U.S. stock futures were down Friday amid mixed corporate earnings results, with a disappointing report from mega-cap Amazon (AMZN) creating an overhang. Here were the main moves in the pre-market session, as of 8:01 a.m. CT: S&P 500 futures (ES=F): – 3.5 points.. SPY – 0.63. What we look is the same move like yesterday. ...