OPEC and its allies agreed on Sunday to keep oil output levels unchanged through the end of 2026, reaffirming their production control framework amid mounting concerns over a looming supply glut and weakening prices. The decision came at the 40th OPEC and non-OPEC Ministerial Meeting, where members endorsed a new mechanism to assess national production capacities that will set the stage for fresh quotas in 2027. The group — which collectively pumps about half the world’s oil — said it would reaffirm the Declaration of Cooperation…