Which countries will send warships through the Strait of Hormuz by June 30?

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Market context

The Strait of Hormuz remains the world's most critical chokepoint for energy transit, with roughly one-fifth of global oil passing through its 21-nautical-mile width daily. Military vessels from numerous nations routinely navigate these waters as part of freedom-of-navigation operations, regional security patrols, and counter-piracy missions. The question of which countries will send warships through by mid-2026 hinges on whether current geopolitical tensions sustain naval activity at present levels or whether de-escalation reduces transit frequency.

Historical precedent suggests the 4% probability significantly underestimates likely outcomes. The US Navy conducts regular carrier strike group transits; European navies (British, French, German) have maintained consistent presence since 2019 in response to tanker attacks and regional instability. Australia, Japan, and India have all sent warships through in recent years as part of Indo-Pacific security posturing. Between 2020 and 2024, at least six major naval powers conducted documented transits annually. A 96% "No" outcome would require an unprecedented diplomatic settlement or explicit closure—neither scenario has credible near-term catalysts.

Traders monitoring this market should track official naval announcements from regional commands, particularly US Fifth Fleet schedules and European naval task force deployments. Recent statements from Iran regarding strait restrictions, any escalation in Houthi attacks on shipping, or formal agreements between Gulf states and major powers would shift probabilities materially. Programmatically, conditional orders tied to news feeds reporting "warship transit" language from Reuters, AP, or official military sources would capture resolution signals efficiently, though the high base rate of existing traffic suggests the market's current pricing reflects either extreme risk aversion or incomplete historical data integration.

Methodology

We track Which countries will send warships through the Strait of Hormuz by June 30? on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

Where can I trade this market with the lowest fees?

On Polymarket Review UK, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket Review UK is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Polymarket Review UK triggers a quick verification flow that finishes in minutes.