Dueling Hormuz Blockades Push World to the Brink

Why It Matters

The blockade could prolong the oil shock, lift global energy prices and set a risky precedent for freedom of navigation in strategic waterways.

Key Takeaways

• Trump orders US Navy blockade of Hormuz starting April 13.
• Iran imposes tolls up to $2 million per vessel, acting as “marine highwayman.”
• Mine‑clearing operations begin as Iran’s mines remain unlocated.
• Global oil prices surged above $120/barrel; 80% of regional food imports disrupted.
• Lack of allied support makes US unilateral action legally vulnerable under UNCLOS.

Pulse Analysis

The Strait of Hormuz, a narrow 21‑nautical‑mile channel, carries roughly 20% of the world’s oil and LNG shipments. After failed diplomatic talks in Islamabad, President Trump’s decision to impose a naval blockade marks a dramatic escalation, echoing the US’s 1980s interventions that kept the waterway open during the Iran‑Iraq war. While the United States has not ratified the United Nations Convention on the Law of the Sea (UNCLOS), the convention’s provisions on innocent passage are widely regarded as customary international law, making the legality of a unilateral blockade highly contested.

Economically, the blockade reverberates far beyond the Persian Gulf. Brent crude futures have surged past $120 per barrel, and the price spike is expected to linger into late 2026 as shippers remain wary of renewed hostilities. The strait also underpins more than 30% of global urea exports and handles the majority of food imports for Gulf states; with over 80% of regional food shipments delayed, the risk of a broader food‑security crisis is mounting. Mine‑clearing operations by US Central Command add operational costs, while Iran’s tolls of up to $2 million per vessel further strain shipping margins.

Geopolitically, the lack of coordinated allied backing isolates Washington’s stance. The United Kingdom, France and other partners are pursuing a multilateral freedom‑of‑navigation coalition, which would carry stronger legal footing under UNCLOS. Legal scholars suggest the dispute could be taken to the International Court of Justice, though Iran’s non‑acceptance of compulsory jurisdiction complicates enforcement. A precedent allowing a bordering state to monetize or militarize an international strait could embolden similar claims elsewhere, notably in the Taiwan Strait, reshaping the rules that govern global maritime trade.