The International Energy Agency said Friday global demand for oil would slow down next year, as it warned that crude prices could resume a recent downward spiral. “The bottom of the market may still be ahead,” the agency said in its closely watched monthly oil-market report. In its first oil-consumption assessment for next year, the IEA—which advises industrialized nations on their energy policies—said global oil demand growth is forecast to slow to 1.2 million barrels a day in 2016. That compares with an average 1.4 million barrels a day this year. It said a return of Iranian oil and if Greece were to exit from the euro could put further pressure on oil prices—which have lost about 10% in the past month. Tehran this week failed to meet a deadline to clinch a nuclear deal with world powers. But if sanctions were lifted, it could raise exports immediately out […]