Will 2026 ships transit the Strait of Hormuz on any day by May 31?

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Market context

The Strait of Hormuz remains the world's most critical chokepoint for oil transit, with roughly one-fifth of global petroleum passing through its narrow waters daily. This market hinges on whether daily ship arrivals at the strait will reach a specified threshold on any single day between now and end-May 2026, as tracked by IMF Portwatch. The 11% implied probability reflects the rarity of extreme single-day transit spikes under normal conditions; typical daily arrivals hover between 20–40 vessels, with weather, seasonal patterns, and geopolitical friction all influencing flow.

Historical data shows that sustained disruptions—whether from military tensions, sanctions enforcement, or accident-driven blockages—tend to create backlog effects that eventually manifest as elevated single-day transit counts when passages resume. The January 2024 Houthi attacks on shipping prompted temporary rerouting but did not fundamentally alter Hormuz throughput for extended periods. Comparable precedent includes the 2022 Russia–Ukraine conflict, which redirected some flows but did not trigger the kind of sustained closure that would force an abnormal surge in Hormuz transits once reopened.

Traders should monitor geopolitical flashpoints in the Gulf, particularly US–Iran relations, Israeli–Iranian escalation, and any new sanctions regimes that might restrict tanker movements. IMF Portwatch publishes daily figures with a lag; sudden announcements of military exercises, port closures, or shipping insurance changes can shift expectations rapidly. Funding rates on energy-linked perpetuals and spot crude prices often signal market anticipation of supply-chain disruption before Hormuz transit data materialises, making macro crypto positioning a useful leading indicator for this contract's resolution path.

Methodology

Methodologically this overview focuses on on-chain pricing: Polymarket's live mid comes from the Polygon conditional-token order book and settles automatically in USDC. The other three venues — Kalshi, Betfair, Manifold — are listed with their platform attributes, because they operate off-chain and a 1:1 comparison of contract mechanics isn't possible.

Resolution & payout

Settlement is on-chain via UMA Optimistic Oracle. A proposer posts the outcome with a bond, a two-hour dispute window opens, then the smart contract lifts winning conditional tokens to 1 USDC and sends payments to holders' wallets automatically. No withdrawal fees beyond Polygon gas.

Off-chain venues (Kalshi, Betfair, Smarkets) settle in local fiat through bank-side clearing — faster than SWIFT, slower than on-chain. Manifold pays no real cash.

FAQ

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 does it cost to trade on BTC Prediction?

Zero. BTC Prediction routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

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?

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

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.