U.S. stocks opened slightly lower on Tuesday as investors digested a slew of earnings reports and better-than-expected housing data. The S&P 500 opened 3 points, or 0.1%, lower at 2,030. The Dow Jones Industrial Average fell 40 points, or 0.2%, to 17,190. The Nasdaq Composite began the day down 6 points, or 0.1%, at 4,898.
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