U.S. stocks opened lower on Tuesday, as a slump in oil prices hit energy and materials companies. A better-than-expected reading on U.S. home prices lifted home builders, such as Lennar Corp. . The S&P 500 opened 5 points, or 0.2%, lower at 2,031. The Dow Jones Industrial Average fell 58 points, or 031%, to 17,477. Meanwhile, the Nasdaq Composite began the day down 12 points, or 0.2%, at 4,754.
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