Iran's Islamic Revolutionary Guard Corps Navy seizes or detains at least one foreign-flagged commercial vessel in or near the Strait of Hormuz or the Gulf of Oman between 18 October and 15 November 2026, as confirmed by Iranian state media, the vessel's owner/flag state, or UKMTO.
Posted 2026-10-17 — 29 days before the deadline, stated before the outcome.
The claim
Iran's Islamic Revolutionary Guard Corps Navy seizes or detains at least one foreign-flagged commercial vessel in or near the Strait of Hormuz or the Gulf of Oman between 18 October and 15 November 2026, as confirmed by Iranian state media, the vessel's owner/flag state, or UKMTO.
Reasoning trace
- Trump says a US Navy blockade has stopped all Iranian ships from crossing Hormuz
- Iran loses its own export route and wants to impose reciprocal costs on Western-linked shipping
- In 2019, after Grace 1 was seized at Gibraltar, the IRGC seized the Stena Impero within about two weeks; in 2023 Iran seized the Advantage Sweet after a US tanker seizure
- Iran retaliates against the shipping blockade by tit-for-tat vessel seizure rather than direct naval confrontation with the US
Evidence so far
5 confirming · 0 denying signals · 6 verified · 0 broken assumptions. The evidence itself is part of the full dossier.
Probability history
Updated 19 times since mint (last on 2026-11-04) — 19% at mint → 84% today.
What to watch
- leading indicator UKMTO publishes a maritime safety alert or bulletin reporting an IRGC Navy vessel intercepting or detaining a foreign-flagged commercial ship in the Strait of Hormuz or Gulf of Oman.
- leading indicator UKMTO or the vessel's flag state publishes a distress or seizure alert for a specific foreign-flagged commercial vessel in the Strait of Hormuz or Gulf of Oman.
- milestone Iranian state media reports a specific IRGC Navy patrol operation or interception of a foreign vessel in the Strait of Hormuz or Gulf of Oman.
The full dossier behind this prediction — the evidence trail, the risk analysis, the monetization scenarios — is available on request: [email protected].
Probabilities are calibrated against the system's own resolved history; after the deadline the outcome is resolved and audited — including the calls we get wrong. Nothing on this page is investment advice.