FILE PHOTO: The OPEC logo pictured ahead of an informal meeting between members of the Organization of the Petroleum Exporting Countries (OPEC) in Algiers, Algeria, September 28, 2016. REUTERS/Ramzi Boudina
FILE PHOTO: The OPEC logo pictured ahead of an informal meeting between members of the Organization of the Petroleum Exporting Countries (OPEC) in Algiers, Algeria, September 28, 2016. REUTERS/Ramzi Boudina