In 2015, the fracking outfits that dot America’s oil-rich plains threw everything they had at $50-a-barrel crude. To cope with the 50 percent price plunge, they laid off thousands of roughnecks, focused their rigs on the biggest gushers only and used cutting-edge technology to squeeze all the oil they could out of every well. Those efforts, to the surprise of many observers, largely succeeded. As of this month, U.S. oil output remained within 4 percent of a 43-year high. The problem? Oil’s no longer at $50. It now trades near $35. For an industry that already was pushing its cost-cutting efforts to the limits, the ... (full story)