Which countries will send warships through the Strait of Hormuz by August 31?

Platform comparison

Market context

The market is really about whether any named state can be shown to have sent a warship through the Strait of Hormuz before 31 August, and the recent baseline is that such transits are politically sensitive but not unprecedented. In March, Reuters reported Donald Trump urging countries including China, France, Japan, South Korea and Britain to contribute ships, while other coverage said France had a carrier group positioned for the region and Britain had sent HMS *Dragon* nearby to help secure the waterway if needed.[5][8] Earlier this year, Iran and partners also conducted joint naval drills involving warships in the area, which underlines that military presence in and around the strait has been active rather than hypothetical.[2]

For traders, the key question is not whether the strait stays open, but which governments actually commit a vessel transit and whether that is confirmed by official or broadly credible reporting. Reuters and other outlets have already described European preparations to dispatch vessels if the security picture allows, and recent reports on 4 August said Iran was warning US warships over route changes, suggesting the maritime picture is still fluid.[4][12] That matters because the market resolves on confirmed transits, so watch for defence ministry statements, task-group departures, and voyage tracking around any convoy or escort mission; if a country merely signals support without an actual passage, that will not count.[13][18]

The crowd’s 8% YES implies the market is leaning towards no new qualifying warship transit by the deadline, despite the precedent of wartime or escort deployments this year. A useful comparison is the earlier May market on the same theme, which priced in repeated US Navy activity and allied deployments but still finished No, showing that headlines about plans or proximity often do not convert into the specific documented transit the contract requires.[17]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Sports-specific comparison page for Which countries will send warships through the Strait of Hormuz by August 31?. Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi or Manifold.

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