US stock futures faltered on Wednesday, eyeing a return to the steepest selloff in months as Wall Street took in President Trump's speech at Davos for insight into the Greenland crisis. Dow Jones Industrial Average futures (YM=F) edged down around 0.3%, while those on the tech-heavy Nasdaq 100 (NQ=F) also backed off 0.3% in a reversal from earlier small gains. Meanwhile, S&P 500 futures (ES=F) slipped 0.1%, coming off a bruising Tuesday session that saw investors rush for the exits against a backdrop of g ...