US announces new Iran agreement/ceasefire extension?

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Market context

The crowd is pricing an 85% chance that the United States will formally announce an extension of its ceasefire with Iran, or a new diplomatic framework preserving that ceasefire, before the specified deadline. This reflects confidence in continued de-escalation following the November 2024 mutual agreement to halt direct military operations after months of tit-for-tat strikes.

Historical precedent suggests caution at this probability level. The 2015 Joint Comprehensive Plan of Action (JCPOA) commanded similar market confidence before the Trump administration withdrew in 2018, whilst the 2020 ceasefire following Soleimani's assassination lasted only weeks before renewed tensions. More recently, the November 2024 ceasefire itself emerged from brinkmanship rather than structured negotiation, meaning formalisation into an "extension" or "new agreement" requires institutional buy-in that remains uncertain. The gap between a de facto ceasefire and an officially announced extension is material—the former can persist through tacit understanding, whilst the latter demands public commitment and domestic political cover from both capitals.

Catalysts warrant close monitoring. Any Israeli military action in Iranian territory or escalation in proxy conflicts (Yemen, Syria, Iraq) could collapse negotiations before announcement. Conversely, statements from the incoming Trump administration regarding Iran policy will carry outsized weight; the transition period through January 2025 creates ambiguity about whether Washington will endorse or repudiate the November framework. Reuters reported in December that indirect talks were ongoing through Omani intermediaries, but no timeline for formalisation has been disclosed. The 85% probability may underestimate the friction required to move from ceasefire maintenance to public announcement.

Methodology

This page reviews US announces new Iran agreement/ceasefire extension? across five venues. We show live odds for Polymarket-based markets (sourced from the Polygon order book); for other venues we list platform attributes, since the comparable contracts are not exposed via a public API on every venue. Every CTA points at PolyGram — the application we operate, where you trade directly against the Polymarket order book at 0% fees.

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

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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'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.

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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.