First, they ignored each other. Then, they went into a bruising fight. Finally, they are talking, albeit with opposing agendas. 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 this week and OPEC is readying a trip for its top officials to Texas in a bid to understand whether the two industries can co-exist or are poised to embark on another major fight in the near future. REUTERS RECOMMENDS: “We have to coexist,” said Khalid al-Falih, Saudi Arabia’s energy minister, who pushed through OPEC production cuts in December, reversing Riyadh’s previous strategy to […]