Brent crude fell more than five percent on Sunday to below $99 a barrel — its steepest single-session drop in weeks — as U.S. officials confirmed that a framework agreement with Iran is, in their words, “95% there.” The move came after three months of brutal market turbulence triggered by the February 28 conflict between the U.S., Israel, and Iran that effectively shuttered the Strait of Hormuz, the world’s most consequential oil chokepoint. Markets are pricing in what was, until recently, unthinkable: a diplomatic endgame. Yet the final five percent may prove the hardest stretch of all.

The world’s oil supply chain has not faced a shock of this magnitude since the 1973 Arab embargo. Cumulative supply losses from Gulf producers have already exceeded one billion barrels since the conflict began, with more than 14 million barrels per day effectively shut in — an unprecedented disruption — though the supply-demand gap has remained smaller than feared because the market was already in surplus heading into the crisis, and producers including Saudi Arabia and the UAE have successfully redirected some exports to terminals loading outside the Strait. IEA

About 20% of all global oil supplies transit the Strait of Hormuz, which has remained effectively closed to normal oil flows since the war began on February 28. The diplomatic window now opening is therefore not merely a headline event. It is a structural turning point for energy markets, inflation trajectories, and the fiscal arithmetic of governments from Tokyo to Nairobi. CNN

1 — The Core Development: A Deal Takes Shape, Tentatively

Oil prices drop sharply as U.S.-Iran peace framework nears completion

The proximate cause of Sunday’s selloff was a series of disclosures by senior Trump administration officials confirming that a memorandum of understanding with Iran was within striking distance. A senior official confirmed a “No Dust, No Dollars” policy was guiding the negotiations, adding that Iran had “agreed in principle to the framework, and we are 95% there.” The same official said the U.S. had reached agreement on the nuclear stockpile and the Strait of Hormuz, but that negotiators were still haggling over specific language — a process that could take another five to seven days. Fox News

Global crude benchmark Brent fell as much as 5.2% to $98.12 a barrel, while West Texas Intermediate was near $92. Trump said in social-media posts he wouldn’t “rush” into a deal, which “isn’t even fully negotiated yet,” and that any final approval may take several days according to senior U.S. officials. Fortune

The figure that should stop energy traders cold is this: North Sea Dated has swung from a high of $144 per barrel to below $100 before rebounding, with prices around $110 at the time of the IEA’s May report — a range of volatility that has no modern peacetime precedent. Sunday’s move pushed Brent back toward the lower end of that corridor. IEA

Iran’s posture has been characteristically contradictory. Iranian President Masoud Pezeshkian insisted publicly that Tehran is “not seeking nuclear weapons,” while Secretary of State Marco Rubio reiterated that preventing Tehran from ever obtaining a nuclear weapon remains Washington’s primary objective. Meanwhile, Iran’s Tasnim news agency said the draft agreement could still collapse because the U.S. was obstructing key clauses — including a demand that Tehran’s frozen assets be unfrozen. Fox NewsFortune

The market, it seems, is choosing to hear the hopeful signal and discount the noise. That is a bet.

2 — Analytical Layer: Why the “5%” Gap Is the Whole Story

What happens to crude oil if the Strait of Hormuz reopens?

Diplomatic frameworks are not oil supply. The distinction matters enormously. Even assuming a ceasefire is signed this week, the physical reopening of the Strait — the de-mining, the insurance re-underwriting, the resumption of tanker scheduling — will take weeks, not days. Yet energy markets trade on expectation, and Sunday’s move reflects a forward-pricing of relief that may arrive unevenly and incompletely.

What would a U.S.-Iran deal mean for global oil prices?

A full reopening of the Strait of Hormuz would likely push Brent below $90 a barrel within weeks, given the surplus conditions that preceded the conflict. The IEA noted that the current supply-demand gap is significantly smaller than the raw disruption numbers suggest, because producers and consumers have adapted — but the war-risk premium embedded in prices remains substantial, and it would deflate rapidly once tanker traffic normalizes.

The five percent of the deal still unresolved is not bureaucratic fine print. It covers two of the most loaded issues in modern geopolitics: Iran’s enriched uranium stockpile, and who controls transit through Hormuz. The U.S. side said it may be willing to make “significant accommodations” on sanctions relief if Iran makes equivalent concessions on enriched uranium, but also confirmed that Tehran’s system “does not move fast enough” to finalise anything within 24 hours. Fox News

Trump’s public messaging has been characteristically bifurcated. He has signalled openness while simultaneously leaving military options visible on the table — a pressure tactic that has compressed the negotiating timeline but also injected the kind of uncertainty that keeps traders nervous. Prices tumbled earlier this week after Trump called off imminent strikes on Iran to allow more negotiations, with Brent losing more than 5% on the week and WTI shedding more than 8%. CNBC

Still, the direction of travel is unmistakable. What remains unclear is the speed.

