Oil Plunges Past the $100 Floor: Inside the U.S.-Iran Deal That Could Reopen the Strait of Hormuz

Global oil markets experienced a seismic jolt on Monday, May 25, 2026, as the price of Brent crude collapsed back below the symbolic $100-per-barrel mark for the first time in two weeks. The catalyst for the more than 5% single-day decline wasn't a shift in physical supply or demand, but rather a surge of optimism that a geopolitical nightmare—the closure of the Strait of Hormuz—might finally be drawing to a close . The sell-off was a direct reaction to U.S. President Donald Trump’s weekend declaration that a peace deal with Iran, aimed at restoring the flow of nearly one-fifth of the world’s oil shipments, had been “largely negotiated” .

Here is the state of play on the deal, the specific bottlenecks preventing a final signature, and the practical challenges that will persist long after any ink dries.

The Market Panic Eases: Why Oil Crashed Through the Floor

The financial logic behind the drop was straightforward: the war risk premium, baked into crude prices for months, began to evaporate. Brent crude futures tumbled $5.82 to settle near $94.42, while West Texas Intermediate (WTI) slid to roughly $90.83 per barrel . Analysts described it as a direct repricing of supply disruption risk. “On late Saturday, there seemed to have been a breakthrough in the U.S.-Iran war,” noted Gaik June Goh, a senior oil market analyst at Sparta Commodities. “Markets immediately began pricing in the potential return of Iranian barrels” .

When the Strait of Hormuz—a narrow 21-mile-wide chokepoint—was effectively sealed by the conflict, it strangled not only Iranian exports but also threatened the broader Middle Eastern crude supply. By signaling that oil tankers might soon navigate those waters without threat, President Trump triggered a cascade of long-position liquidations, dragging prices to a two-week nadir .

Inside the Framework: The 60-Day Memorandum of Understanding

The emerging deal, as reported by Axios citing U.S. officials, is structured as a 60-day memorandum of understanding (MoU) that buys time to negotiate a permanent nuclear agreement . It is not yet a final peace treaty but a highly specific confidence-building mechanism. Key operational parameters include:

• Maritime Reopening: The Strait of Hormuz would be reopened without tolls during the ceasefire extension. Iran, crucially, has agreed to clear the naval mines it deployed in the waterway to allow safe passage, with the goal of restoring pre-war traffic levels within 30 days .
• Economic Relief for Performance: The U.S. would lift its blockade on Iranian ports and issue limited sanctions waivers, allowing Tehran to freely sell its oil again. This “relief for performance” mechanism ties each step of sanctions lifting to a verifiable Iranian action .
• Frozen Assets: Some Iranian assets held in foreign banks are slated to be unfrozen as part of the interim arrangement .

Secretary of State Marco Rubio, speaking from India, confirmed “significant progress, although not final progress,” and hinted that the ultimate goal was a world that would “no longer need to fear Iran getting a nuclear weapon” .

The Elephant in the Room: Nuclear Sticking Points

Despite the market’s euphoria, the political and technical obstacles are far from resolved. The MoU effectively defers the hardest problems to a separate track of nuclear talks, but those issues are so profound they can still scuttle the entire process. Officials claim the nuclear framework is “95% there,” but the final 5% represents a chasm .

The Uranium Stockpile: The single largest dispute is what to do with Iran's existing enriched uranium. Prior to the outbreak of hostilities, the International Atomic Energy Agency (IAEA) had verified a stockpile of roughly 441 kilograms of highly enriched material . The U.S. position, consistently, is that this material must be physically shipped out of the country or permanently disposed of . Iran has countered by suggesting it could simply “down-blend” the stocks or limit future production, but has resisted outright removal. The U.S. has also pushed for a fixed-term, 20-year moratorium on enrichment, a timeline Iran has rejected in favor of a much shorter 3-to-5-year pause .

Sanctions Magnitude and Sequencing: The question of sanctions relief is a classic sequencing trap. Washington has proposed offering “minimal sanctions relief” up front, a figure that contradicts Iran’s demand for a sweeping, verifiable dismantling of all sanctions. Tehran wants full access to global banking and oil markets and, critically, guarantees that no future U.S. administration can unilaterally withdraw as the Trump administration did with the JCPOA in 2018 .

The Bushehr Exception: A further flashpoint is the destiny of Iran’s nuclear infrastructure. The maximalist U.S. goal has been to dismantle all of Iran’s nuclear capabilities except for the civilian Bushehr power plant—effectively a nuclear castration that Iran’s leadership considers political suicide and has flatly rejected .

What Both Sides Are Saying (and Not Saying)

Public signaling reveals a carefully choreographed dance of optimism and threat.

From the U.S. , President Trump has taken an ambiguously bullish tone. Truth Social posts declared the deal “largely negotiated, subject to finalization,” but he also cautioned that there is “no rush” . Behind the scenes, the administration has shown flexibility, signaling that it might be willing to accept limited peaceful enrichment under IAEA monitoring, a softening of the prior “zero enrichment” posture .

From Tehran, the messaging is deliberately cautious. The semi-official Tasnim news agency confirmed the broad details of the deal but went out of its way to emphasize that Iran “would exercise its sovereignty over the Strait of Hormuz,” pushing back against the narrative of capitulation. While acknowledging that gaps are narrowing, Iranian officials have insisted publicly that “there is no deal yet” .

Beyond the Signing Ceremony: The Ghosts in the Machine

Even if the memorandum is signed tomorrow, the execution phase is a minefield of its own:

Nuclear Collapse Risk: The 60-day clock is incredibly tight. If the permanent nuclear negotiations within that window fail, the ceasefire is structured to dissolve, potentially snapping the Strait of Hormuz shut again and plunging the region back into crisis.

The Trust Deficit: The 2018 U.S. withdrawal from the JCPOA has poisoned the well for verification. Iran wants cast-iron guarantees against future sanctions, while Washington insists on robust, short-notice IAEA inspections. In this atmosphere, any misinterpretation of a ship’s course or a centrifuges' activity could trigger a catastrophic breakdown in compliance .

Logistics of Demining: Getting the shipping insurance market to trust the Strait again is as hard as physically clearing the mines. While the deal calls for pre-war traffic levels in 30 days, the process of surveying and clearing an active sea lane is a delicate military operation that doesn’t always adhere to political deadlines .

Domestic and Regional Spoilers: In Washington, hardliners in Congress may balk at sanctions relief without ironclad, permanent verification. In Tehran, parliamentary hardliners and elements of the Revolutionary Guard view any concession on the enrichment cycle as a betrayal. Simultaneously, Israel and some Gulf Arab states view a deal that legitimizes Iran’s enrichment capabilities as an existential threat, giving them a strong incentive to torpedo or undermine the agreement .

For oil markets, the Monday crash is a bet on a diplomatic miracle. But the actual return of Iranian barrels, the stability of the ceasefire, and the health of the global economy remain hanging in the balance, governed by a fragile 60-day clock and a long history of failure.