CNBC | Oil ends higher as guesswork on OPEC freeze, US rate hike continues MarketWatch Oil futures settled higher Monday as the guesswork surrounding the likelihood of a collective agreement among crude producers to cap output and the potential for a U.S. interest-rate increase continued. A report from the Organization of the Petroleum ... OPEC: The Fed's next move will impact oil markets MarketsOpec ups forecast for non-Opec oil output Saudi, Iran hike oil production before talks on output freeze |