U.S. Stocks Open Lower As Oil Weakness Persists

U.S. stocks opened lower Friday, as weakness in the oil market, that sent the prices of crude-oil futures to seven-year lows, continued to dent sentiment. The main indexes were still set to book modest weekly gains. Disappointing quarterly results from CarMax sent its shares tumbling. The S&P 500 fell 10 points or 0.5% lower at 2,031. The Dow Jones Industrial Average dropped 112 points or 0.6% to 17,384. The Nasdaq Composite began the day down 21 points or 0.5%, at 4,980.