U.S. Stocks Open Higher Ahead Of Yellen Testimony

U.S. stocks opened higher Tuesday, building on the previous session's gains as investors awaited congressional testimony from Federal Reserve chief Janet Yellen. The S&P 500 opened 4 points, or 0.2%, higher at 2,086. The Dow Jones Industrial Average added 30 points, or 0.2%, to 17,835. Meanwhile, the Nasdaq Composite began the session up 10 points, or 0.2%, at 4,847.

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