How Tanker Insurance Became the Real Blockade of Hormuz

Key Takeaways

• Only 5-9 tankers transited Hormuz in first 48 hours post‑truce
• Over 230 loaded oil tankers remain queued inside the Gulf
• War‑risk insurance remains unavailable, halting commercial voyages
• P&I clubs and US reinsurance backstop are still under negotiation
• Iran retains strategic leverage despite leadership changes

Pulse Analysis

The ceasefire that began on April 7 was intended to thaw the deadlock in the Strait of Hormuz, yet the data tells a different story. MarineTraffic, Kpler and S&P Global logged just a handful of transits in the first two days, compared with the pre‑conflict flow of more than 100 vessels daily. This dramatic drop has left roughly 230 oil‑laden tankers idling in the Persian Gulf, while Brent crude slipped to $94.75 per barrel and WTI to $94.41 – still well above the February baseline but far from pre‑war stability. The limited movement underscores how fragile the supply chain remains, even as diplomatic rhetoric suggests a reopening.

At the heart of the stalemate is war‑risk insurance, the silent veto that determines whether a vessel can legally and financially navigate the contested waters. Underwriters have yet to issue meaningful coverage, and the International Group of P&I Clubs has not confirmed the status of protection and indemnity policies. Meanwhile, the U.S. International Development Finance Corporation’s reinsurance backstop is still under negotiation, leaving ship owners hesitant to commit hulls without clear risk mitigation. This insurance gap translates directly into market uncertainty, as carriers prioritize asset protection over political directives, effectively throttling oil flow regardless of any ceasefire.

Strategically, Iran emerges with heightened leverage despite the loss of Ayatollah Khamenei, as the blockade remains a potent bargaining chip. Tehran’s control over the narrow lanes and mined zones near Larak Island gives it the power to dictate terms, compelling global buyers and insurers to reckon with heightened geopolitical risk. The prolonged insurance impasse may force the industry to explore alternative routes or invest in new risk‑transfer mechanisms, while policymakers grapple with the broader implications for energy security and regional stability. The outcome will shape oil pricing, supply chain resilience, and the future of diplomatic engagement in the Middle East.