Oil prices crept back towards four-year highs on Friday as traders anticipated a tighter market due to U.S. sanctions on Iran’s crude exports. Benchmark Brent crude oil was up 10 cents a barrel at $84.68 by 0820 GMT. On Thursday, Brent fell by $1.34 a barrel or 1.6 percent. The contract is on course for a gain of around 2.5 percent for the week. U.S. light crude was up 30 cents at $74.63, a gain of more than 2 percent since last Friday. “The market mood is exceptionally bullish, with fears growing that the U.S. demands for an Iran oil embargo could cause a significant supply shortfall,” said Norbert Rucker, head of macro and commodity research at Julius Baer. Both benchmarks retreated on Thursday following a rise in U.S. oil inventories […]