The Oil Cartel Is Getting Smaller — and a War Is Setting the Oil Price

The headline that Bahrain will not take part in some meeting sounds like a niche diplomatic tiff. It is not. It is a window into what happened to the company that is supposed to set the world's oil supply, and it is worth understanding before you decide what oil is actually worth.

Here is the thing that is almost too obvious to say out loud: the cartel that investors lean on to hold a floor under crude has gotten smaller, and it is getting smaller in a hurry. OPEC+ is nominally 21 countries. But the monthly meetings that actually decide output are not all 21. Since the beginning of this year they have been a seven-country affair — Saudi Arabia, Russia, Iraq, Kuwait, Kazakhstan, Algeria and Oman. Bahrain used to be inside the broader agreement as a small producing member. It is not in the room that matters, and it is not alone.

The room got smaller, then smaller again

The first country to leave was not the one you would guess. The United Arab Emirates, an OPEC member for nearly six decades, walked out of both OPEC and OPEC+ entirely, effective May 1, 2026, after years of fighting over its production quota. Iraq floated the idea of leaving in June, unhappy with its own slice. Venezuela, a founding member, has spent late summer weighing an exit too. The oil-commentary class even has a name for the pattern: the "exit domino". Every quota dispute is now, implicitly, an argument about whether the aggrieved party is better off inside the group or out of it.

You can see why the boundary keeps getting tested. The quota system works by giving each member a number — how much it is "entitled" to pump — and that number comes out of an audited estimate of each member's production capacity. So there is a built-in incentive: the member who can convince the auditors its capacity is bigger gets a bigger future quota. That is exactly the kind of negotiated number that ended the UAE's patience. The real fight of this cycle is the 2027 quota review, built on annual capacity audits that run through September 2026, and every member is coming into it with a reason to claim more.

The decisions are on paper, the war sets the price

Here is the strangest part of the current arrangement: the seven countries in the room have spent 2026 formally raising output — rolling back a 1.65 million barrel-a-day voluntary cut from 2023 at roughly 188,000 barrels a day each month, finishing in September. Saudi Arabia's quota, for example, was raised to over 10 million barrels a day even as the kingdom's actual production sat near 7.8 million. The numbers run in opposite directions because nobody can ship the barrels out: the U.S.-Israel war on Iran has, since late February, closed the Strait of Hormuz, which is where a big share of the world's seaborne crude passes. Actual OPEC+ output collapsed from about 42.8 million barrels a day in February to about 33.2 million in April. The cartel is not tightening supply by exercising restraint; a war is doing it.

Which is why the market prices crude where it is — WTI around $95 a barrel, Brent near $99, up from roughly $72 before the war started and off a four-year high above $125. Call it what it is: a war-risk premium sitting on top of a cartel that is, at the moment, largely a spectator. Jorge Leon, a former OPEC official now at Rystad Energy, put the risk plainly: while the strait is closed, the quota hikes mean "very little," and when it reopens, the market can swing quickly from fear of shortage to fear of surplus. That is the whole fragile architecture in one sentence.

What it means for an investor

Draw the implication carefully. If you own energy stocks or an oil fund because you are betting that OPEC supply discipline keeps a floor under prices, you are betting on the one leg of the oil bull case that is visibly weakening. The cartel's decisions are mostly symbolic right now, its membership is shrinking, and a bunch of members with large idle capacity have both an incentive and — thanks to the UAE's example — a demonstrated willingness to pump once exports are actually possible. The 2027 quota review is the moment when all those competing capacity claims get settled, and it is also the moment another producer could decide, like Bahrain is effectively deciding every month, that the meeting is not where its production gets decided.

The structural question is not really whether Bahrain shows up. It is whether a group that keeps losing members and whose decisions are being made redundant by events can keep being the thing that holds the oil market together. Today it mostly can, because the war is doing the price-setting for it. The day the strait stops doing that — the day the fear flips from shortage to surplus, and seven countries with enormous spare capacity and one fewer discipline-keeper in the room face a real choice — is when "who's in the meeting" will matter.