"Opec did not guarantee that they would automatically replace lost Iranian barrels of oil due to sanctions," said Bob Yawger, director of the futures division at Mizuho Securities USA. "Now you have the corresponding disappointment in the market, oil’s rally as a result and a four-year high in Brent."
Oil has climbed since early August as speculation swirls over whether the Organization of Petroleum Exporting Countries and its allies will boost production, with sanctions on the Middle East nation’s exports set to take effect in November. Bank of America Merrill Lynch joined JPMorgan Chase & Co. in anticipating higher prices down the line -- the former expects crude to reach $95 a barrel in the first half of next year.