Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via BTC Prediction) Pick polygram.ink (preferred broker) |
96% | 4% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open live market → |
Polymarket (direct) polymarket.com |
96% | 4% | 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 22 | 96% |
| August 25 | 93% |
| August 31 | 83% |
| September 15 | 71% |
| September 30 | 56% |
Market context
The market assesses whether direct US military strikes against Iranian territory will occur between now and 30 September 2026. The definition excludes support for third-party operations, cyberattacks, and strikes on Iranian proxies outside Iran's borders—a narrower trigger than broader regional escalation. At 96% implied probability for continuation, traders are pricing a low likelihood of overt US air or missile action against Iranian soil over the next 21 months.
Historical precedent suggests this confidence may reflect structural constraints on escalation. The January 2020 Soleimani assassination and subsequent Iranian ballistic missile response established a pattern of tit-for-tat strikes followed by de-escalation, with both sides accepting face-saving exchanges rather than sustained campaigns. The April 2024 Iranian drone and missile barrage against Israel, met by limited Israeli strikes on Iranian air defences, reinforced this cycle. No direct US-Iran kinetic exchange has materialised despite multiple flashpoints, suggesting mutual incentives to avoid full-scale conflict despite rhetorical hostility.
Traders should monitor three variables: nuclear negotiations status (JCPOA revival talks remain stalled as of late 2024), regional proxy activity in Iraq and Syria that might trigger US retaliation, and US domestic political transitions heading into the 2024 election cycle and beyond. Reuters and regional security analysts track Iranian missile tests and US carrier deployments as leading indicators. Crypto funding rates on prediction markets typically tighten around major geopolitical announcements; sustained 96% pricing suggests the market views military escalation as structurally unlikely absent a significant triggering event. USDC settlement removes currency-hedging noise, allowing pure event-probability assessment.
Methodology
This page reads US-Iran ceasefire continues through 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
- What are crypto prediction markets?
- Crypto prediction markets are on-chain smart contracts where you buy YES or NO shares on a future crypto event (e.g. "BTC above $100k by year-end"). The market price between 0¢ and 100¢ is the implied probability.
- 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.
- 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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