U.S. crude futures fell 39 cents, or 0.68%, to $56.81 a barrel on the New York Mercantile Exchange. Brent, the global benchmark, fell 20 cents, or 0.31%, to $63.49 a barrel on ICE Futures Europe. Oil prices have been on the rise in recent weeks, trading at two-year highs on the back of strong demand, escalating tensions in the Middle East, and indications that supplies are becoming tighter following more than 10 months of production cuts by some of the world’s largest producers and exporters. But Wednesday’s U.S. data included some worrying signs for oil bulls. Exports of U.S. crude dropped sharply, from a record of 2.1 million barrels a day to just 869,000 barrels a day. U.S. crude has been trading at a steep discount to the global benchmark, which has fueled a surge of shipments. If exports continue to slow, it could lead oil to start backing […]