Tech drives indexes higher on Wall Street after choppy start

Big technology companies are powering stocks higher on Wall Street Monday, placing the market on track to extend its gains after a three-week winning streak. The S&P 500 is up 0.9% after being down 0.3% in the early going. Gains by technology and communication stocks and companies that rely on consumer spending outweighed losses elsewhere in the market. Noble Energy climbed after the company agreed to be acquired by Chevron for $5 billion. Investors are looking ahead to a busy week of earnin