Iran claims permanent control of the Strait of Hormuz: the Iran-Oman transit protocol is the war’s most consequential geopolitical development — and oil markets haven’t priced it yet

NEW YORK, April 3, 2026 — Good Friday. While U.S. equity markets are closed and the March Non-Farm Payrolls report lands into an empty room, the Iran war’s most strategically significant development since the conflict began on February 28 arrived quietly on Thursday afternoon: Iran announced it is drafting a bilateral protocol with Oman to “monitor transit” through the Strait of Hormuz — establishing a joint governance mechanism over the waterway through which 20% of the world’s oil supply normally passes. Iranian Deputy Foreign Minister Kazem Gharibabadi described the arrangement as designed to “facilitate and ensure safe passage,” but the Eurasia Group’s senior Iran analyst Gregory Brew offered a starker assessment to MS NOW: if Iran manages to take control of the Strait of Hormuz permanently, it would be a “colossal win” for the country — more powerful than before the war, and worth up to $100 billion in annual toll revenue. Oil prices should be significantly higher than they are. The Easter weekend gap into Monday April 6 is where that repricing begins.

What the Iran-Oman protocol actually says — and what it actually means

The protocol, confirmed by Gharibabadi via Iran’s state news agency IRNA, establishes that tanker traffic through the Strait of Hormuz “should be supervised and coordinated” between Iran and Oman — the two countries whose territorial waters the strait passes through. The framing is civilian: the deputy foreign minister described it as a peacetime arrangement designed to “facilitate traffic and ensure safe passage” rather than a wartime measure. He explicitly stated it would “not mean restrictions.” Iran’s parliament has separately passed legislation to charge tolls of up to $2 million per ship transiting the strait — which, at pre-war throughput of approximately 138 vessels per day, would amount to approximately $100 billion in annual revenue for Tehran. For context, that figure approximately matches Iran’s total pre-war annual oil export earnings.

The strategic architecture of the protocol is not difficult to read. Iran’s five-point peace proposal, rejected by the United States in late March, explicitly included “international recognition of Iranian sovereignty over the Strait of Hormuz” as a ceasefire condition. The bilateral protocol is the practical implementation of that condition — not through international recognition, which the U.S. would never grant, but through a signed agreement between the two sovereign states whose territorial waters the strait physically passes through. Where the peace proposal asked the world to recognise Iranian sovereignty in principle, the protocol creates it in practice. If the protocol is signed and remains in place through any ceasefire negotiation, Iran enters post-war diplomacy not as a country claiming sovereignty over Hormuz, but as a country already exercising governance through an implemented bilateral agreement. The burden shifts to everyone else to explain why a signed arrangement between two neighbouring states should be dissolved — a dramatically harder diplomatic argument to win.

Why Oman — and what it gets from the arrangement

Oman’s role in the protocol is not incidental — it is essential to Iran’s strategy. The strait’s internationally recognised shipping lanes pass through Omani territorial waters, meaning that any vessel seeking to transit without Iranian permission would theoretically be able to use the Omani corridor. An Iran-Oman bilateral governance agreement neutralises that workaround: if Oman is a signatory to a joint monitoring protocol, tankers cannot simply argue that they are transiting Omani waters to avoid Iranian oversight. The framework closes the legal loophole that is the strait’s most obvious circumvention route. Oman, which has historically maintained a neutral diplomatic position in Gulf affairs — serving as an intermediary in U.S.-Iran back-channel communications going back decades — has significant incentive to participate. As Brew noted, Oman “loses relatively little by cooperating with Iran right now to ease pressure on the strait,” while gaining a seat at the table in any post-war governance arrangement of the world’s most strategically valuable waterway. The longer-term question is whether Oman continues cooperating after the war — when the leverage Iran currently exercises through the blockade dissolves and the protocol’s terms become purely legal rather than militarily enforced.

