Global oil prices jumped 12% since last Friday as the U.S. reinstated a blockade on Iranian exports, sparking renewed volatility in the Strait of Hormuz. Brent Crude climbed toward $85 per barrel, while WTI Crude neared the $80 mark, according to market data, as geopolitical tensions effectively ended the relative calm of mid-June.
Strait of Hormuz Supply Risks and Price Volatility
The sudden surge in prices follows a breakdown in the cooling of hostilities between Washington and Tehran. While mid-June saw a memorandum of understanding aimed at negotiating a deal, those efforts have stalled. According to market observations, the market is now pricing in the reality that oil transit through the Strait of Hormuz faces significant, ongoing disruption.
On Tuesday, Brent Crude futures reached $84.89 per barrel, a 1.91% increase in Asian trade. Simultaneously, WTI Crude rose 2.02% to $79.72 per barrel. This rally builds on an 8% jump recorded on Monday following the official U.S. announcement to reinstate the blockade.
Did you know?
The Strait of Hormuz is one of the world’s most vital maritime chokepoints.
The Proposed 20% ‘Guardian’ Fee
Market analysts are currently assessing the feasibility of a proposal from President Trump to charge a 20% fee on vessels using the Strait of Hormuz. The administration suggests this fee would cover the costs of the U.S. providing safety and security in the region.

ING commodities strategists Warren Patterson and Ewa Manthey noted in a Tuesday report that details regarding the implementation of this fee remain scarce. From a cost-analysis perspective, the impact would be substantial. A supertanker carrying 2 million barrels of crude at $80 per barrel would face a fee of approximately $32 million, effectively adding $16 to the cost of every barrel.
For context, this proposed $16 per barrel levy is significantly higher than the $1 per barrel toll previously sought by Iran, highlighting the potential for a massive shift in maritime shipping economics.
Comparison: Market Costs
- Iranian-proposed toll: ~$1 per barrel
- U.S. proposed ‘Guardian’ fee: ~$16 per barrel
Future Trends for Crude Benchmarks
The market is currently operating under a “war risk premium” that has replaced the optimism of previous weeks. Traders are closely monitoring the viability of the U.S. blockade and the potential for retaliatory measures from Iran that could further constrict supply lines.
As noted by ING strategists, the market is struggling to reconcile the “Guardian” proposal with standard international maritime operations. With the U.S. benchmark attempting a breakout above $80, the near-term trend remains upward as long as the diplomatic status remains frozen.
Frequently Asked Questions
Why are oil prices rising so rapidly?
Prices are rising due to the reinstatement of the U.S. blockade on Iranian oil exports and increased geopolitical risk in the Strait of Hormuz, which creates uncertainty regarding the security of global supply chains.

What is the proposed 20% fee for the Strait of Hormuz?
The fee, proposed by President Trump, is intended to charge vessels for the costs associated with the U.S. providing security in the region. Analysts estimate this could add roughly $16 per barrel to shipping costs.
How does the current price compare to last week?
Oil prices are currently 12% higher than they were on Friday.
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