Strait of Hormuz Closure Sends Shockwaves Through US Shipping Industry

The US shipping industry is confronting a severe disruption to global supply chains following Iran's closure of the Strait of Hormuz, a narrow but critical waterway through which approximately one-fifth of the world's oil supply passes each day.

Senior commanders of Iran's Revolutionary Guard announced the strait was closed to all vessel traffic in the wake of US and Israeli military strikes, warning that any ship attempting to pass would be targeted. The declaration has prompted major logistics and shipping companies to halt or restrict bookings through the region, with analysts warning of cascading effects on American consumers.

Experts say that if major carriers restrict bookings and reroute vessels around Africa's Cape of Good Hope, weeks would be added to global shipping schedules, effectively removing significant capacity from the system.

The closure threatens supplies of oil, aluminium, sugar and fertiliser, with energy markets already responding sharply to the news. Insurance broker Marsh predicted that shipping insurance prices could rise by as much as 50% in the days immediately following the closure, with insurers cancelling existing policies and offering cover only at substantially renegotiated rates.

The disruption arrives at a particularly sensitive moment for US importers. Container volumes at major American ports were already forecast to fall sharply this spring, with March import cargo projected at 1.79 million TEUs — down nearly 17% year-on-year — as tariff uncertainty suppressed demand.

Economists warn the combination of slower growth and higher inflation that could result from a prolonged closure — known as stagflation — would present a complicated challenge for the Federal Reserve as it attempts to bring inflation down to its 2% target.

The US has established a maritime warning zone across the broader region, with airlines also suspending flights across the Middle East as the conflict continues to escalate.