Hormuz at risk: “No ship allowed”

Iran has moved to close the Strait of Hormuz after strikes, with ships receiving VHF radio transmissions attributed to Iran’s Revolutionary Guards stating that “no ship is allowed to pass” , according to an official from the EU naval mission Aspides cited by Reuters. Oil and gas majors, traders and tanker operators suspended shipments through the chokepoint and shipping groups adjusted operations, raising immediate risks for oil and LNG flows, war-risk insurance and regional supply chains.  What happened Following the latest escalation, vessels operating in the Gulf began receiving VHF radio warnings attributed to Iran’s Islamic Revolutionary Guard Corps (IRGC). An official from the European Union’s naval mission Aspides told Reuters that the messages said: “no ship is allowed to pass the Strait of Hormuz.”   In parallel, Reuters reported that energy producers, trading firms and tanker operators halted or delayed shipments through Hormuz, with vessels observed idling near key regional ports such as Fujairah in the UAE.  Bottom line: even without a universally recognized “legal notice,” the combination of transit-denial warnings and commercial suspensions amounts to a de facto closure risk —and markets treat it that way.  Why the Strait of Hormuz matters The Strait of Hormuz is the Gulf’s primary maritime exit to global markets. A significant share of global oil—and large volumes of LNG—move through this narrow corridor. That’s why even short-lived disruption can ripple quickly into: crude and refined-product pricing, LNG delivery reliability, shipping availability and freight rates, and insurance costs (war-risk premiums). Reuters’ reporting noted that disruptions threaten roughly 20% of global oil flows , and highlighted early signs of LNG tanker slowdowns and reversals.  What companies are doing right now Reuters described a fast shift from “rerouting” to “pause and hold”: Oil and gas majors and traders suspended or delayed shipments throu