OPEC is heading for a tough meeting this week, delegates and officials said on Tuesday, as country members pump record volumes amid an uncertain demand outlook and as the prospects of a U.S. inter‎est rate hike could push oil prices even lower. “It will be tough,” one OPEC source said, referring to the meeting in Vienna on Friday, which is widely expected by OPEC insiders and watchers to stay the course and roll over existing output policies. Saudi Arabia’s oil minister Ali al-Naimi rebuffed questions after his arrival in Vienna on Tuesday. When asked if Saudi’s strategy of defending its market share is working, Naimi responded with questions: “Which strategy?.. Who said we are keeping market share?” Many non-Gulf OPEC delegates have complained the Saudis impose their views […]