Former senior CIA official Ted Singer described the dynamic precisely: “Try to create division between Oman and the rest of the Gulf countries. Why not fiddle around with this and see if something sticks?” That framing captures the protocol’s immediate strategic purpose — it is a test of what Iran can institutionally embed during the window when it holds maximum leverage. Saudi Arabia, the UAE, Qatar, and Kuwait — all of whom export oil through Hormuz — have not commented publicly on the Oman agreement. Their silence is meaningful: any public objection to a bilateral arrangement between two sovereign neighbours would require them to explain why third parties should have veto rights over an agreement between the strait’s actual coastal states. It is a diplomatically awkward position that Iran has deliberately engineered.

The oil market implication — why Brent should be materially higher

The Iran-Oman protocol is the oil market development that changes the post-war pricing framework most fundamentally. Prior to Thursday’s announcement, the oil market’s base case had been that Hormuz would reopen “naturally” once the war ended — a framing Trump himself used in his Wednesday night address. That base case assumed a return to pre-war free transit conditions within weeks or months of a ceasefire. The protocol invalidates that assumption: even under the most optimistic post-war scenario, the strait’s future governance structure will be subject to negotiation, and Iran has now established a bilateral institutional mechanism that gives it a legal framework for asserting ongoing control regardless of whether any ceasefire terms explicitly address Hormuz sovereignty.

The physical market is already pricing this more accurately than the paper futures market. As CNBC’s analysis of the Dubai crude physical price noted, the Dubai benchmark — which tracks physical delivery from Middle Eastern sellers — is up approximately 76% from pre-war levels, more than twice the paper Brent price increase of approximately 36%. Physical traders who must actually move crude cannot paper over the Hormuz closure; they are pricing the reality of a chokepoint with five vessels per day of throughput against a pre-war average of 138. Paper futures markets, which reset pricing on every diplomatic headline, have oscillated between $95 and $115 based on Trump’s communications — but have not yet incorporated the structural permanence implied by the Iran-Oman governance framework. The Strategic Petroleum Reserve releases (400 million barrels — the largest in history) and the Jones Act waivers (60 days) have prevented a full physical shortage from transmitting into retail fuel prices at maximum velocity. But as analysts warned in late March, those stopgap measures lose their effectiveness in early-to-mid April. The Easter weekend is the boundary of that window. Energy sector positioning heading into Monday’s open needs to account for a Hormuz whose reopening timeline has now become structurally uncertain rather than merely diplomatically delayed.

What the protocol means for the April 6 deadline — and Monday’s open

Trump’s original April 6 deadline — set for Iran to reopen the Strait of Hormuz or face renewed strikes — was already de facto abandoned by his Wednesday night address, which made no mention of it. The Iran-Oman protocol adds a further dimension: even if Trump restores the April 6 deadline in weekend communications, the diplomatic complexity of the Oman arrangement makes a simple “Iran opens the strait” outcome significantly harder to achieve. Oman is a U.S. security partner but also a neutral diplomatic actor that cannot simply be instructed to withdraw from a bilateral agreement it has co-drafted. Any U.S. demand that the Iran-Oman protocol be voided as a condition of a ceasefire must also implicitly demand that Oman abandon an agreement it entered freely — a condition that would alienate a key Gulf partner at a moment when the U.S. already faces strained relations with Saudi Arabia and other Gulf states over the war’s economic consequences.

For Monday’s April 6 market open, the Iran-Oman protocol should be the most important single analytical input for oil pricing — more important than any Trump communication over the Easter weekend, more important than the NFP data, and potentially more important than any ceasefire announcement, because a ceasefire that does not explicitly void the protocol leaves the governance framework in place. The futures session Sunday evening will be the first opportunity for markets to price what the protocol means for post-war Hormuz governance — and that pricing may be the sharpest single repricing event of the conflict if analysts conclude (as Brew’s assessment implies) that Iran has successfully institutionalised a permanent strategic claim over the world’s most critical energy chokepoint. For context on how global oil dynamics filter through to equity markets, Asian overnight markets will be the first to react when Sunday trading opens.