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Part of: Iran Oil Shock

Strait of Hormuz closure hits oil, stokes inflation fears

The escalating US-Iran conflict and effective closure of the Strait of Hormuz has created the largest oil supply shock since World War II, sending crude prices soaring and forcing central banks and corporations worldwide to reassess inflation and supply-chain resilience. Markets are bracing for a prolonged disruption.

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Key facts

  • Strait of Hormuz closure is largest oil supply shock since World War II per J.P. Morgan analysis
  • Aramco: global oil markets losing 100 million barrels per week while strait closed
  • US Strategic Petroleum Reserve awarded 53.3 million barrels to traders and refiners including Marathon Petroleum
  • Norden shipping company planning for Hormuz closure to extend through end of 2026
  • China's central bank explicitly warns of imported inflation risks from elevated oil prices

What's happening

The geopolitical impasse over the Strait of Hormuz has crystallized into one of the most significant energy shocks on record. Trump rejected Iran's latest peace offer on Monday, describing the ceasefire as on "massive life support." The effective closure of this vital chokepoint, through which roughly one-third of global seaborne oil passes, has forced the world's largest commodity shipping companies to plan for an extended outage. Norden, one of the world's largest shipping firms, is now assuming the strait will remain closed for the rest of the year, a stark signal of how permanent markets perceive the disruption to be.

WTI crude and Brent have rallied sharply, with oil tankers that managed to exit the Persian Gulf now stranded in the Gulf of Oman. Aramco warned that global oil markets are losing 100 million barrels per week while the strait remains shut, compounding the supply shortage. The US Strategic Petroleum Reserve has already begun releasing 53.3 million barrels to alleviate pressure, yet spot prices remain elevated. China's central bank has issued an explicit warning about imported inflation risk from higher oil and commodity prices. India, meanwhile, is considering emergency measures including curbs on non-essential imports and fuel price hikes to conserve foreign exchange as input costs balloon.

The shock ripples across sectors and geographies. Energy importers face acute margin compression, though energy producers and companies with hedges are capitalizing. Defense stocks and dual-use technology firms are drawing financing; Danske Bank is stepping up defense lending amid rising geopolitical risk. Airlines are under acute pressure; Deutsche Bank noted that low-cost carriers are "ripe for mergers" as fuel costs bite margins. Petrobras, Brazil's state oil firm, missed profit estimates despite the war-driven price surge because it held domestic fuel prices stable to protect consumers. Fertilizer makers like Mosaic are losing out despite soaring input prices because demand destruction from higher agricultural input costs is offsetting margin gains.

The market debate hinges on duration. If the conflict resolves or shipping corridors reopen within weeks, crude could collapse and inflation fears will evaporate. But if the standoff persists through the summer, demand destruction will accelerate globally, forcing central banks to balance inflation fears against growth headwinds. The Strait of Hormuz has become the single largest variable in the macro outlook.

What to watch next

  • 01Iran-US ceasefire negotiations: any breakthrough could reverse oil shock overnight
  • 02Trump-Xi Beijing summit: geopolitical signals from China talks may shift conflict trajectory
  • 03Shipping corridor reports: data on tanker movements and rerouting costs will reveal duration expectations
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