Iran Conflict Triggers Multi-Commodity Supply Crisis as 14 Million Barrels Per Day Shut In
Strait of Hormuz closure halts half the world's seaborne sulphur trade, threatens 3.5 million tonnes of aluminum output, and embeds permanent geopolitical risk premium in energy futures.
Iran’s closure of the Strait of Hormuz has shut in 14 million barrels per day of crude oil—12% of global supply—while triggering cascading failures across sulphur, aluminum, and fertilizer markets that threaten food security for 360 million people and embed a permanent geopolitical risk premium in commodity pricing.
The conflict, which began with U.S.-Israeli strikes on February 28, 2026, escalated to a maritime blockade by March 4. Within weeks, tanker traffic through the Strait collapsed 70%, stranding 20,000 mariners and forcing Gulf producers including Saudi Arabia, Iraq, Kuwait, and the UAE to halt exports for lack of storage capacity. By late May, cumulative production losses had reached 700 million barrels, according to data compiled by the International Energy Agency, with projections pointing toward 1 billion barrels lost before the market stabilises.
Energy Markets Price in Structural Premium
Brent crude peaked at $144 per barrel in April before moderating to $105.29 as of May 18, embedding a 40-point geopolitical risk premium that traders now treat as structural rather than temporary. The U.S. Energy Information Administration projects refinery throughput will plunge 4.5 million barrels per day in Q2 2026, with annual averages down 1.6 million bpd for the full year. Global oil inventories drew 129 million barrels in March and 117 million in April, forcing IEA members to release 400 million barrels from emergency reserves.
Vitol CEO Russell Hardy warned in late April that demand destruction had already reached 4 million barrels per day, telling the FT Commodities Global Summit that further cuts would be necessary if the Strait remained closed.
“We’ve borrowed supply … But you can’t do that forever. There are recessionary consequences from having to ration that demand.”
— Russell Hardy, CEO, Vitol
Sulphur Shortage Threatens Fertilizer Production
The conflict’s most acute secondary impact lies in sulphur markets. Approximately 50% of globally traded sulphur moves through the Strait of Hormuz, with production concentrated in Gulf refineries that are now shut. Sulphur prices surged 35-40% within weeks while sulfuric acid—critical for phosphate fertilizer production and copper refining—jumped 30%, according to analysis from the Modern War Institute.
The fertilizer cascade intensified as nitrogen-based products saw parallel supply shocks. Urea prices jumped from $400-490 per metric tonne to around $700 (FOB Egypt) within three weeks, while diammonium phosphate (DAP) approached $800 per tonne. Sarah Marlow, global head of fertilizer pricing at Argus, told CNBC in late March that the region accounts for nearly 50% of globally traded sulphur, one-third of urea, and 25% of ammonia.
The World Food Programme estimates 360 million people faced acute food insecurity in 2026 even before the conflict. An additional 45 million are now at risk if the war extends to mid-2026 with oil sustained above $100 per barrel. Yara’s CEO warned in early May that approximately 500,000 tonnes of nitrogen fertilizer was no longer being produced—capacity that could eliminate 10 billion meals per week globally if the crisis persists. Yield losses for nitrogen-intensive crops could reach 50%.
Aluminum Supply Chain at Breaking Point
On March 28, Iranian drone strikes damaged Emirates Global Aluminium’s Al Taweelah smelter and Aluminium Bahrain’s (Alba) facility—two plants representing a combined 3.5 million tonnes of annual capacity. Both declared force majeure, with EGA estimating full restoration would take 12 months. Aluminum prices on the London Metal Exchange surged 6% to $3,492 per tonne within days, with analysts projecting a test of $4,000 if the Strait remains closed through Q2.
The Gulf’s 9% share of global aluminum production creates structural constraints for electric vehicle battery casings and semiconductor packaging. Compounding the problem, sulphur shortages disrupt high-pressure acid leaching (HPAL) processes used to extract nickel and cobalt hydroxide—key battery feedstocks. Copper processing across Africa faces similar bottlenecks, with Ivanhoe Mines CEO Robert Friedland warning that traders were already struggling to source sulphuric acid and that prices would “significantly increase across Africa,” per E&E News.
Supply Chains Realign Toward Atlantic Basin
India exemplifies the strategic pivot underway. New Delhi diversified crude imports from 20 to 40 countries within weeks, with 70% now sourced outside the Strait of Hormuz compared to 55% pre-conflict, according to the Institute for Energy Economics and Financial Analysis. Increased volumes from the U.S., Africa, and Latin America replaced Gulf barrels. Globally, Atlantic Basin exporters including the U.S., Brazil, Canada, Kazakhstan, and Venezuela increased shipments to Asia by 3.5 million barrels per day since February, the IEA reported in May.
Morocco’s state phosphate producer OCP has emerged as a key alternative supplier, shipping 90,000 tonnes of MAP/TSP to Latin America in April at $800-820 per tonne—a record premium signaling structural tightness, per NORIA Research. Russian and Chinese export restrictions on Fertilizers have compounded the supply shock, creating what analysts describe as a triple constraint on nitrogen, phosphate, and sulphur availability.
Stagflation Vector Emerges
The conflict has revived comparisons to the 1970s oil shocks. Refining margins are compressing as crude costs spike while product demand weakens, squeezing petrochemical and plastics sectors. Energy-intensive industries face production cuts even as input costs for fertilizers, metals, and chemicals climb. The IMF cut its global GDP growth forecast from 3.3% in January to 3.1% in April, warning of adverse scenarios if oil remains above $100 per barrel.
The World Economic Forum catalogued nine non-oil commodities affected by the closure, including methanol (used in formaldehyde and plastics), synthetic graphite (battery anodes), and helium. Qatar’s Ras Laffan LNG complex—representing 20% of global LNG capacity and one-third of helium output—suffered drone damage on March 3, with QatarEnergy declaring force majeure the following day. Helium prices doubled from $300 to $600-900 per thousand cubic feet.
- Geopolitical risk premium now structural component of energy pricing, not transitory volatility
- Fertilizer scarcity threatens 2026-27 crop yields and embeds food inflation through 2027
- Aluminum/nickel/copper constraints create multi-year bottleneck for EV and semiconductor supply chains
- Refining margin compression accelerates consolidation in petrochemical sectors
- Supply chain diversification favours U.S., India, Morocco producers but at higher cost basis
What to Watch
The June IEA Oil Market Report, expected in early June, will provide updated demand destruction estimates and revised supply forecasts as Atlantic Basin flows stabilise. Monitor fertilizer pricing through the Northern Hemisphere planting season—any sustained elevation above $650 per tonne for urea signals structural scarcity extending into 2027 harvests. EGA’s restoration timeline for Al Taweelah will determine whether aluminum markets test $4,000 per tonne or find equilibrium through Chinese production ramp-ups. Finally, track India’s LNG import mix: with 52% of contracts affected by force majeure, New Delhi’s success in diversifying gas supplies will signal whether Asian buyers can sustainably bypass Hormuz or remain structurally exposed to Middle Eastern chokepoints.