No. 2 U.S. crude explorer posts first quarterly loss since ’02 OPEC’s market-share war is inflicting more pain than the world’s top tier of oil producers have felt in at least 13 years. Chevron Corp., the first super-major oil producer to report fourth-quarter results, posted its first loss since 2002 on Friday and said it’s bracing for a review of its credit rating. A glut of crude from the Persian Gulf and North American shale fields has collapsed prices, forcing the company to write down the value of its fields. Chevron’s results may presage a wave of writedowns next week as […]