The Squeeze Is On: How U.S. Sanctions, OPEC Politics, and a Shadow War Are Reshaping Global Oil Markets

OPEC’s crude oil production dropped sharply in May, and the reasons stretch far beyond the cartel’s usual internal negotiations over output quotas. A convergence of U.S. military strikes on Iranian infrastructure, tightening American sanctions on Tehran’s oil exports, and an aggressive push by Saudi Arabia to discipline overproducing members has created one of the most volatile supply pictures the oil market has seen in years. The result: a market caught between collapsing Iranian exports, surging Saudi output threats, and a global demand outlook clouded by trade wars and economic uncertainty.

According to The Wall Street Journal, OPEC’s total production fell by roughly 400,000 barrels a day in May compared with the prior month, landing near 26.6 million barrels a day. Iran accounted for the lion’s share of that decline. The country’s exports have cratered under the dual pressure of American airstrikes targeting its nuclear facilities and a fresh round of sanctions aimed squarely at anyone buying Iranian crude. Delegates and analysts told the Journal that Iranian output slipped to around 2.5 million barrels a day — its lowest level since the Trump administration’s “maximum pressure” campaign first choked supply lines in 2019.

That’s a staggering fall from the roughly 3.4 million barrels a day Iran was producing just months ago, before the U.S. escalated its campaign.

The military dimension of this supply disruption can’t be overstated. The United States launched strikes against Iranian nuclear sites in mid-May, an operation that sent shockwaves through energy markets and instantly raised the geopolitical risk premium embedded in oil prices. Iran’s ability to export has been further hampered by what traders describe as a near-total unwillingness among shipping companies and insurers to touch Iranian cargoes. Even China — long Iran’s most reliable customer — has pulled back purchases, according to multiple tracking services and shipping data reviewed by analysts.

And yet oil prices haven’t surged the way many expected. Brent crude has hovered in the low-to-mid $60s per barrel range, far below the $80-plus territory that prevailed earlier in the year. Why? The answer lies partly in what OPEC’s largest producer is doing — and partly in what the global economy isn’t.

Saudi Arabia has been the wild card. The kingdom announced in early June that it would accelerate its plan to unwind voluntary production cuts, adding more barrels to the market at a pace that caught many traders off guard. Riyadh has framed the move as a response to members like Iraq and Kazakhstan that have consistently produced above their agreed quotas. The message from Saudi Energy Minister Prince Abdulaziz bin Salman has been blunt: comply with your commitments, or watch the kingdom flood the market and drive prices lower.

It’s a familiar playbook. Saudi Arabia used the same strategy in 2020, launching a price war with Russia that briefly sent oil prices negative. This time, the target is different — fellow OPEC+ members rather than an external rival — but the economic logic is identical. Punish overproducers by making their excess barrels unprofitable.

The strategy carries enormous risk. According to the Journal, several OPEC delegates privately expressed concern that adding Saudi barrels while Iranian supply is already collapsing could send contradictory signals to the market. One delegate described the situation as “managed chaos.” Another said the group’s cohesion was being tested more severely than at any point since the 2020 price collapse.

The numbers tell a complicated story. OPEC+ as a whole — the broader coalition that includes Russia and other non-OPEC producers — had been restraining output by roughly 5.8 million barrels a day through a combination of mandatory and voluntary cuts. But compliance has been spotty. Iraq exceeded its quota by an estimated 200,000 barrels a day in recent months. Kazakhstan, buoyed by the expansion of its giant Tengiz oil field, has been even further out of bounds.

So Saudi Arabia decided to act.

The kingdom’s June production is expected to rise to approximately 10.2 million barrels a day, up from around 9 million barrels a day where it had been holding for much of the past year. That’s a massive swing. And Riyadh has signaled it could go higher still if compliance doesn’t improve. The implicit threat: Saudi Arabia can produce over 12 million barrels a day if it chooses to, enough to overwhelm virtually any supply shortfall elsewhere in the cartel.

For oil traders, the interplay between vanishing Iranian barrels and surging Saudi output has created a hedging nightmare. The forward curve for Brent crude has flattened dramatically, with nearby contracts trading at only a modest premium to contracts six months out — a sign that the market doesn’t see an imminent supply crunch despite the geopolitical turmoil. Options markets tell a different story, however. The cost of insuring against a spike in oil prices — so-called call options — has risen sharply, suggesting at least some participants are positioning for an upside surprise.

The demand side of the equation offers little comfort to bulls. China’s economic recovery has disappointed, with manufacturing activity contracting in May according to official purchasing managers’ index data. Europe remains mired in sluggish growth. And the U.S. economy, while more resilient, is contending with the lagging effects of tariffs that have raised input costs across industries and dampened business investment.

The International Energy Agency trimmed its 2025 global oil demand growth forecast last month to around 1.1 million barrels a day, down from 1.3 million barrels a day projected in January. OPEC’s own secretariat, historically more optimistic about demand, has also revised its numbers lower, though it still projects growth of roughly 1.4 million barrels a day — a figure many independent analysts view as aspirational.

Then there’s the Russia factor. Moscow’s production has been harder to track since Western sanctions were imposed following the invasion of Ukraine, but available data suggests Russian output has held relatively steady near 9.1 million barrels a day. Russia has been one of the more compliant members of the OPEC+ pact, partly because its aging fields and logistical constraints make rapid production increases difficult, and partly because the Kremlin needs stable oil revenue to fund its war effort.

