U.S. stocks open lower after two days of gains

U.S. stocks opened slightly lower on Thursday, as lower oil prices and weaker-than-expected economic data sapped investor confidence. The S&P 500 opened 2 points, or 1%, lower at 1,984. The Dow Jones Industrial Average slipped 13 points, or 0.1%, to 16,884. Meanwhile, the Nasdaq Composite began the day down 7 points, or 0.1% at 4,696.

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