Oil jumped as the International Energy Agency said OPEC had achieved record initial compliance of 90 percent with their cuts agreement, while demand grew faster than expected. Futures gained as much as 1.1 percent in New York. In the first month of the Organization of Petroleum Exporting Countries’ agreement, key member Saudi Arabia reduced production by even more than it had committed , while higher demand is aiding the group’s bid to re-balance world markets, the IEA said. Oil has fluctuated above $50 a barrel since a deal to trim output between OPEC and 11 other nations took effect on Jan. 1. U.S. producers are taking advantage of higher prices by increasing drilling activity and boosting daily output to the highest level since April, a dynamic the IEA said is capping prices in the mid-$50s. “The key question for the oil market is how long OPEC can sustain this […]