But Russia’s compliance could fray. The country’s budget assumptions are built around oil prices in the $65-to-$70 range, and if prices fall further, Moscow may face pressure to pump more — not less — to maintain revenue. That would put Russia on a collision course with Saudi Arabia at exactly the wrong moment.

American shale producers, meanwhile, are watching from the sidelines with a mix of caution and opportunism. U.S. crude production remains near record highs of roughly 13.4 million barrels a day, but growth has slowed markedly. Rig counts have declined for several consecutive months, and public E&P companies have maintained their discipline around capital spending, prioritizing shareholder returns over volume growth. Private operators, who drove much of the shale boom’s later stages, are running low on premium drilling locations in the Permian Basin.

The net effect: the U.S. is unlikely to ride to the rescue if OPEC supply tightens further. Not quickly, anyway.

Within OPEC’s corridors, the Iranian situation has become deeply politicized. Tehran has accused Saudi Arabia of exploiting the military crisis to grab market share — a charge Riyadh denies. Iranian Oil Minister Javad Owji said in a recent statement that his country’s production losses are “temporary” and that exports would recover once shipping lanes stabilize. Few analysts believe that timeline. The sanctions regime now in place is among the most comprehensive ever applied to a major oil producer, covering not just crude exports but also petrochemicals, shipping insurance, and port services.

The human cost inside Iran is mounting too. Revenue from oil exports funds a significant share of government spending, including subsidies for food and fuel that millions of Iranians depend on. A prolonged export collapse could trigger domestic unrest — a possibility that U.S. officials have acknowledged privately but declined to discuss publicly.

For consuming nations, the picture is mixed. Lower oil prices are generally positive for importers like India, Japan, and South Korea. But the uncertainty surrounding supply — will Iran’s exports recover? will Saudi Arabia follow through on its threats? — makes long-term planning difficult for refiners and industrial buyers. Several Asian refiners have reportedly increased purchases of spot cargoes from West Africa and Latin America to replace lost Iranian supply, pushing up freight rates on key tanker routes.

There’s also the question of strategic petroleum reserves. The U.S. Strategic Petroleum Reserve, drawn down significantly during the 2022 energy crisis, has been slowly refilled but remains well below its historical capacity of 714 million barrels. Current levels sit near 400 million barrels. The Biden and now Trump administrations have both expressed a desire to replenish the reserve, but doing so at current prices would cost tens of billions of dollars — a politically sensitive expenditure.

Market structure is shifting in ways that favor traders with strong intelligence networks and tolerance for volatility. Physical oil markets — where actual barrels change hands — have become increasingly opaque as Iranian crude moves through shadowy intermediaries and ship-to-ship transfers designed to evade sanctions. Tracking firms like Kpler and Vortexa have reported growing discrepancies between official export data and satellite-observed tanker movements, suggesting that some Iranian oil is still reaching buyers through circuitous routes.

But the volumes are shrinking. And every barrel that disappears from the legitimate market tightens the supply-demand balance for everyone else.

OPEC’s next formal meeting is scheduled for later this month, and delegates say the agenda will be dominated by two questions: how to handle Iran’s involuntary production decline, and whether to continue the accelerated unwinding of Saudi Arabia’s voluntary cuts. The two issues are linked. If Iranian supply remains depressed, there’s a natural opening for other producers — especially Saudi Arabia — to fill the gap without crashing prices. But if Iran’s exports recover faster than expected, the market could quickly tip into oversupply.

The uncertainty is the point. Saudi Arabia’s strategy appears designed to keep every other producer guessing, ensuring that Riyadh retains maximum flexibility to adjust output in either direction. It’s a position of strength, but one that depends on the kingdom’s willingness to accept lower prices in the short term to enforce discipline over the longer term.

Not everyone in the cartel is on board. Nigeria and Angola, both of which have struggled to meet even their reduced quotas due to underinvestment and operational problems, have privately argued that the group should focus on supporting prices rather than punishing overproducers. Their budgets are already strained. A sustained period of $60 oil would be devastating for both countries.

The broader implications extend well beyond OPEC’s membership. Energy transition investments, which surged when oil was trading above $80, could slow if prices remain depressed. Renewable energy projects compete with fossil fuels partly on cost, and cheaper oil narrows the economic advantage of alternatives. At the same time, lower oil prices reduce the urgency that policymakers feel to accelerate the shift away from hydrocarbons — a dynamic that climate advocates have warned about for years.

For now, the market is in a holding pattern. Prices are low enough to pressure high-cost producers but not so low as to trigger a full-blown crisis. Iranian supply is falling but hasn’t disappeared entirely. Saudi Arabia is adding barrels but hasn’t opened the taps fully. And demand is growing, just not fast enough to absorb the contradictions.

Something will break. The question is what — and when. If the U.S.-Iran conflict escalates further, the loss of Iranian barrels could tighten markets sharply, especially if Saudi Arabia pauses its output increases. Conversely, if tensions de-escalate and sanctions ease, a flood of returning Iranian crude could push prices into the $50s, a level that would cause pain across the producing world.

Either scenario would reshape the global energy order in ways that are difficult to predict and impossible to reverse quickly. The only certainty is that the forces driving today’s oil market — war, sanctions, cartel politics, and weakening demand — show no signs of resolving themselves neatly. Traders, policymakers, and producers alike are operating in a fog, making consequential bets with incomplete information.

That’s not new for the oil market. But the stakes right now are unusually high.