Oil markets opened the week higher and were heading for the biggest January gain in at least 30 years as robust demand outpaced fresh supply. The global crude benchmark rose 0.8%, paring earlier gains, but remains on track for a 17% gain this month. West Texas Intermediate futures traded above $87 a barrel. Traders on Monday were greeted with a familiar set of drivers, from the weather to stockpiles. Low temperatures in the U.S. have been boosting demand for fuels, as Boston reported a daily snow record and New York’s Central Park saw more than 8 inches fall. Oil infrastructure in Ecuador was damaged by a rockslide, potentially endangering supply. Meanwhile, oil held on tankers fell by more than a fifth last week, the latest sign of […]