Hormuz Closure: Tanker Attacks and Blockade Shut Down 20% Global Oil Supply

US Iran conflict map highlighting the Strait of Hormuz closure and Persian Gulf of its global oil supply disruption

Table of Contents

The world is facing a massive energy crisis because the Strait of Hormuz, the most important oil route on Earth, is now physically blocked as a consequence of Iran’s situation.

Following missile attacks on several tankers, the waterway is too dangerous for ships to pass. This has trapped 20% of the world’s oil and gas, leaving over 20 million barrels of oil a day with nowhere to go. Without this fuel, global prices could skyrocket, potentially causing a worldwide recession.

Hundreds of Tankers Stranded Due to Maritime Security Risks

The security situation in the Gulf has shifted from high tension to active conflict, rendering the primary trade artery a “no-go” zone for merchant vessels.

To avoid total cargo loss, more than 200 crude and LNG tankers have dropped anchor in open waters, refusing to enter the strait. Ship-tracking data indicates that supertanker transits fell by nearly 80% following the strikes, as naval forces issued broadcast warnings to all commercial traffic. The engine-room fire on a vessel north of Muscat and strikes on US/UK-linked tankers have confirmed that civilian ships are now facing direct kinetic risk in the regional escalation.

Approximately 40 Very Large Crude Carriers (VLCCs), each holding roughly 2 million barrels, are currently idling inside the Persian Gulf, unable to export their cargo to international buyers.

Global Shipping Paralyzed by Kinetic Risks and Rising Costs

Major maritime logistics firms, including Maersk, Hapag-Lloyd, and Mitsui O.S.K. Lines, have officially suspended all transits through the region. This industry-wide withdrawal is driven by a breakdown in the financial landscape and the immediate loss of safety guarantees.

Marine war-risk premiums have surged by 50%, adding up to $750,000 in additional costs per voyage for large container ships. Furthermore, more than 50% of the world’s major maritime insurance clubs have reportedly scrapped coverage for vessels entering the Gulf, making new voyages legally and financially impossible for most operators.

While regional pipelines offer limited bypass options, they lack the throughput capacity to replace the massive volume of energy currently stalled by the blockade, leaving a significant deficit that cannot be moved by land.

Global Economies Face Shortages of Essential Crude and LNG Feedstock

The impact of the closure is most immediate for major downstream importers like India, China, and Japan, which rely on the strait for the vast majority of their petroleum feedstock. Japan and South Korea are the most exposed, sourcing over 80% of their total energy from imports that must pass through this single chokepoint.

 

The halt of Qatari LNG is a critical threat to global power stability; Europe, which replaced Russian gas with Middle Eastern LNG, faces a potential threefold increase in gas prices if the blockade persists. Additionally, Gulf producers can only maintain output for approximately 25 days before regional storage tanks reach maximum capacity. Once saturated, countries with no alternative export routes will be forced to shut down production entirely, leading to a long-term supply-side shock.

TradeInt Solution: Navigating Supply Disruptions with Global Trade Intelligence

When a major chokepoint like the Strait of Hormuz is disrupted, trade patterns shift immediately. Freight routes extend, costs recalculate, and supply timelines become uncertain. The challenge for businesses is understanding where volumes are moving and how exposure is changing across markets.

 

TradeInt delivers global shipment-level data and cross-border trade intelligence to provide clarity amid volatility. Companies can monitor the trade flows, track active exporters and importers, and analyze sourcing concentration by country and product.

 

With TradeInt, businesses can:

 

  • Map supply dependencies linked to high-risk routes.
  • Identify alternative exporting regions with proven shipment history.
  • Evaluate supplier credibility through verified trade records.
  • Track changes in import demand and market share.

 

During periods of geopolitical disruption, actionable visibility into global trade flows allows companies to rebalance sourcing strategies, manage risk exposure, and protect operating margins while trade networks adjust.

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