Attacks on commercial shipping, reports of Iranian naval mines and a sharp rise in oil prices have pushed the Strait of Hormuz back to the centre of global economic risk. With the IEA preparing a major reserve release and shipping firms halting transit, markets are beginning to price in a longer period of instability.
Shipping attacks and mine reports escalate the crisis
Tensions around the Strait of Hormuz escalated sharply this week as multiple commercial vessels were struck. Moreover, Western intelligence indicated that Iran may have laid naval mines in the waterway. Reuters reports that Iran has placed around a dozen mines in the strait, raising fears of a wider maritime confrontation.
The Guardian notes that US forces destroyed 16 Iranian mine‑laying boats, though Washington has not yet agreed to escort tankers through the strait.
The Strait of Hormuz is one of the world’s most critical chokepoints: around 20% of global oil shipments pass through it.
With three merchant ships were struck in recent days — some catching fire and forcing crew evacuations — shipping companies have begun suspending transit.
Shipping disruption widens as insurers raise risk levels
The attacks have triggered immediate commercial fallout. Several major shipping firms have paused operations in the Gulf, citing unacceptable risk levels and uncertainty over naval protection.
Insurers have raised premiums for vessels entering the region. Some operators are now considering rerouting via the Cape of Good Hope. However, this detour adds weeks to transit times and significantly increases costs.
The US military has so far declined requests to escort tankers, according to the Wall Street Journal, leaving shipowners without a clear security framework.
The result is a growing sense that the disruption could last longer than initially expected.
Oil prices surge as IEA prepares major reserve release
Energy markets reacted immediately. Brent crude briefly surged above $100 per barrel, reflecting fears of a prolonged supply disruption.
The International Energy Agency has coordinated a release of 400 million barrels from strategic reserves to stabilise markets — one of the largest emergency actions in recent years.
Analysts warn that if shipping remains constrained, the reserve release may offer only temporary relief. As a result, LNG markets are also on alert. While LNG flows through Hormuz are smaller than oil, any disruption would hit Asian buyers particularly hard.
Iran’s strategy: endurance, disruption and pressure on global markets
Reuters analysis suggests Iran is pursuing a strategy of endurance and controlled disruption, using drones, missiles and energy‑market pressure to stretch US and Israeli resources.
By raising the cost of securing the strait and forcing global markets into volatility, Tehran may be seeking leverage in a conflict where direct military confrontation remains asymmetric.
The attacks also highlight Iran’s ability to influence global supply chains without fully closing the strait. This means that even limited disruption could trigger far more severe international intervention.
Geopolitical implications: convoy debates and market recalibration
Washington and European capitals are now debating whether a convoy system — similar to past Gulf crises — will be required if attacks continue. Such a move would mark a significant escalation and could draw more regional actors into the confrontation.
For now, the US is avoiding direct naval commitments, but pressure is rising as shipping disruptions widen and energy markets remain volatile.
Markets are beginning to price in a prolonged period of instability, rather than a short‑term shock. With shipping halted, insurance costs rising and strategic reserves being tapped, the crisis is shifting from a military confrontation to a broader economic and logistical challenge.
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