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Geopolitics·Iran Ceasefire

US-Iran nuclear deal by May 31?

icon for US-Iran nuclear deal by May 31?
Geopolitics·Iran Ceasefire

US-Iran nuclear deal by May 31?

May 31

Jun 30

Dec 31

May 31

Jun 30

Dec 31

8% chance
Polymarket

$665,981 Vol.

8% chance
Polymarket

$665,981 Vol.

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.Recent US-Iran talks, including indirect rounds mediated through Oman and Pakistan through early May 2026, have produced no agreement on core nuclear limits despite a reported US memorandum to end hostilities and reopen the Strait of Hormuz. Persistent disagreements remain over the duration of any uranium enrichment moratorium, with Washington seeking extended curbs and Tehran favoring shorter terms, alongside disputes on Iran's existing stockpile of highly enriched material and verification measures. These unresolved issues in the latest diplomatic exchanges, combined with ongoing military tensions and sanctions pressure, have left traders assigning only single-digit implied odds to an official nuclear accord materializing by the May 31 deadline.

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.
Volume
$665,981
End Date
May 31, 2026
Market Opened
Apr 28, 2026, 10:39 PM ET

Resolver

0x65070BE91...
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.
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.Recent US-Iran talks, including indirect rounds mediated through Oman and Pakistan through early May 2026, have produced no agreement on core nuclear limits despite a reported US memorandum to end hostilities and reopen the Strait of Hormuz. Persistent disagreements remain over the duration of any uranium enrichment moratorium, with Washington seeking extended curbs and Tehran favoring shorter terms, alongside disputes on Iran's existing stockpile of highly enriched material and verification measures. These unresolved issues in the latest diplomatic exchanges, combined with ongoing military tensions and sanctions pressure, have left traders assigning only single-digit implied odds to an official nuclear accord materializing by the May 31 deadline.

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.
Volume
$665,981
End Date
May 31, 2026
Market Opened
Apr 28, 2026, 10:39 PM ET

Resolver

0x65070BE91...
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.

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Frequently Asked Questions

"US-Iran nuclear deal by May 31?" is a prediction market on Polymarket where traders buy and sell "Yes" or "No" shares based on whether they believe this event will happen. The current crowd-sourced probability is 8% for "Yes." For example, if "Yes" is priced at 8¢, the market collectively assigns a 8% chance that this event will occur. These odds shift continuously as traders react to new developments and information. Shares in the correct outcome are redeemable for $1 each upon market resolution.

As of today, "US-Iran nuclear deal by May 31?" has generated $666K in total trading volume since the market launched on Apr 29, 2026. This level of trading activity reflects strong engagement from the Polymarket community and helps ensure that the current odds are informed by a deep pool of market participants. You can track live price movements and trade on any outcome directly on this page.

To trade on "US-Iran nuclear deal by May 31?," simply choose whether you believe the answer is "Yes" or "No." Each side has a current price that reflects the market's implied probability. Enter your amount and click "Trade." If you buy "Yes" shares and the outcome resolves as "Yes," each share pays out $1. If it resolves as "No," your "Yes" shares pay $0. You can also sell your shares at any time before resolution if you want to lock in a profit or cut a loss.

The current probability for "US-Iran nuclear deal by May 31?" is 8% for "Yes." This means the Polymarket crowd currently believes there is a 8% chance that this event will occur. These odds update in real-time based on actual trades, providing a continuously updated signal of what the market expects to happen.

The resolution rules for "US-Iran nuclear deal by May 31?" define exactly what needs to happen for each outcome to be declared a winner — including the official data sources used to determine the result. You can review the complete resolution criteria in the "Rules" section on this page above the comments. We recommend reading the rules carefully before trading, as they specify the precise conditions, edge cases, and sources that govern how this market is settled.