The EIA explains that OPEC+ grew from OPEC after a 2016 agreement with 10 other producers, including Russia. OPEC produced about 28.7 million b/d of crude in 2022, roughly 38% of world output.
Understanding OPEC+ membership and its share of supply helps buyers judge how coordinated cuts can move crude prices.
After 844 past policy events, Crude Oil (WTI) moved a median +0.6% over 5 sessions (56% higher; middle half -3.0% to +4.1%), and +1.4% over 20.
After 833 past policy events, Crude Oil (Brent) moved a median +0.6% over 5 sessions (54% higher; middle half -3.3% to +3.7%), and +1.3% over 20.
After 157 past policy events, ULSD / Diesel moved a median +0.4% over 5 sessions (53% higher; middle half -4.4% to +3.3%), and -0.7% over 20.
Moves of each commodity's benchmark from the last close before the event. Historical reads pool past events of the same kind; they describe what happened, not what will. Not investment advice.