The outbreak of conflict in Iran and the closure of the Strait of Hormuz has triggered what the IEA has described as the largest supply disruption in the history of the global oil market. This emergency briefing assesses immediate impacts, cascading knock-on effects across logistics and manufacturing supply chains, and our longer-term outlook for the industry.
At a glance: Strait of Hormuz vessel traffic is down roughly 70%; Brent crude is about $113/barrel (25 March 2026); air cargo capacity in the Middle East and South Asia is down 48% year-on-year; major lines are signalling 15–20% fuel surcharge pressure on top of contract rates.
The Strait of Hormuz: The World’s Most Critical Chokepoint Has Closed
Critical chokepoint. The Strait of Hormuz - through which approximately 20 million barrels of oil per day normally pass, representing roughly 20% of global oil supply - has been effectively closed to commercial traffic following Iran’s directive prohibiting vessel passage. As of 25 March, over 150 ships remain anchored outside the strait, and Iran has conducted 21 confirmed attacks on merchant vessels since the conflict began.
On 28 February 2026, US and Israeli forces launched coordinated strikes on Iranian military and nuclear infrastructure. Iran’s retaliatory actions have escalated into what is now a full regional conflict, with the Islamic Revolutionary Guard Corps issuing directives that have brought commercial shipping in the Strait of Hormuz to a near-standstill.
The International Energy Agency has classified this as the largest supply disruption in the history of the global oil market - surpassing the 1973 Arab oil embargo in terms of the proportion of global supply affected. Approximately 8 million barrels per day of crude and a further 2 million barrels of condensates and natural gas liquids have been cut from global markets.
Timeline
- 28 Feb 2026 - Operation Epic Fury, conflict begins. US–Israeli coordinated strikes on Iranian military, nuclear sites, and leadership structures. Oil markets immediately spike 18%.
- 1–5 Mar 2026 - IRGC declares Strait closed. Iran’s Revolutionary Guard prohibits all commercial vessel transit. Maersk, Hapag-Lloyd, and CMA CGM suspend all strait operations. Vessel traffic falls 70% within days.
- 8 Mar 2026 - Brent crude surpasses $100/barrel. Brent crosses the $100 threshold for the first time since 2022. Prices peak at $126/barrel on 12 March before partial stabilisation.
- 9 Mar 2026 - France launches Operation Aspides. Two frigates deployed to the wider Middle East region to provide escort protection for commercial shipping.
- 25 Mar 2026 - Situation remains critical. Brent trading at $113/barrel. 21 confirmed merchant vessel attacks. No resolution in sight. Supply chain ripple effects spreading globally across all modes.
Oil Price Shock: From $65 to $113 - And Potentially Higher
The speed and scale of the oil price surge has caught many supply chain operators flat-footed. Brent crude has risen from approximately $65/barrel pre-conflict to $113/barrel as of 25 March - a 74% increase in under four weeks. Peak intraday prices reached $126/barrel on 12 March.
| Metric | Value |
|---|---|
| Brent crude (25 Mar 2026) | $113 - ▲ 74% since conflict onset |
| Intraday peak (12 Mar) | $126 - ▲ 94% from pre-conflict level |
| Global oil supply disrupted | ~20% - ~8M bbl/day crude removed |
| Vessels anchored outside strait | 150+ - up from near-zero pre-conflict |
For logistics operators, the immediate practical impact is a dramatic increase in bunker fuel costs for ocean shipping, diesel surcharges across road freight, and jet fuel costs for air cargo - all feeding directly into carrier surcharge announcements expected in the coming days and weeks.
Fuel surcharge alert. Major container shipping lines are expected to announce fuel surcharges of 15–20% on top of existing contract rates. Spot market rates are likely to respond even more sharply. Logistics managers should review open tender obligations and force majeure clauses in carrier contracts immediately.
Diesel and road freight
Diesel prices across Europe and North America are already rising in response to the crude shock. Early pump price data from petrol station networks suggests European diesel has risen 12–18% since the conflict onset. For road freight operators running thin margins on fuel-inclusive contracts, this is an immediate profitability threat. Fuel typically represents 30–40% of total operating costs for a heavy goods vehicle, meaning a 74% rise in underlying crude translates to a 22–30% increase in total cost per kilometre at current pass-through rates.
Cascade Across Every Mode: Shipping, Air, and Road All Hit
This is not an isolated sea-lane disruption. Unlike the Red Sea crisis of 2024, which diverted ships around the Cape of Good Hope, the Strait of Hormuz closure has no commercially viable alternative routing. The Persian Gulf is a cul-de-sac - there is no workaround for cargo originating in or destined for Gulf ports.
