US Blockade at Hormuz Shows Mixed Results as Some Ships Pass and Others Turn Back

What Happens Next

• →Oil benchmarks (Brent, WTI) spike 5-15% in the near term as the partial blockade reduces Iranian crude exports, tightening global supply even as some vessels slip through.
• →War risk and hull insurance premiums for vessels transiting the Gulf of Oman and Arabian Sea increase sharply, adding $1-3 per barrel equivalent to shipping costs for Middle Eastern crude.
• →Chinese refiners reliant on sanctioned Iranian oil shipments — such as those carried by vessels like the Rich Starry — face supply disruptions, accelerating their pivot to Russian, West African, or Latin American crude sources.
• →The 22 attacks on transiting ships signal a contested enforcement zone, prompting major container and tanker operators to reroute traffic around the Cape of Good Hope, extending voyage times by 7-10 days and compressing global tanker availability.

Near-term: Brent crude rises 5-15% as Iranian export volumes drop; shipping rates through the region surge due to war risk premiums and vessel rerouting around the Cape of Good Hope. Long-term: Persistent chokepoint risk at Hormuz drives Gulf states to invest heavily in pipeline bypass infrastructure (e.g., expanded East-West Pipeline capacity in Saudi Arabia, UAE's Fujairah terminal expansion), permanently reducing the strait's share of global oil transit.