US stock futures diverged early Friday after the major indexes slumped following a weak earnings outlook from retail giant Walmart (WMT). S&P 500 (ES=F) futures edged up 0.1%, while Nasdaq 100 futures (NQ=F) rose 0.3%. Dow Jones Industrial Average futures (YM=F) fell 0.3%, after the index led a broad Wall Street slide on Thursday. The