US-Iran deal physically signed by...?

Prediction market odds and traditional polling measure different things. Polls typically ask the public whether they expect a deal to be signed, capturing broad sentiment but often lacking real financial incentive for accuracy. This market, by contrast, requires traders to stake capital on their forecast, creating a direct penalty for incorrect predictions. Consequently, prediction markets often incorporate forward-looking information and expert analysis more efficiently than polls. While polls provide a snapshot of public opinion, market odds reflect the aggregated judgment of participants with skin in the game, potentially offering a more refined probability estimate for diplomatic outcomes.

On Polymarket, traders set the odds by buying and selling binary outcome shares—one contract for "yes" and one for "no." On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The price of each share fluctuates based on supply and demand, with the current odds displayed as a percentage probability. When more traders buy the "yes" share, its price rises and the implied probability of a signing increases; conversely, selling pressure lowers the price. This continuous price discovery mechanism means the market odds adjust in real time as new information emerges, geopolitical developments unfold, or trader sentiment shifts regarding the likelihood of a physical agreement being signed.

This market resolves around Jun 30, 2026, at which point the outcome is determined by whether a physical signing of a US-Iran nuclear deal has occurred. Resolution is confirmed once the event is verifiable from credible public reporting and official announcements. Traders holding the winning outcome share receive their payout, while holders of the losing share forfeit their stake. The resolution hinges on tangible evidence of a signed agreement—not preliminary negotiations, framework announcements, or unsigned drafts—making the criteria clear and objectively verifiable.

Several catalysts could shift odds significantly before the deadline. Direct diplomatic breakthroughs or public statements from US or Iranian officials signaling imminent agreement would likely boost the "yes" probability. Conversely, escalating sanctions, military tensions, or political leadership changes in either nation could dampen deal prospects. International mediation efforts, IAEA inspections, or statements from European or UN intermediaries may also influence trader sentiment. Domestic political developments—such as US congressional opposition or Iranian parliamentary resistance—could reshape expectations. Media reports on negotiation progress, technical disagreements, or timeline delays will be closely watched, as traders continuously reassess the likelihood of a formal signing within the specified window.