Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Prediction Today) Pick polygram.ink (preferred broker) |
35% | 65% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
35% | 65% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| December 31 | 35% |
| September 30 | 12% |
| August 31 | 3% |
| August 18 | 2% |
| August 13 | 1% |
| June 30 | 0% |
| July 31 | 0% |
Market context
The latest change is that US and Iranian officials have already put a written framework on the table, with mediators saying it maps out a 60-day path towards a final agreement rather than a full nuclear settlement. Reuters reported on 12 June that a signing in Europe was being discussed, and by mid-June AP said the parties had signed an initial pact that starts a 60-day negotiation period, which matters because this market only pays on a *qualifying written diplomatic instrument* signed or adopted by the deadline, not on talk of progress alone.[9][15][17]
For a read on the current 0% crowd price, the closest comparison is the 2015 JCPOA process: there was a long runway of interim understandings, technical drafts, and staged concessions before any final instrument was reached. Even this year’s February Geneva round was described as “progress” with “general guiding principles”, but Reuters and Axios both stressed that major issues — especially enrichment, verification, and sanctions relief — still needed resolution before a true agreement existed.[4][6][10] That history suggests the market is unlikely to move on rhetoric unless the text is signed, adopted, and clearly covers the nuclear file in a formal diplomatic instrument.
The near-term catalysts are procedural rather than rhetorical: any published signing text, an official US or Iranian readout confirming mutual signature, or a new round of talks with dates and venue attached. Watch for whether the 60-day clock is extended by mutual consent, since the reported framework allows that and a delay would push resolution risk beyond the original timetable.[1][7][12] Reuters’ June reporting also flagged Europe as a possible signing location, so any announcement from Geneva or another European host would be the clearest trigger for repricing.[9][17]
Methodology
This page reviews US-Iran Final Nuclear Deal by…? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Prediction Today, which mirrors the Polymarket order book at 0% fees.
Resolution & payout
At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.
On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.
UK Frequently Asked Questions
- Where can I trade this market with the lowest fees?
- Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Prediction Today. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.
- 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.
- 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%.
Trade US-Iran Final Nuclear Deal by…? on Prediction Today
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