Navies pledge to secure Strait of Hormuz

Navies promise to secure Hormuz, insurers decide whether ships sail, oil flows depend on pricing risk not patrols

A new round of government pledges to “secure” the Strait of Hormuz is colliding with a simpler constraint: commercial shipping moves when insurers and operators can price the risk, not when politicians announce a mission. Analysts told Business Insider that even with US Navy warships, restoring confidence in Hormuz transit would not be quick, because cheap drones, missiles and mines make chokepoints hard to stabilise and can take weeks or months to counter effectively.

The strait is only about 33 kilometres wide at its narrowest point and carries a large share of global seaborne oil and LNG. That geography concentrates risk: a single minefield, a few anti-ship missiles, or repeated drone strikes can force tankers to slow, reroute, or wait offshore. Naval escorts can reduce some threats, but they do not eliminate the possibility of a hit, and they do not prevent disruption from the mere expectation of one.

That expectation is what underwriters sell. War-risk premiums, hull insurance terms, and charter rates respond to probability and loss severity, and they can change faster than any fleet can clear mines or establish persistent surveillance. A government can declare a corridor “open”; an insurer can still refuse cover, raise premiums to a level that makes a voyage uneconomic, or require conditions that shipowners cannot meet. Ports, too, can tighten acceptance standards, while charterers rewrite contracts to shift liability.

The US Navy’s own problem is arithmetic. Protecting a high volume of tankers demands ships, aircraft and crews that can maintain presence day and night, and it requires specialised mine countermeasures that are slow by design. Meanwhile, the attacker’s cost is low. A handful of drones or a cheap mine can impose delays that ripple through global supply, pushing up prices long before any physical shortage appears.

For European buyers, the transmission mechanism is immediate. If Hormuz risk rises, freight costs and insurance premiums rise with it, and energy traders price future disruption into today’s contracts. Even partial slowdowns can tighten supply chains that already run on just-in-time inventories, turning a security incident into a consumer price story.

Governments still have incentives to talk like they control the sea lanes. A visible naval deployment signals resolve and offers a domestic headline. But the market’s test is quieter: whether a tanker captain can get cover at a price that keeps the voyage profitable.

A warship can escort a ship through Hormuz once. It cannot force an insurer to write the policy for the next one.