Dow, S&P 500, Nasdaq futures sink as worries about frothy valuations run high
Tech led a sharp pullback in US stock futures on Tuesday as doubts about high-running valuations preyed on investors sifting through the latest flurry of quarterly earnings. S&P 500 futures (ES=F) sank 1.1%, while those on the tech-heavy Nasdaq 100 (NQ=F) tumbled 1.5%. Contracts on the Dow Jones Industrial Average (YM=F), which includes fewer tech…