Polymarket

US-Iran Peace Deal by May 31: Polymarket Odds Reflect Deep Divisions Amid Last-Minute Diplomacy

A Polymarket predicting a permanent US-Iran peace deal by May 31, 2026, currently shows a low 16.5% chance of 'Yes,' despite intense, last-minute diplomatic efforts. Key sticking points, particularly Iran's nuclear program and US sanctions, continue to overshadow 'slight progress' in negotiations.

Admin

— 4 min read

The prediction market on Polymarket, 'US x Iran permanent peace deal by May 31, 2026?', currently reflects significant skepticism, with the 'Yes' outcome trading at 0.165 (16.5% implied probability) against a dominant 'No' at 0.835. This market is set to resolve if a permanent peace deal, explicitly indicating a lasting end to military hostilities, is formally agreed upon by the specified deadline of May 31, 2026, 11:59 PM ET. The low odds underscore the profound challenges in bridging decades of animosity and recent conflict between Washington and Tehran.

This market holds substantial geopolitical and economic significance. A permanent peace deal would not only de-escalate tensions in a volatile Middle East but also have far-reaching implications for global energy markets, given Iran's critical role in oil production and its control over the Strait of Hormuz. The ongoing conflict has already sent global fuel prices soaring.

Intensified Diplomacy Amidst High Stakes

Recent days have seen a flurry of diplomatic activity, suggesting a concerted effort to reach an agreement before the deadline. Pakistan's Army Chief, Field Marshal Asim Munir, and a Qatari delegation have been actively mediating in Tehran, engaging with Iranian Foreign Minister Abbas Araghchi and other officials. US Secretary of State Marco Rubio acknowledged "slight progress" in talks, but cautioned against over-optimism, stating, "There's more work to be done."

Reports indicate the United States has presented its latest peace proposal, which Iran is currently reviewing. Details emerging from sources like American journalist Alex Marquardt suggest the US offer includes significant financial concessions for Iran, such as economic funds for war damages, waivers on oil sales, gradual unfreezing of funds, and sanctions relief. Crucially, the proposal aims to immediately end military operations and secure a commitment from Iran not to develop nuclear weapons. However, it reportedly postpones detailed discussions on nuclear enrichment and the removal of enriched material to a later "final deal."

Persistent Sticking Points and Hardline Resistance

Despite the diplomatic push, major sticking points remain. Iranian Foreign Ministry spokesperson Esmaeil Baghaei has been unequivocal, stating that a deal would not be reached if the US insists on discussing Iran's existing stockpile of enriched uranium, labeling such demands "unreasonable" and "excessive." Iran's primary demands focus on a definitive end to the war, the lifting of all sanctions, the release of frozen assets, and the cessation of the US naval blockade on Iranian ports. The official Iranian news agency Nour News, close to Iran's Supreme National Security Council, quoted Baqaei on May 21, 2026, confirming Iran was reviewing the US proposal but emphasizing their initial 14-point framework called for a "definitive end" to hostilities.

Adding to the complexity, hardline factions within Iran have expressed hostility towards negotiations, viewing them as a potential precursor to renewed conflict. Furthermore, a UN conference reviewing the Nuclear Nonproliferation Treaty ended on May 23, 2026, without agreement, partly due to US and Iranian disagreements over Iran's nuclear program, with Iran refusing a provision stating it "can never seek, develop or acquire any nuclear weapons."

Market Odds and Expert Divergence

The Polymarket odds of 16.5% for a 'Yes' outcome reflect the daunting task of achieving a permanent peace deal, with explicit language signaling a lasting end to military hostilities, within the extremely tight timeframe of just over a week. While US President Donald Trump indicated on May 21, 2026, he was willing to wait "a couple of days" for Iran's response, the short window for such a comprehensive agreement is a significant hurdle.

Further complicating the outlook, sources indicate the Trump administration is simultaneously preparing for a fresh round of military strikes against Iran, though no final decision has been made. Senator Roger Wicker has also publicly urged President Trump to reject any deal and renew military action against Iran. This dual track of diplomacy and military readiness highlights the fragile state of relations.

Interestingly, an adviser to the UAE president offered a more optimistic perspective on May 22, 2026, suggesting a "50-50 chance" of a US-Iran peace agreement, provided it addresses the root causes of regional instability. However, this contrasts sharply with the market's current assessment, which leans heavily towards a 'No' resolution, implying that while temporary de-escalation might occur, a definitive, permanent peace deal by May 31, 2026, remains highly improbable given the deep-seated disagreements, especially on nuclear issues and sanctions, and the short timeline for resolution.

Sources:

Market data fetched at 2026-05-23 06:16 UTC | Polymarket ID: 1919425

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.

Read more