Iran–Oman Standoff Over Strait of Hormuz Navigation Plan Deepens Shipping Uncertainty

Iran’s push to secure greater control over vessel movements in the Strait of Hormuz, and its rejection of a balanced navigation scheme proposed by Oman, is prolonging uncertainty over one of the world’s key energy and fertilizer corridors. With the internationally recognized traffic separation scheme deemed unsafe due to mines and recent attacks, tanker and bulk movements remain heavily curtailed, keeping freight, insurance and risk premia elevated across oil, LNG and agri‑bulk markets.

The standoff comes on top of a broader security crisis in the Strait of Hormuz, where maritime traffic has collapsed following Iran’s partial closure of the passage and a series of attacks on commercial vessels since late February. UN and IMO data indicate that overall ship movements through the strait have fallen by more than 95% versus pre‑war levels, while an emergency UN‑backed mechanism is being prepared to manage and monitor limited, priority cargoes, initially focused on fertilizers and related raw materials.

Introduction

According to diplomatic and maritime sources, Iran has tabled a temporary arrangement under which one direction of Strait of Hormuz traffic would transit entirely through Iranian territorial waters, while segments of the opposite lane would also fall under Tehran’s jurisdiction. Iranian officials frame the proposal as a security measure in response to US‑Israeli strikes and mine threats, but Tehran has warned that the strait will stay effectively closed if Oman does not accept the plan.

The proposal diverges from Oman’s earlier concept of two distinct corridors that would more evenly split traffic between the two coastal states and from the long‑standing IMO‑adopted traffic separation scheme that historically routed most traffic through Omani waters. That scheme is currently considered unsafe amid confirmed mine risks and repeated attacks, prompting shipping to divert toward a northern route near Iran and a southern passage closer to Oman.

Immediate Market Impact

The unresolved dispute over navigation rules is delaying any broad reopening of the strait and prolonging severe constraints on seaborne energy and bulk flows from the Gulf. The UN‑backed mechanism being developed by IMO, UNCTAD, UNOPS and industry aims initially to prioritize fertilizer and related inputs, underscoring concern about downstream food‑security impacts if fertilizer exports remain trapped.

Crude, condensate and LNG loadings from Gulf producers have already been rerouted where feasible via alternative terminals and pipelines, but capacity is insufficient to fully offset the loss of Hormuz transit. With traffic still largely halted and risk assessments warning of mines, jamming and spoofing of navigation systems, freight and war‑risk insurance premia remain high for voyages linked to the region, embedding higher delivered costs for energy‑intensive agricultural production and processing worldwide.

Supply Chain Disruptions

Port congestion and storage constraints are emerging at Gulf export hubs as cargoes accumulate behind the closed corridor. Security Council and maritime briefings highlight stranded vessels and disrupted energy flows since late February, with hundreds of commercial ships held in or near the Persian Gulf pending safe passage.

For agricultural markets, the key near‑term vulnerability is fertilizer. The proposed UN mechanism explicitly targets fertilizers and related raw materials as priority cargoes, confirming that these shipments have been significantly impeded. Until risk thresholds allow activation of controlled convoys, importers in regions dependent on Gulf‑origin nitrogen and phosphate supplies must contend with longer routes, higher freight, and potential delivery gaps into the next planting cycles.

GNSS interference and mine threats increase voyage times and limit the number of shipowners willing to accept Hormuz exposure at any price, tightening available tonnage in nearby basins. This is feeding into higher spot rates for tankers and, by contagion, for bulk carriers repositioning around the Arabian Sea and Indian Ocean, with knock‑on effects on grains, oilseeds and sugar trades using overlapping fleets and routes.

Commodities Potentially Affected

• Crude oil and condensates – Around 20% of global oil consumption and a quarter of seaborne oil typically transit Hormuz; prolonged closure supports elevated crude benchmarks and refinery margins, indirectly raising agricultural input and transport costs.
• Liquefied natural gas (LNG) – LNG from Qatar and other Gulf producers faces restricted passage, tightening regional gas balances and lifting prices for nitrogen fertilizer production and gas‑dependent food industries.
• Nitrogen and phosphate fertilizers – The UN’s focus on fertilizers in the initial reopening mechanism signals acute disruption risks; longer routes or delayed shipments could affect application rates, yields and crop choices in importing countries.
• Cereals and oilseeds – Direct flows through Hormuz are smaller than for energy, but higher bunker costs and vessel tightness are inflating freight for Black Sea, European and Americas origin grains and oilseeds into MENA and Asia.
• Sugar and edible oils – Refiners and food processors in the Gulf and South Asia face margin pressure from increased logistics costs and potential delays in inbound raw sugar and vegetable oil cargoes routed via neighboring sea lanes.

Regional Trade Implications

Gulf exporters that normally rely on Hormuz – including Saudi Arabia, Iraq, Kuwait, the UAE and Qatar – are accelerating use of alternative pipelines and Red Sea or Arabian Sea terminals where available, but capacity and security constraints limit volumes. Some flows are being reoriented toward buyers willing to accept higher freight and insurance costs, often under longer‑term contracts rather than spot deals.

On the import side, fertilizer‑dependent agricultural economies in South Asia, East Africa and parts of Latin America are most exposed to shipment delays and price spikes. Competing exporters outside the Gulf – notably in North Africa, Russia and North America for fertilizers, and in the Americas and Black Sea for grains and oilseeds – may gain market share as buyers seek more reliable, if sometimes more expensive, alternatives.

Should Iran’s proposal prevail and give Tehran de facto gatekeeping power over key lanes, some importers and shipowners may reassess long‑term reliance on Hormuz‑linked supply chains, accelerating diversification of origin and investment in overland routes and additional export infrastructure elsewhere. However, such shifts will take years, leaving near‑term trade flows highly sensitive to incremental changes in security posture and diplomatic negotiations.

Market Outlook

In the short term, the continued closure of the established corridor and unresolved Iran–Oman dispute imply persistent friction in tanker traffic, supporting elevated risk premia and freight volatility. Any announcement that Oman has accepted or rejected Iran’s plan, or that the UN mechanism for controlled transits is operational, could trigger sharp price moves in crude, LNG, fertilizer and related agricultural markets.

Traders will watch closely for concrete evidence of mine‑clearing progress, activation of IMO‑coordinated evacuation or transit schemes, and changes in the tempo of attacks or incidents reported by maritime security centers. Until safe, rules‑based passage is restored under an arrangement acceptable to both Iran and Oman and backed by international guarantees, markets are likely to price in a structurally higher risk discount on Hormuz‑dependent commodities and shipping services.

CMB Market Insight

The Iran–Oman deadlock over navigation control in the Strait of Hormuz has moved the crisis from a purely military and diplomatic phase into a structural challenge for global commodity logistics. For agricultural markets, the intersection of constrained LNG and fertilizer flows with elevated freight costs constitutes a significant, multi‑link risk to production costs, input availability and delivered prices.

Commodity traders, importers and food industry buyers should treat the current situation less as a transient disruption and more as a regime shift in risk for Hormuz‑exposed flows. Strategic responses include diversifying origin and route options where feasible, building additional inventory buffers ahead of key planting and procurement windows, and actively pricing Hormuz‑related freight and insurance volatility into forward contracting strategies.