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

Platform comparison

Market context

Polymarket has this contract at **8% YES** on USDC, so the market is pricing only a low chance that any listed country’s warship is publicly confirmed to transit the Strait of Hormuz before 31 August. Because settlement turns on credible reporting or official confirmation, traders on Polygon are effectively buying conditional tokens against a narrow documentation event, not just a vague rise in naval activity.

The backdrop matters because the strait has already seen repeated military and defensive deployments in 2026. Reuters reported in March that Donald Trump said “many countries” would send warships to keep the waterway open, while later coverage said France, Britain and others were weighing escorts or regional deployments; the UK had already announced a Royal Navy warship for an international defensive mission, and in February Russia, Iran and China said they had sent ships for joint drills in the area.[5][2][1] That history cuts both ways for this market: it shows that warship transits are plausible, but it also means traders need a fresh, country-specific confirmation, not just a general build-up already reflected in the news flow.[15][12]

The main catalysts are official naval scheduling, coalition announcements, and any renewed protection mission tied to commercial shipping. Recent reporting has pointed to Iran warning on routing and route access, while Reuters said European and US forces were still managing the security picture after the June ceasefire and subsequent disruptions.[13][4][18] For Polymarket users, the key question is whether a government, defence ministry or reputable wire can confirm that a named state’s military vessel actually passed through the strait before the close, since support ships and cargo vessels count here but commercial hulls do not.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

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

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like PolyGram trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.