US-Iran nuclear deal by May 31?

Resolution Criteria

This market will resolve to "Yes" if an official agreement over Iranian nuclear research and/or nuclear weapon development, defined as a publicly announced mutual agreement, is reached between the United States and Iran by May 31, 2026, 11:59 PM ET. Otherwise, this market will resolve to “No”. If such an agreement is officially reached before the resolution date, this market will resolve to "Yes", regardless of if/when the agreement goes into effect. Agreements that include the United States and Iran as parties, even if they also involve other countries (e.g., a multilateral deal like the JCPOA), will qualify for resolution. The primary resolution source for this market will be an official announcement by the United States and/or the Islamic Republic of Iran, however an overwhelming consensus of credible reporting confirming an agreement has been reached will also qualify.

Prediction markets place the probability of a US-Iran nuclear deal being reached by 31 May 2026 at a very low level, with trading heavily concentrated on a 'No' resolution. The market requires an official, publicly announced mutual agreement on Iranian nuclear research or weapons development between the two governments before that deadline. Volume is overwhelmingly skewed against a deal materialising within the timeframe.

Market structure

This is a binary yes/no market resolving on whether a formal US-Iran nuclear agreement is publicly announced by 31 May 2026, 11:59 PM ET. Trading is heavily concentrated on 'No', with only a marginal share backing a 'Yes' outcome. Multilateral arrangements, such as a revived JCPOA involving additional parties, qualify for resolution. The primary resolution source is an official announcement by either government, with an overwhelming consensus of credible reporting serving as a fallback.

Background

Negotiations over Iran's nuclear programme have been a defining feature of Middle Eastern diplomacy for more than two decades. The 2015 Joint Comprehensive Plan of Action (JCPOA), agreed between Iran and six world powers including the United States, placed limits on Iranian uranium enrichment in exchange for sanctions relief. The United States withdrew from the agreement in 2018 under the Trump administration, reimposing sweeping sanctions. Subsequent efforts to revive the deal during the Biden administration stalled without conclusion. Since then, Iran has significantly advanced its uranium enrichment capacity, complicating any return to prior constraints. The question of whether a new or revived agreement can be concluded within a compressed diplomatic window is what this market addresses.

Key factors

Several structural factors shape whether a deal could be reached before the deadline. The pace and format of any ongoing direct or indirect negotiations between Washington and Tehran is the most immediate variable; talks conducted through intermediaries have historically moved slowly. Domestic political constraints in both countries matter considerably — hardline opposition in Iran's political establishment and scepticism in the US Congress can each delay or derail formal agreements. The status of Iran's enrichment activities affects the scope of concessions either side would accept, as does the broader regional security environment, including the posture of Gulf states and Israel. Sanctions architecture also plays a structural role: the relief Iran requires may not be deliverable through executive action alone, potentially requiring Congressional involvement that extends timelines. Any military escalation, diplomatic rupture, or major geopolitical shift in the region could either accelerate urgency or remove the conditions necessary for agreement.

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