Ocean freight
The Strait of Hormuz facilitates approximately 11% of global maritime trade volume and over 30 million TEUs of containerised port traffic annually. All three major Gulf container hubs - Jebel Ali (UAE), Hamad Port (Qatar), and King Abdullah Port (Saudi Arabia) - are experiencing severe congestion as vessels queue outside the strait. Carriers that suspended Red Sea services in 2024 are now facing the dual impact of both diversions remaining active simultaneously.
| Trade lane | Status | Severity |
|---|---|---|
| Asia–Middle East | Near-suspended - all major carriers halted | Critical |
| Europe–Persian Gulf | No commercial transit, military escort only | Critical |
| Transpacific | Rerouting pressure; capacity absorbed by Gulf void | High |
| Asia–Europe (via Cape) | Elevated; Cape route now busiest in history | High |
| Intra-Asia | Disrupted by capacity redeployment | Medium |
Air cargo
Air cargo capacity from the Middle East and South Asia has plunged 48% year-on-year as of mid-March 2026, as airlines have cancelled services, invoked war-risk insurance clauses, and rerouted around Iranian airspace - adding 2–4 hours to many European–Asia routings. This is cascading into a broader air cargo capacity crunch, with demand from time-sensitive electronics and pharmaceutical shippers now competing for a significantly smaller pool of available belly hold and freighter capacity.
Air cargo spot rates on key lanes have already risen 35–55% from January 2026 levels, with further increases expected as restocking demand builds.
Road freight (Europe and Middle East)
Turkey-based overland operators who service routes into Iran and the wider Middle East have suspended operations entirely. Road corridors through Turkey that serve Gulf-bound cargo are experiencing significant disruption, with queuing at border crossings and security concerns halting cross-border movements. European road freight operators are facing diesel surcharges and are increasingly unable to absorb rising fuel costs within fixed contract rates.
Beyond Oil: Semiconductors, Fertilisers, and Aluminium Are Also at Risk
The supply chain consequences of the Iran conflict extend well beyond energy markets. The Middle East is a critical supplier of several materials essential to modern manufacturing that many industry professionals have not yet factored into their risk assessments.
Semiconductor supply chain
Three critical inputs for chip manufacturing are now under supply pressure:
Helium: Qatar produces over one-third of global helium supply. Helium is essential in semiconductor lithography and has no viable substitute. SK Hynix and Samsung have already seen a combined market value decline exceeding $200 billion since the conflict onset, as investors price in the risk of fabrication facility slowdowns.
Bromine: Approximately two-thirds of global bromine - a critical semiconductor manufacturing chemical - comes from Israel and Jordan. Ongoing missile exchanges across the region have disrupted production and export logistics.
Sulphur and sulphuric acid: The Middle East is a major global sulphur producer. Sulphuric acid derived from sulphur is a critical cleaning agent in wafer fabrication. A sustained disruption will begin to affect chip production lead times within 8–12 weeks if alternative sourcing is not secured.
AI infrastructure at risk. AI data centres consume 3–5x more power than standard facilities and are highly dependent on stable, affordable energy. Analysts are forecasting significantly higher operating costs for AI infrastructure globally as power prices rise alongside crude. This creates a secondary risk for technology supply chains already stretched by semiconductor shortages.
Fertilisers and food supply chains
Qatar is a major global producer of ammonia-based fertilisers. Bahrain and Qatar are significant aluminium exporters, supplying global automotive and packaging supply chains. Both have suspended international deliveries to customers. US and European buyers are urgently seeking alternative sourcing from Australia and Southeast Asia - but lead times are extending by 6–10 weeks, and spot premiums are rising rapidly. The World Economic Forum has noted this conflict represents one of the most severe global food and energy security challenges in recent history.
Automotive and consumer electronics
EV battery components and semiconductor deliveries destined for 2026 production runs are currently stranded in Gulf supply chains. Just-in-time manufacturing models - already under stress since COVID-19 - are facing a further test. Several European automotive OEMs have initiated force majeure communications with tier-1 suppliers in anticipation of production line impacts within 4–8 weeks.
Supply chain risk snapshot
| Exposure | Order of magnitude |
|---|---|
| Global helium (Qatar-sourced) | ~⅓ at risk |
| Global bromine (Israel/Jordan) | ~⅔ at risk |
| Air cargo capacity (Middle East / S. Asia YoY) | –48% |
| Window before chip fab slowdowns bite | 8–12 weeks (est.) |
Structural Shifts: What This Means for Logistics Over the Next 12–24 Months
Even in the most optimistic resolution scenarios, the Iran conflict will leave a lasting mark on global logistics and supply chain structures. We identify five structural shifts that logistics leaders should be planning for now:
1. Permanently higher fuel cost baseline
Even if hostilities cease within the coming months, oil markets are unlikely to return to pre-conflict levels quickly. The geopolitical risk premium on Middle Eastern crude has been structurally repriced. Goldman Sachs forecasts Brent remaining above $90/barrel through end-2026 even in a ceasefire scenario, reflecting the lasting damage to investor confidence in regional stability. For logistics operators, this means a new, higher fuel cost floor for budgeting and contract pricing - the era of sub-$70 Brent as a base case is likely over for the foreseeable future.
