U.S. stocks open lower as oil prices slump

U.S. stocks opened slightly lower on Monday as a slump in oil prices weighed on energy shares. The S&P 500 opened 4 points, or 0.2%, lower at 1,902. The Dow Jones Industrial Average fell 33 points, or 0.2%, to 16,057. Meanwhile, the Nasdaq Composite began the day down 17 points, or 0.4%, at 4,574.

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