U.S. energy firms this week increased the number of oil rigs operating for a second week in a row amid concerns that crude supplies will swamp global demand as U.S. output keeps growing from record levels. Companies added three oil rigs in the week to Feb. 15, bringing the total count to 857, General Electric Co’s Baker Hughes energy services firm said in its closely followed report on Friday. The U.S. rig count, an early indicator of future output, is still higher than a year ago when 798 rigs were active after energy companies boosted spending in 2018 to capture higher prices that year. Thanks to a shale boom, the United States became the world’s top […]