2. Accelerated supply chain diversification
The concentration of critical material supply in the Gulf region - helium, bromine, sulphur, fertilisers, aluminium - will accelerate the diversification strategies that began post-COVID. Expect significant capital allocation into alternative sourcing infrastructure in Australia, North America, and Southeast Asia. This will extend lead times and increase costs in the near term, but reduce vulnerability over a 2–3 year horizon.
3. Renewed investment in strategic buffer stocks
Governments and large enterprises will accelerate moves toward strategic inventory holding for critical inputs. The just-in-time model - already discredited by COVID disruptions - will face further retreat. Warehousing demand is expected to rise as businesses shift toward just-in-case inventory strategies, creating sustained upward pressure on logistics real estate and 3PL warehouse capacity pricing across Europe and North America.
4. Insurance and risk premium structural reset
War risk insurance premiums for Gulf routing had already risen significantly following Houthi attacks in 2024. They are now being repriced entirely. Marine cargo insurance, war risk surcharges, and freight carrier war-risk premiums are all being restructured. Shippers should expect these cost layers to remain elevated permanently - the insurance market’s modelling of Middle East geopolitical risk has fundamentally changed.
5. Technology investment in supply chain visibility accelerates
Each major disruption since 2020 has driven a wave of investment in supply chain visibility and intelligence platforms. The Iran crisis is likely to prove no different - and its multi-modal nature (affecting ocean, air, road, and critical materials simultaneously) makes the case for integrated, cross-modal visibility more urgent than ever. Organisations that can monitor disruptions in real time and model alternative supply network configurations will have a measurable competitive advantage in navigating the months ahead.
Sygnal One perspective. This event underscores the value of having a single, integrated view of your supply network - across modes, geographies, and supplier tiers. Organisations currently operating with fragmented, siloed data systems are being forced to make critical routing and sourcing decisions without adequate intelligence. The ability to identify exposure, model alternatives, and act faster than competitors is no longer a nice-to-have - it is a survival capability.
GDP Scenarios: How Long Does This Last?
The Oxford Economics and IMF macro modelling on Middle East supply shocks provides a useful framework for assessing duration risk:
| Horizon | Global real GDP growth vs. baseline (approx.) |
|---|---|
| 1 quarter | –0.2 pp |
| 2 quarters | –0.3 pp |
| 3 quarters | –1.3 pp |
Global real GDP growth reduction versus baseline. Source: Oxford Economics / Dallas Federal Reserve modelling, March 2026.
The non-linear jump at three quarters of sustained disruption reflects secondary and tertiary effects - inflation feeding into consumer demand contraction, investment deferrals, and emerging market vulnerability - stacking on top of the direct supply shock. The world cannot afford for this conflict to remain unresolved past Q3 2026.
Modes and materials under pressure
- Ocean - Critical
- Air cargo - Critical
- Road fuel - Severe
- Semiconductors - High
- Fertilisers - High
- Aluminium - High
- Automotive - Elevated
Immediate actions for logistics leaders
- Review all carrier contracts with Gulf routing for force majeure clauses and renegotiation rights.
- Audit critical material inventory levels - especially helium, bromine, and sulphur-dependent supply chains.
- Model alternative sourcing routes for Gulf-dependent inputs. Australia, Malaysia, and US Gulf Coast are priority alternatives.
- Review fuel surcharge pass-through mechanisms in customer contracts before surcharge announcements land.
- Brief senior leadership on GDP and inflation tail-risk scenarios - particularly a three-quarter disruption scenario.
- Engage war-risk insurance brokers immediately - premium repricing is underway and windows are closing.
Disclaimer: This report is produced by Sygnal One Intelligence for informational purposes only. Data points are sourced from IEA, Goldman Sachs, Oxford Economics, Dallas Federal Reserve, ISM, and other publicly available sources as of 25 March 2026. This report does not constitute financial, legal, or operational advice. Supply chain conditions are evolving rapidly; readers should verify current market conditions independently before making business decisions.
Published by Sygnal One, exploring the intersection of data, intelligence, and operational performance in logistics and supply chain.