US-Iran Final Nuclear Deal by…?

Platform comparison

Market context

The underlying event is a June 2026 US–Iran written framework that opened a 60-day path towards a fuller nuclear settlement, but not yet a finished final deal. Reuters reported on 12 June that a signing ceremony for the initial memorandum could happen in Europe and that the 60-day negotiation period would begin only after signature, while AP later described the arrangement as an initial pact that starts talks rather than closes them.[8][13]

That distinction matters for how to read the market. Historical comparisons here are not to the 2015 JCPOA alone, but to earlier near-deals in which interim understandings produced headlines without a binding end-state; even in February, Reuters and other outlets were still describing the talks as advancing but with little sign of compromise on enrichment and verification.[10][5] Against that backdrop, a 0% crowd price looks far lower than the newsflow would suggest, yet it also reflects the contract’s stricter standard: a qualifying written instrument must be mutually signed or formally adopted by 31 August, not merely discussed or announced.[8][13]

The key catalysts are the next formal documents, not further general statements. Traders should watch for any signed text, an adopted protocol, or confirmation that working groups on sanctions, nuclear affairs, reconstruction, and monitoring have produced a draft capable of meeting the market’s wording.[15] Reuters’ pre-signing reporting and later AP coverage suggest the main dependency is whether Washington and Tehran convert the June framework into an instrument that is final enough for settlement before the deadline; absent that, the market stays anchored to “No”.[8][13]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Best Prediction Markets UK, which mirrors the Polymarket order book directly.

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.

UK Frequently Asked Questions

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.

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 Best Prediction Markets UK trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

What are the best prediction markets for UK traders in 2026?

For UKGC-regulated markets: Betfair Exchange (sports, politics) and Smarkets (sports, politics, lower commission than Betfair). For broader global event prediction: Polymarket (deepest liquidity, 0% fee, USDC settlement). For US-regulated option: Kalshi (USD, limited UK payment options). Most serious UK traders use a combination of Betfair for regulated sports and Polymarket for broader markets.