US stock futures faltered on Wednesday, eyeing a return to the steepest selloff in months as Wall Street waited for President Trump's speech at Davos for insight into the Greenland crisis. Contracts on the Dow Jones Industrial Average (YM=F) and the tech-heavy Nasdaq 100 (NQ=F) edged down aroung 0.2%. Meanwhile, S&P 500 futures (ES=F) hovered just below the flat line, coming off a bruising Tuesday session that saw investors rush for the exits against a backdrop of global insecurity. Markets are weighing ...