U.S. crude futures rose for a second day on Tuesday, with data showing hedge funds are betting big across oil markets following OPEC production cuts agreed last year. U.S. West Texas Intermediate crude was up 27 cents, or 0.5 percent, at $53.67 a barrel at 0511 GMT, after rising about 0.5 percent in a shortened session on Monday due to a U.S. national holiday.