U.S. and global oil markets managed to grind out gains Tuesday, rallying in the final minutes of trading after chopping around the break-even point most of the session. The benchmark U.S. oil contract surged into the close of trading, ending the day up 0.5% at $35.89 on the New York Mercantile Exchange, after spending much of the day in negative territory. The global Brent contract rose 0.5% to $37.87 a barrel on the ICE Futures Europe exchange. Analysts and brokers were hard-pressed to explain the late-session surge, and there was little in the way of headlines that explained the jump. In the mild trading that dominated before the end of the day, the market appeared to be taking a breather on a light news day after a 50% run-up between February and March followed by a 13% selloff in the last two weeks. “It’s been a pretty strong slide,” […]