Who will attend a round of US-Iran peace talks by December 31?

Platform comparison

Market context

The question turns on whether senior US and Iranian officials will sit down for formal peace negotiations within the next two years. The 12% implied probability reflects deep scepticism about the likelihood of such talks materialising, given the current state of bilateral relations and the domestic political constraints on both sides.

Historical precedent offers mixed signals for reading this odds. The 2015 Joint Comprehensive Plan of Action (JCPOA) negotiations involved sustained, high-level engagement across multiple rounds, but that process unfolded under conditions markedly different from today: the Obama administration had made nuclear diplomacy a centrepiece of its foreign policy, and Iran's government faced economic pressure from sanctions. By contrast, the Trump administration withdrew from the JCPOA in 2018, and subsequent efforts at dialogue have stalled. The Biden administration pursued indirect talks through intermediaries (notably Oman) but never achieved a return to the negotiating table. No formal round of direct, senior-level peace talks has occurred since 2015. The consensus pricing at 12% suggests traders view a reversal of this trajectory as unlikely absent a significant shift in either administration's strategic calculus.

Catalysts to monitor include changes in US political leadership following the 2024 election, Iranian domestic political developments, and any escalation or de-escalation in regional proxy conflicts. The International Institute for Strategic Studies noted in early 2024 that both governments remain rhetorically opposed to direct talks under current circumstances. Any formal announcement of scheduled negotiations, mediation by a credible third party, or a major shift in regional tensions could rapidly alter the probability, but the baseline expectation remains one of continued diplomatic distance through 2026.

Methodology

We track Who will attend a round of US-Iran peace talks by December 31? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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

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 Who Will Win. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

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%.