Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Bot UK) Pick polygram.ink (preferred broker) |
22% | 78% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Place a position → |
Polymarket (direct) polymarket.com |
22% | 78% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Place a position → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Place a position → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Place a position → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Place a position → |
Market context
The Strait of Hormuz has still been operating well below normal, and this market resolves only when IMF Portwatch’s 7-day moving average of ship arrivals reaches at least 60, so the practical question is whether weekly throughput can sustain a pre-crisis level rather than merely spike for a day. Reuters reported in April that traffic was running at less than 10% of typical volumes, while later reporting in June said flows had improved after a preliminary US-Iran agreement but remained far below pre-war levels and vulnerable to renewed disruption.[5][8]
For context, the key reference point is that normal conditions are broadly around 60 commercial transits a day, which is why traders are watching for a durable return to that band rather than a symbolic reopening.[6] In early April, some trackers showed only a handful of vessels a day, and even after a ceasefire-related reopening, New York Times reporting said the flow quickly fell back to near standstill, underscoring how fragile recovery can be when insurance, security, and port scheduling are still unsettled.[9][11]
A power-user would treat this as a data-feed problem: monitor IMF Portwatch publication timing, compare the 7-day average against the 60 threshold, and automate alerts for any sustained move above the line. The main catalysts are diplomatic changes, ceasefire enforcement, naval or mine-clearing developments, and any fresh attacks on commercial shipping; ABC reported on 30 June that renewed strikes had exposed the fragility of the ceasefire, even as some analysts still saw a possible return towards near-normal traffic by September if attacks stopped.[10] For a bot or conditional-order setup, the most useful trigger is not headline sentiment but the published Portwatch series crossing and holding above the settlement rule.
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
- 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.
- What does Polymarket cost to trade?
- Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.
- Do I need to KYC for this market?
- On Polymarket directly, no — it's wallet-based. Intermediary brokers like Polymarket Bot UK 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.
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