Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via BTC Prediction) Pick polygram.ink (preferred broker) |
63% | 37% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open live market → |
Polymarket (direct) polymarket.com |
63% | 37% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open live market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open live market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open live market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open live market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| August 31 | 63% |
| August 15 | 30% |
Market context
Iran and Oman are still trying to turn a temporary shipping arrangement in the Strait of Hormuz into something more durable, but the latest reporting shows the deal remains conditional rather than finished. Reuters said on 8 August that Iran and Oman were “very close” to an agreement, while also noting Tehran’s own warning that reopening depended on other conditions, including U.S. compensation demands.[5] BBC and Bloomberg both reported that Iranian officials had said the route details were in the final stages and that a joint statement was under review, but neither source described a signed, fully settled accord.[1][7]
The recent price action in this market looks anchored to a familiar pattern: fast probability repricing on headline progress, then pushback when the fine print becomes visible. Earlier Reuters reporting in June described only a joint working group and continued consultations with other littoral states, while later pieces showed Oman’s regional-management proposal being rejected by Iran and replaced with a narrower bilateral counterproposal.[4][13][14] That sequence matters for prediction-market traders because the contract needs an *official agreement* that actually sets maritime obligations; a verbal breakthrough or draft text alone may not be enough if one side has not formally accepted the terms.[1][6][8]
The main catalysts are any joint statement from Muscat or Tehran, an Iranian foreign ministry briefing, or a Reuters/BBC follow-up confirming that both governments have signed off on the same text.[1][5][7] Traders should also watch for references to the scope of the arrangement: whether it merely assigns a temporary lane, or whether it clearly establishes policies on navigation, fees, monitoring, and traffic management as the contract requires.[3][16] Given the market’s USDC settlement, any headline that sharpens the odds on a signed diplomatic instrument should feed through quickly, while the wider BTC/ETH move only matters insofar as it alters risk appetite and cross-market liquidity rather than the settlement criterion itself.
Methodology
This page reads Iran-Oman Hormuz Management Agreement by 2026? on-chain. Polymarket's quote comes directly from the Polygon order book — the only comparable venue with on-chain settlement. Kalshi (USD, off-chain), Betfair (GBP/EUR, off-chain) and Manifold (play-money) are listed alongside for venue context. Every CTA routes to BTC Prediction, which mirrors the Polymarket order book directly.
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.
UK Frequently Asked Questions
- Why USDC and not ETH or USDT?
- USDC is the Polygon standard — audited reserves (Circle, monthly attestation), deepest order book, low gas costs. ETH volatility would distort probability quotes; USDT has thinner Polygon liquidity than USDC.
- What does a transaction cost on Polygon?
- Polygon gas is typically under $0.01 per transaction. A full trade cycle (Approve + Order + Fill) totals around $0.03 — compared to $5-50 on Ethereum mainnet.
- Is Polymarket legal in the UK?
- Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.
- Do I pay tax on prediction market profits in the UK?
- UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.
- How do I deposit on Polymarket from the UK?
- UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.
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