Crude oil prices drifted lower in early Tuesday trading amid warnings that emerging trade tensions could undermine an otherwise rosy economic outlook. Crude oil prices slipped in Monday trading as expected gains in U.S. oil production overshadowed a slight drop in North American exploration and production activity reported last week. Prices moved higher in overnight trading but moved into the red before the opening bell in New York. Economists for the Organization for Economic Co-operation and Development said the global economy is projected to grow by 3.9 percent for both this year and 2019. Inflation, meanwhile, should rise slowly. “Growth is steady or improving in most G20 countries and the expansion is continuing,” OECD Acting Chief Economist Alvaro Pereira said in a […]