Oil retreated from the highest close since July 2015 as focus shifted to expanding U.S. crude stockpiles after OPEC and other producing nations agreed to cut output to stabilize the market. Futures slid as much as 1.7 percent in New York after climbing 6.5 percent over the previous four sessions. U.S. inventories rose by 4.68 million barrels last week, the industry-funded American Petroleum Institute was said to report. Government data Wednesday is forecast to show supplies fell. Oil markets will swing into deficit in the first half of 2017 as producers curb supply, according to the International Energy Agency, earlier than its previous forecast. Oil has gained about 16 percent since the members of the Organization of Petroleum Exporting Countries agreed Nov. 30 to trim output for the first time in eight years. The deal reached over the weekend in Vienna to secure supply cuts from 11 non-OPEC producers […]