Stocks: Crude's Surge Rattles Nerves

The market has seen some sloppy price action in recent weeks. S&P says stay with mid-caps, including energy and materials stocks

Last week was fairly quiet until Thursday and Friday, when all hell broke loose. Stocks, crude oil, and bond yields surged on Thursday -- try to figure that one out -- only to see crude oil continue its surge Friday, with stocks and bond yields giving up all of their moves from the day before.

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