Brent oil traded near $65 a barrel as a cold blast that’s taken out almost 40% of U.S. crude production morphed into a global supply shock. Futures in London rose 0.8% after closing at the highest in almost 13 months. The global crude benchmark earlier jumped above $65, a level it hasn’t reached since Jan. 21, 2020, before Covid-19 roiled energy markets. More than 4 million barrels a day of U.S. oil output is now offline, according to traders and executives, amid an unprecedented cold snap that’s frozen well operations and led to widespread power cuts. A spate of refinery outages has curbed demand for crude in the country, however, while gasoline consumption is also down as the icy conditions […]