Oil prices rebounded in the second quarter after a historic two-year rout, boosted by a weaker dollar and a number of supply outages from Canada to Nigeria. Now, investors face an unusual predicament: They can’t agree on whether the market is facing a supply surplus or a deficit. “We see more uncertainty than we have seen before in terms of price formation” in the oil market, said Eldar Saetre, chief executive of Norwegian oil major Statoil AS STO 2.61 % A, in an interview. U.S. oil prices rose $9.99, or 26%, in the second quarter to $48.33 a barrel on the New York Mercantile Exchange, the best quarterly performance on a percentage basis since 2009. Brent, the global benchmark, rose $10.08, or 25%, to $49.68 a barrel on ICE Futures Europe. U.S. oil prices […]