On May 1, the United Arab Emirates formally exited OPEC and the broader OPEC+ grouping. The move was not without precedent — Indonesia suspended membership in 2015, Qatar departed in 2019 — but neither of those exits carried the same market weight. The UAE is different. It holds excess production capacity representing roughly 25% of the cartel's total output. Its departure is not a procedural footnote. It is a structural rupture.
Bill O'Grady frames the significance1 through the lens of cartel theory and oil market history. The core problem oil markets have always faced, he explains, is supply lumpiness: large fields get discovered, output surges, and because oil demand is price inelastic in the short run, the result is a glut and price collapse. Worse, once a well is operational, producers have every incentive to keep pumping — if they don't, neighboring drillers will drain the same reservoir. This is the "milkshake" problem, a dynamic that has defined oil economics for over a century.
The first institution to manage it wasn't OPEC — it was the Texas Railroad Commission. When the East Texas Oil Field flooded the Depression-era market, prices cratered from $1.10 per barrel to $0.15. The Commission mobilized the state militia to enforce production quotas, acting as a de facto global cartel manager until 1972, when US consumption finally exhausted the state's spare capacity. OPEC stepped into that vacuum.
O'Grady's inflation-adjusted WTI price data quantifies how each regime performed. The Texas Railroad Commission era produced a price standard deviation of 5.2%. The successor Standard Oil companies, during 1915–1930, registered 6.9%. OPEC's overall record: a standard deviation of 35.4% — by far the most volatile of the three. The cartel has had moments of relative discipline, notably 1986–1999, when the standard deviation held at 10.0% even through the Gulf War. But this century has been another story entirely. Since 2001, OPEC's standard deviation has reached 24.2%, battered first by China's demand surge following WTO accession, then by the disruptive arrival of US shale.
The UAE's exit compounds what was already a weakening institutional framework. Saudi Arabia and the UAE have been at diplomatic odds — supporting opposing factions in Yemen being one visible fault line — and the history of cartel defection, O'Grady notes, is instructive. Saudi Arabia has twice responded to free-rider overproduction by flooding the market: in 1985 and again in 1999. He is direct about the likely trajectory: "we would anticipate a similar outcome here."
The near-term picture is temporarily insulated from this dynamic. The Strait of Hormuz remains mostly closed following the US-Israeli conflict with Iran, and the UAE's existing bypass pipeline to the Gulf of Oman is already running at full capacity. The UAE cannot increase exports until some form of resolution emerges. O'Grady is explicit: "the UAE's decision won't affect the oil markets significantly" in the immediate term. But the structural shift is already in motion, and markets will need to price the optionality of the UAE's unconstrained production the moment the strait reopens.
There is a second-order demand effect layered on top of the supply story. The closure of the Strait of Hormuz has already signaled to global energy consumers that the Persian Gulf is an unreliable source. O'Grady observes that "oil consumers now know that this region of the world is an unreliable supplier and will undoubtedly take steps to diversify energy sources moving forward." China's response is particularly telling — its "all of the above" energy strategy, encompassing coal, wind, solar, and nuclear, will likely accelerate the long-term structural shift away from oil dependence. Supply uncertainty, over time, suppresses demand. That demand destruction, O'Grady argues, was already a headwind for oil prices before the UAE's exit added a new layer of bearish pressure.
The conclusion is measured but unambiguous. "A smaller OPEC cartel will increase the likelihood of lower prices…eventually." The qualifier matters. Timing is unknown. Saudi Arabia will likely attempt to preserve price stability initially, consistent with its historical role. But its patience with free riders has limits, as history has twice demonstrated.
Key Takeaways for Advisors and Investors
The operative word in O'Grady's analysis is eventually. The UAE's exit does not move oil markets today — the Hormuz blockage is an effective near-term ceiling on any incremental UAE supply. But the geopolitical clock is running. Advisors managing energy exposure should treat the current supply disruption as a temporary buffer, not a structural support for prices. Once the strait reopens, the UAE's unconstrained capacity becomes a genuine bearish wildcard, particularly if Saudi Arabia repeats its historical pattern of punishing overproducers. Longer-term, the accelerating diversification of global energy supply — driven by reliability concerns, not just climate policy — reinforces a structurally softer demand backdrop for crude. For portfolios with commodity or energy sector exposure, O'Grady's framework suggests the risk is asymmetrically to the downside over a medium-to-long horizon. The cartel that once anchored oil price floors is measurably smaller, more fractured, and less credible than it was a year ago.
Source:
1 Bill O'Grady, "The UAE's Exit From OPEC," Confluence Investment Management, June 1, 2026.
