US STOCKS-Dow futures up on UnitedHealth boost; bond yields, Mideast tensions weigh
(For a Reuters live blog on U.S., UK and European stock markets, click or type LIVE/ in a news window.) * UnitedHealth gains on Q1 profit beat * Fed Chair Jerome Powell to speak at 1:15 pm ET * Futures: Dow up 0.48%, S&P up 0.08%, Nasdaq down 0.02% …