Money manager David Einhorn’s doomsday outlook for shale oil drillers so far is failing to resonate with investors. A pessimistic assessment of the industry by the president of Greenlight Capital Inc. on Monday briefly shook the stock of the companies Einhorn targeted, dropping EOG Resources Inc. by as much as 2.8 percent after he spoke out and Concho Resources Inc. by as much as 3.5 percent. By the end of the day, though, both companies recorded gains, probably reflecting continued investor confidence that oil’s price plunge from more than $100 a barrel in 2014 is spurring cost cuts and new drilling strategies in an industry long known for its profligate spending. Crude prices have risen by 36 percent since March 17, eliminating much of the decline of the preceding nine-month oil-market rout. The oil price drop “sped up the ‘reset’ process,” said Andrew Cosgrove, an energy analyst for Bloomberg […]