US-Iran nuclear deal by May 31?

Platform comparison

Market context

The United States and Iran have not held substantive bilateral nuclear negotiations since the Trump administration withdrew from the Joint Comprehensive Plan of Action (JCPOA) in May 2018. A new agreement would require either a formal return to the JCPOA framework—which Iran has repeatedly stated it would accept if US sanctions are lifted—or a separate bilateral accord addressing uranium enrichment, weapons-grade material stockpiles, and International Atomic Energy Agency (IAEA) inspections. The 18-month window to May 2026 represents a compressed timeframe for diplomacy that typically unfolds over years.

Historical precedent suggests the 9% probability reflects structural barriers rather than mere political distance. The original JCPOA took roughly two years of intensive multilateral talks (2013–2015) to conclude. The 2015 agreement itself collapsed within three years due to US domestic politics. Current US–Iran relations remain adversarial across multiple domains—sanctions architecture, regional proxy conflicts, and domestic political cycles in both capitals—making rapid reversal unlikely. No comparable nuclear agreement has been negotiated and publicly announced within 18 months under comparable conditions of mutual hostility.

Traders should monitor three concrete catalysts: shifts in US presidential or congressional posture toward Iran sanctions relief; IAEA reports on Iranian enrichment levels and compliance status (published quarterly); and any direct diplomatic channel announcements via UN or intermediary states. Recent reporting from Reuters and AP News indicates no active backchannel talks as of late 2024. Programmatic monitoring should flag official statements from the US State Department, Iranian Foreign Ministry, and IAEA Director General as primary settlement signals, given the market's requirement for "publicly announced mutual agreement."

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 App 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 App 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.

What does it cost to trade on Polymarket App UK?

Zero. Polymarket App UK routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

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.

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.