U.S. stocks: Futures gain; jobless claims drop By: MarketWatch September 18, 2014 at 09:44 AM EDT U.S. stocks opened higher on Thursday, sending the S&P 500 and Dow Jones Industrial Average above their previous closing highs Read More >> Related Stocks: Alibaba Group Holding Ltd Pier 1 Imports Rite Aid Corp Standard & Poors 500 Yahoo