Reuters | Oil rises, heads for weekly gain as Iran tensions support Reuters "The latest agreement with Iran does not open the floodgates for a significant return of Iranian oil on the market as many had feared," said Harry Tchilinguirian, head of commodity markets strategy and oil strategy at BNP Paribas. World powers and Iran ... Ewart: Unstable oil prices get more unpredictable daily Oil prices lift amid Iran uncertainty Oil plunges as supply glut grows |