Oil gains most since June after nations raise efforts to support prices

Oil was jolted higher by efforts across the globe to support prices as Saudi Arabia and Russia extended their pact to manage the market and Canada’s largest producing province ordered unprecedented output curbs. Prices retreated slightly after Qatar said it was leaving OPEC.

After their worst month in a decade, futures in New York and London advanced more than 5 per cent on Monday. Although Moscow and Riyadh have yet to confirm any fresh cuts, the agreement by the Russian and Saudi leaders over the weekend opens the door for a deal at the OPEC meeting this week in Vienna. Alberta’s