S&P, Dow futures flat; Facebook weighs on Nasdaq

Facebook fell 6 percent to $119.50 in premarket trading, a day after the social media giant warned that revenue growth would slow this quarter. The S&P 500 ended lower on Wednesday for a seventh straight session, its longest such streak in five years, as the Federal Reserve signaled it could hike interest rates in December and the uncertain U.S. election continued to cloud the market's outlook. The U.S. central bank held interest rates steady, but said the economy had gained steam and job ga