Reuters | OPEC ponders how to co-exist with US shale oil Reuters The history of the relationship between OPEC and the U.S. shale oil industry has evolved a great deal since the cartel discovered it had a surprise rival emerging in a core market for its oil around five years ago. U.S. shale bankers came to Vienna ... Oil Tanked For No Reason OPEC decision stabilizes oil prices, but for how long? Oil volatile, sterling falls to two-week low on election poll |