Yahoo Finance | Oil prices edge up on Iran tensions, but rising shale output caps gains Yahoo Finance SINGAPORE (Reuters) - Oil prices edged up on Monday on fears that new U.S. sanctions against Iran could be extended to start affecting crude supplies, but markets were capped by further signs of growing U.S. production. Tensions between Tehran and ... Oil's Promised Land Slips Away on OPEC Leaks Oil Price Tug Of War US May Export More Oil Than 4 OPEC Producers |