Oil held near $40 a barrel after the dollar headed for a third week of losses amid signs central banks will continue to provide stimulus, and as U.S. output dropped to the lowest since November 2014. Futures dropped as much as 0.7 percent in New York after climbing 4.5 percent Thursday. The Bloomberg Dollar Spot Index held near the lowest level since June after the Federal Reserve scaled back expectations for the pace of interest-rate gains. U.S. production slid through March 11 and stockpiles expanded by 1.32 million barrels, the smallest gain in five weeks, according to an Energy Information Administration report on Wednesday. Oil is set for the longest run of weekly gains since May amid speculation stronger demand and shrinking U.S. crude production will ease a global glut. Declines in shale output are contributing more to the rise in prices than talks between major crude-exporting nations on […]