In brief
Polymarket's 'Iran agrees to surrender enriched uranium stockpile by...?' market currently implies an 88% probability that no agreement will be reached by December 31, 2026. Among the three possible 'Yes' dates, December 31 is the most likely at 7.5%, followed by October 31 (3.6%) and August 31 (0.8%). Recent reporting indicates Iran remains unwilling to permanently surrender its enriched uranium, making a deal before year-end unlikely.
Introduction
The question of whether Iran will publicly agree to surrender its enriched uranium stockpile has been a central issue in the ongoing conflict between the U.S. and Iran. Since the outbreak of war in February 2026, diplomatic efforts have oscillated between military strikes and negotiations, with the Strait of Hormuz reopening often taking precedence over nuclear disarmament. This Polymarket event tracks the specific condition of Iran agreeing to transfer, ship, or place its enriched uranium under external control, excluding Iranian-aligned groups. As of mid-August 2026, no such agreement has been announced, and the market reflects deep skepticism.
What to know
The market resolves to 'Yes' if Iran publicly agrees to surrender its enriched uranium stockpile by March 31, 2026, 11:59 PM ET (though the listed outcomes extend to later dates, indicating the market has been updated). The resolution relies on credible reporting. Key facts from verified sources:
- Iran still possesses a significant enriched uranium stockpile. The New York Times reported on August 7, 2026, that Iran stores about 970 pounds of uranium enriched to 60% near Isfahan, enough for 9-10 atomic bombs. Source
- Negotiations have focused on reopening the Strait of Hormuz, with the U.S. and Oman closing in on an interim agreement, according to Axios (August 5). However, that deal does not necessarily include uranium surrender. Source
- President Trump has signaled willingness to end the war without a nuclear deal, per the Wall Street Journal (August 9). Iran has demanded billions in payments, troop removal, and an end to the naval blockade. Source
- Iran has indicated it might accept a long suspension of enrichment and give up its most highly enriched stockpile, but not permanently surrender its right to enrich, according to Majalla (August 14). Source
- Iran's enriched uranium was partially destroyed in the June 2025 airstrikes, and Iran has not resumed enrichment this year, per Legis1 (August 13). However, remaining stockpiles still exist. Source
- The U.S. has used nearly all its long-range precision missiles during the war, complicating further military options, as noted by CBS News (August 5). Source
The market numbers
| Outcome | Implied Probability |
|---|---|
| December 31 | 7.5% |
| October 31 | 3.6% |
| August 31 | 0.8% |
| No (implied) | 88.1% |
Total volume: $17,755,602. Total liquidity: $235,782. Market closes December 31, 2026.
The factors at play
- U.S. willingness to compromise: The WSJ (Aug 9) reports Trump is willing to accept a scaled-back objective (reopening Hormuz) without a nuclear deal, reducing pressure on Iran to surrender uranium.
- Iran's high demands: Iran seeks billions in payments, U.S. troop withdrawal, and an end to the blockade, as per WSJ. Such conditions make a quick deal unlikely.
- Iran's red line on permanent surrender: Majalla (Aug 14) and BBC (Jul 21) indicate Iran may accept temporary measures but not permanent forfeiture of enrichment rights.
- Destruction of stockpile: Legis1 (Aug 13) notes that much of Iran's enriched uranium was destroyed in strikes, but remaining stockpiles still exist and could be used as leverage.
- Time pressure: The August 31 deadline is only 15 days away; the 0.8% probability reflects near-impossibility. October 31 and December 31 are more plausible but still low.
- Internal Iranian politics: The Majalla article mentions that Iran's leadership is playing a waiting game, possibly hoping for a change in U.S. administration or policy.
Our prediction
According to our analysis, the most likely outcome is December 31. Polymarket currently assigns a probability of 7.5%, while our internal estimate is 5%. The difference stems from these factors: the market may overestimate the chance of a deal by year-end given Iran's consistent refusal to permanently surrender its stockpile, and the U.S. appears willing to accept a less comprehensive agreement. However, if any deal materializes, it is more likely to occur later in the year as negotiations drag on, making December 31 the most probable date among the three.
Risks and uncertainties
- Sudden breakthrough: A surprise agreement could occur if Iran's leadership decides to accept terms under extreme pressure or if the U.S. offers significant concessions.
- Change in U.S. strategy: A shift in Trump's approach, such as renewed military strikes, could force Iran to negotiate.
- Internal Iranian collapse: Economic or political instability might push Iran to accept a deal.
- IAEA inspections: If Iran allows inspections and the stockpile is verified, a surrender agreement could be announced quickly.
- Misinterpretation of market rules: The market's resolution criteria are specific; a partial agreement or temporary custody might not qualify, leading to a 'No' even if progress is made.
Conclusion
The Polymarket event reflects deep skepticism that Iran will agree to surrender its enriched uranium stockpile by the end of 2026. While December 31 is the most likely date for a potential deal, the overall probability remains low. Traders should monitor developments in Hormuz negotiations and any shifts in Iran's public stance.
This content is for informational purposes only and does not constitute financial, political or investment advice, betting advice, or any operational recommendation.