Bloomberg China’s oil refining giant said its trading unit lost almost $700 million last year after being wrong-footed by zigzagging markets, revealing one of the biggest losses by a commodity trader in the last decade. Sinopec blamed the losses at its Unipec unit in part on “inappropriate hedging techniques” and said it closed its positions after discovering the problem. Oil …

Bloomberg China’s offshore oil and gas experts are dipping their toes in wind power, bringing their experience working on the ocean floor and adding a new twist to their portfolios. Cnooc Ltd., the country’s top offshore oil explorer, said it wants to use its expertise in marine geology to replicate its success in the offshore wind sector. The company entered …

Bloomberg America’s gasoline producers can run, but they can’t hide from a plunge in refining profit margins that sanctions against Venezuelan crude would only worsen, analysts said. The biggest US refiners are expected to report strong fourth-quarter earnings thanks to profits from diesel processing in a strong US economy, as well as a drop of about 40 percent in crude …