Stocks Finish Mixed

A robust earnings report from Google lifted tech stocks, but Caterpillar's weak outlook hurt blue chips

Stocks finished mixed on Friday, as a robust earnings report from Google (GOOG ) boosted the tech sector but a weak outlook from Caterpillar (CAT ) hurt blue chips. Trading was volatile, reflecting a lack of consensus about the near-term outlook and activity related to the monthly options expiration, says Standard & Poor's MarketScope.

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