US stocks open higher after four-session surge By: CNBC.com News February 12, 2014 at 09:30 AM EST Stocks gained Wednesday, as the S&P 500 extended its largest four-day rise in more than a year, after Chinese exports increased more than expected. Read More >> Related Stocks: Amazon.com Campbell Soup Deere & Co Discovery Communications Fireeye Inc Generac Holdings Inc Molson Coors Brewing Red Robin Gourmet Burgers Inc Sentinelone Inc Cl A Sonoco Products Company VF Corp