The global oil surplus will persist at least until late 2016 as demand growth slows and OPEC shows “renewed determination” to maximize output, according to the International Energy Agency. The Organization of Petroleum Exporting Countries, by effectively dropping production limits at its Dec. 4 meeting, is displaying hardened resolve to maintain sales volumes even as prices fall in an oversupplied market, the agency said Friday in its monthly report. While its policy is hitting rivals, triggering the steepest drop in non-OPEC supply since 1992, world oil inventories will likely swell further once Iran restores exports on the completion of a deal to lift sanctions, it said. Oil slumped to a six-year low below $40 a barrel in London after OPEC, which controls about 40 percent of world supply, said it would keep pumping in excess of its old production limit. Saudi Arabia, the group’s most powerful member, has steered […]