Polymarket

Polymarket Predicts Low Probability for US-Iran Nuclear Deal by May 31 Amid Stalled Talks

A Polymarket prediction market shows extremely low odds for a US-Iran nuclear deal by May 31, 2026, reflecting ongoing disagreements and Iran's insistence on deferring nuclear discussions from current ceasefire negotiations.

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— 3 min read

The prediction market platform Polymarket is currently hosting a high-stakes market asking, "US-Iran nuclear deal by May 31?" With a substantial trading volume of over $4.2 million, the market's current prices reflect a stark outlook: a mere 6.7% probability for a 'Yes' outcome, indicating that traders overwhelmingly expect no official agreement on Iranian nuclear research and/or nuclear weapon development to be reached by the May 31, 2026, 11:59 PM ET deadline.

This market's resolution hinges on a publicly announced mutual agreement between the United States and Iran concerning nuclear matters. While the past few weeks have seen a flurry of diplomatic activity and conflicting reports, the core issue of Iran's nuclear program remains a significant sticking point, casting a long shadow over the prospects of a quick resolution.

Recent Developments and Lingering Disagreements

Recent reports suggest that the U.S. and Iran are "getting a lot closer" to finalizing a broader peace agreement or a Memorandum of Understanding (MOU) to end months of conflict. This emerging framework primarily focuses on establishing a ceasefire, reopening the crucial Strait of Hormuz, and discussing sanctions relief. A fragile ceasefire has been in place since April 7, 2026, and a proposed MOU aims to extend this for another 60 days, allowing for further negotiations on outstanding issues.

However, a critical divergence exists regarding the inclusion of nuclear issues in any imminent deal. While some sources indicate that Iran has agreed in principle to dispose of its highly enriched uranium, Iranian officials have publicly and explicitly denied that nuclear issues are part of the current memorandum talks. Iran maintains that its nuclear program is for civilian purposes and has not publicly committed to halting uranium enrichment or removing its stockpiles.

U.S. President Donald Trump has emphasized that any final deal must be "great and meaningful" and explicitly stated that the U.S. will not sign an agreement unless Iran relinquishes its highly enriched uranium. Secretary of State Marco Rubio also noted that while "some progress" has been made, nuclear talks are "highly technical matters" that cannot be rushed. President Trump further indicated on May 25 that he had advised representatives "not to rush into a deal" and that "time is on our side," later adding on May 27 that the U.S. is "not satisfied" with the current progress.

Market Odds Reflect Skepticism

The Polymarket odds, with a 93.3% chance for a 'No' resolution, clearly reflect the deep skepticism among traders that a comprehensive nuclear deal will be announced by May 31. This sentiment is bolstered by expert opinions. As noted by "Trader Claude's" on May 25, the market's "No" thesis is strengthened by Iran's Foreign Ministry explicitly confirming that the nuclear program is not part of current negotiations, which are instead focused on a Strait of Hormuz ceasefire and sanctions relief framework.

The market's strict definition requiring an official, publicly announced agreement on nuclear research and/or nuclear weapon development means that a deal focused solely on a ceasefire or sanctions relief, which defers nuclear discussions to a later stage, would not qualify for a 'Yes' resolution. Given that current discussions appear to be centered on an MOU that would extend a ceasefire and address issues like the Strait of Hormuz and sanctions, with nuclear matters potentially postponed for a 60-day negotiation period beyond the May 31 deadline, the market's low probability for a 'Yes' seems well-justified.

With only days remaining until the resolution date, and both sides still far apart on the critical nuclear component, the likelihood of a last-minute, publicly announced nuclear agreement appears exceedingly slim.

Sources:

Market data fetched at 2026-05-28 12:18 UTC | Polymarket ID: 2111640

This article is generated by AI for informational purposes only. It does not constitute financial advice. Always do your own research before making any investment decisions. Data sourced from Polymarket and public web sources.

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