US stock futures sank on Friday, retreating from record highs as inflation worries preyed on markets busy gauging the success of the Trump-Xi summit in China. Contracts on the Nasdaq 100 (NQ=F) tumbled 1.3%, while those on the S&P 500 (ES=F) fell 0.9% after surging to all-time closing highs on Thursday. Dow Jones Industrial Average […]