Oil Prices Surge as Trump Revives Iran Blockade and Proposes Hormuz Charge

Key Takeaways

• Brent crude settled at $83.30 a barrel on July 13, up 9.6%, while WTI rose 9.4% to $78.14.
• President Trump said the US would reinstate a naval blockade on Iran and seek a 20% reimbursement on cargo passing through the Strait of Hormuz.
• The proposal added uncertainty around shipping, insurance costs and near-term oil supply availability.
• Before the conflict, the Strait of Hormuz handled roughly one-fifth of global daily oil and LNG supplies.
• Further moves in crude prices are likely to depend on tanker traffic, the scope of the blockade and whether diplomatic tensions ease.

Oil Prices Surge as Hormuz Shipping Risks Return

Oil prices climbed sharply after renewed US-Iran tensions raised fresh concerns about energy shipments through the Strait of Hormuz, a major route for global crude oil and liquefied natural gas flows.

Brent crude futures settled at $83.30 a barrel, gaining $7.29 or 9.59%, while US West Texas Intermediate crude settled at $78.14, up $6.73 or 9.42%. Brent closed above $80, while WTI finished just below that level after its strongest daily advance in months.

Crude Prices Reprice Rising Supply Risks

The move reflected a sharp reassessment of geopolitical risk rather than a change in underlying oil demand alone. Traders reacted to reports that a renewed US naval blockade would cover Iran’s coastline, ports and oil terminals, raising the prospect of further disruption to regional shipping.

President Donald Trump said the US would reinstate the blockade and seek reimbursement at a 20% rate on cargo shipped through the Strait of Hormuz. He also suggested that Washington could take a leading role in protecting passage through the waterway.

The proposed charge has created uncertainty because the practical mechanism, scope and legal basis of any payment requirement have not been detailed. A UN shipping agency opposed mandatory tolls for international straits, adding another layer of operational and legal risk for shippers.

Why the Strait of Hormuz Matters for Oil Prices

The Strait of Hormuz remains a critical chokepoint for global energy markets. Before the conflict, it carried around one-fifth of the world’s daily oil and LNG supplies, meaning that reduced tanker traffic can quickly affect expectations for available crude exports.

Even without a full interruption to physical supply, slower vessel movements, higher insurance costs and longer shipping routes can increase the effective cost of delivering oil to consumers. This is why crude prices can rise quickly when military activity or political statements create doubts over safe transit.

Market participants are likely to watch inbound tanker volumes closely. A sustained reduction in traffic could point to a more direct supply problem, while an improvement in shipping flows may reduce the geopolitical premium built into Brent and WTI prices.

Blockade Details and Iranian Response Remain Key

The US Navy-led Joint Maritime Information Center reportedly said the blockade would begin on July 14 and apply broadly across Iranian maritime infrastructure. Iran, however, has rejected US involvement in managing the Strait of Hormuz and warned against unauthorised intervention.

That stand-off leaves oil markets highly sensitive to further developments. A clear and credible arrangement that supports commercial transit could ease immediate supply fears. Conversely, further attacks on vessels, ports or energy infrastructure could intensify concerns about exports from the Gulf.

For now, the market reaction shows that traders are pricing a higher risk of short-term disruption rather than assuming that supplies will immediately disappear.

Broader Oil Fundamentals Could Limit or Extend the Rally

The latest rise comes after a period in which supply expectations had placed downward pressure on crude prices. In its July outlook, the US Energy Information Administration forecast Brent at an average of $74 per barrel in the third quarter, based on expectations of recovering production and trade flows following earlier diplomacy.

That outlook was published before the latest escalation. It provides a reminder that oil prices remain influenced by both geopolitical events and broader fundamentals such as inventories, production recovery and demand growth.

If commercial traffic through Hormuz remains constrained, the renewed risk premium could keep crude prices elevated. If tensions ease and vessels resume more normal transit patterns, prices may retreat as traders refocus on supply growth and softer demand expectations.

What Traders Are Watching Next

The immediate focus will be on confirmed shipping activity through the Strait of Hormuz, official details of the proposed US measures and any signs of diplomatic de-escalation.

Brent’s close above $80 highlights the market’s sensitivity to disruption risks. WTI’s move towards $80 also signals stronger concern, although its lower settlement relative to Brent reflects the greater direct exposure of seaborne international supply to Hormuz shipping conditions.

Oil markets can remain volatile while the situation develops, particularly as headlines around military action, tanker movements and policy responses continue to emerge.