Wall Street JournalOil Price Upheaval Finally Hits RefinersWall Street JournalU.S. refiners, which posted robust profits the last 18 months even as other parts of the oil business were racked by low crude prices, finally saw their roll come to a halt in th …

Wall Street JournalOil Prices Near Six-Year Lows on Oversupply FearsWall Street JournalNEW YORK—Oil prices dropped toward six-year lows Thursday on concerns that the global crude glut will worsen when the U.S.'s busy summer-driving season comes to a cl …