more than 60 percent above or below prices at 2:40 p.m. New York time, just as U.S. equities plummeted.

The Dow Jones Industrial Average plunged almost 1,000 points before trimming its drop and ended down 347.80 points, or