US-Iran nuclear deal before 2027?

Platform comparison

Market context

The underlying event is a formal, publicly announced bilateral or multilateral agreement between the United States and Iran addressing nuclear research and weapons development. The market settles affirmatively if such an accord is reached by 31 December 2026, regardless of ratification timelines or implementation dates. The 76% crowd probability reflects expectation that diplomatic channels will produce a deal within the next two years, despite the absence of active negotiations at present.

Historical precedent shapes interpretation of this probability. The Joint Comprehensive Plan of Action (JCPOA), negotiated in 2015 under the Obama administration, took roughly two years of intensive multilateral talks to conclude. The Trump administration's 2018 withdrawal and subsequent "maximum pressure" sanctions regime created a structural break in US–Iran nuclear diplomacy. The Biden administration has pursued indirect talks via intermediaries since 2021, with no breakthrough; however, the market's high probability suggests traders anticipate either a shift in US policy following the 2024 election, Iranian willingness to re-engage, or both. The compressed timeframe—roughly 24 months—mirrors the JCPOA negotiation duration, providing a loose historical anchor.

Key catalysts include statements from the incoming US administration regarding Iran policy, any resumption of direct or indirect talks, and Iranian domestic political developments. The International Atomic Energy Agency's quarterly reports on Iranian nuclear activities influence diplomatic pressure. Traders should monitor announcements from the US State Department, Iranian foreign ministry statements, and IAEA Board of Governors meetings. Recent geopolitical tensions in the Middle East, including Israeli military actions, typically constrain diplomatic momentum, though the market's probability suggests traders expect de-escalation or compartmentalisation of negotiations from regional conflicts.

Methodology

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

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Where can I trade this market with the lowest fees?

On Polymarket Tax UK, which mirrors the Polymarket order book at 0% fees. 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.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Polymarket Tax UK triggers a quick verification flow that finishes in minutes.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.