Stock market today: S&P 500, Nasdaq futures rise as UnitedHealth drags on Dow, GM leads out earnings rush

US stock futures mostly moved higher on Tuesday as tech hopes offset Trump worries, with a slide in UnitedHealth (UNH) dragging on the Dow and Wall Street weighing a long-awaited India-EU trade deal. S&P 500 futures (ES=F) rose 0.3%, while those on the tech-heavy Nasdaq 100 (NQ=F) climbed 0.7%. But Dow Jones Industrial Average futures (YM=F) dropped roughly 0.3% on the heels of gains for Wall Street indexes. Trade drama gripped markets, schooled by the Greenland crisis to stay alert even with a packed e ...