3 — Implications & Second-Order Effects

Energy markets, inflation, and the downstream consequences of a Hormuz reopening

The most immediate beneficiaries of lower crude would be consumers in oil-importing economies who have spent three months absorbing a supply shock transmitted through petrol prices, airline tickets, freight costs, and heating bills. Since the war started, wholesale gas prices have surged more than 50% for consumers, with the nationwide U.S. average approaching $4.54 per gallon — within 50 cents of its all-time high. A deal that restores Hormuz flows would not reverse those increases overnight, but it would halt the upward spiral and give central banks room to reassess. NBC News

For OPEC+ members, the calculus is more complex. Saudi Arabia and the UAE have both lost revenue from Hormuz restrictions and gained it from higher prices. A return to $80-per-barrel oil would benefit consumers globally but squeeze the fiscal arithmetic of Gulf states that built their 2026 budgets around triple-digit crude. Riyadh’s break-even price — the oil level required to balance its national budget — sits above $80 per barrel by most estimates, meaning any sharp reversion in prices would force difficult spending choices.

The second-order effects extend well beyond energy. Myanmar, for example, imports 90% of its fuel and fertilizer through Hormuz-dependent supply chains, and the disruption has sent input costs for farmers soaring. In sub-Saharan Africa, nations that were already running primary deficits before the conflict have seen their import bills balloon. If the deal holds, the relief for frontier-market economies could be disproportionately large relative to the price move itself. CNN

Bond markets have also responded. Government bond yields dropped toward their lowest levels of recent weeks as the ceasefire signals intensified — a signal that investors are betting that lower energy costs will ease inflation expectations and, in turn, reduce pressure on central banks to maintain restrictive monetary policy.

4 — Competing Perspectives: Why Sceptics Aren’t Convinced

The market’s relief trade is understandable. It may also be premature.

Iran’s state media has repeatedly signalled that the gap between a framework and a finalised agreement is wider than U.S. officials acknowledge. Iran’s Tasnim news agency specifically warned that the draft agreement could collapse because the U.S. was obstructing key clauses, including demands around unfreezing Iranian assets. This is not merely negotiating bluster. Tehran’s internal politics are fractured: hardliners who view nuclear enrichment as a sovereignty issue are not simply going to defer to a president who says the country isn’t seeking a bomb. Fortune

The precedent from the 2015 Joint Comprehensive Plan of Action (JCPOA) is instructive and sobering. That agreement took years to negotiate and was unilaterally abandoned by the Trump administration in 2018 — a historical fact that Iranian negotiators have not forgotten and are almost certainly factoring into their demands for more durable legal guarantees. The administration’s “No Dust, No Dollars” framing gives Washington rhetorical clarity but leaves little room for the face-saving ambiguity that successful diplomatic settlements typically require.

There is also a military dimension that markets are currently discounting. Iran’s Al-Fiqar military group threatened that if the enemy attacks the Strait of Hormuz, Tehran would “break the naval blockade and may withdraw from the Non-Proliferation of Nuclear Weapons treaty” — a threat that, if executed, would represent a categorical escalation with no obvious off-ramp. Fox News

John Evans, analyst at PVM Oil, captured the fragility of the current price move when he observed earlier this month that “the crude build in the EIA Inventory Report has chased down the prices, and the move is accelerated by what appears to be a cooling of animosity in the US/Iran nuclear negotiations.” Cooling, not resolution. The markets are trading the cooling. The resolution is still being written.

CLOSING

Three months of war, a billion barrels of lost supply, and an oil price that at one point touched $144 a barrel — the scale of the disruption the Hormuz closure has inflicted on the global economy is only now being tallied. A diplomatic framework that is “95% complete” is not a ceasefire. It is an aspiration with a deadline and a hundred unresolved clauses. The remaining five percent contains all the intractable questions: how much enriched uranium Iran gets to keep, who governs the Strait it spent three months closing, and whether any agreement reached under duress can survive the political pressures on both sides.

Energy markets will continue to front-run each diplomatic signal — that is their nature. But investors, policymakers, and the consumers quietly paying $4.50 for a gallon of petrol deserve a reminder that in Middle East diplomacy, the hardest percentage is always the last.