Short Answer

Iran will not agree to surrender its enriched uranium stockpile by December 31, as high-level negotiations remain stalled and no active agreement exists for this commitment. The market prices this outcome at 7.0%.

1. Market Behavior & Drivers

The market's probability dropped one percentage point on September 1, 2026, coinciding with confirmation that a prior interim agreement had failed. A June 2026 deal, the "Islamabad memorandum," which aimed to resolve the "disposition" of Iran's enriched uranium, had unraveled without implementation. Reports from early September confirmed the collapse of those negotiations and stated the Trump administration had no interest in returning to the memorandum's terms.
This development solidified the already low probability of a comprehensive agreement. The market price, which had been static at 7.5%, adjusted downward to 6.5% following the news. The price action occurred on zero traded volume, indicating the shift reflects an update based on external information rather than new trading activity or a change in market sentiment.
  • Since last update (~28d): The August 31 outcome resolved "no," removing it from active consideration.
  • Our model decreased by 2.5pp for October 31, tracking the market's 5.0pp drop.
  • The market for December 31 decreased by 2.0pp, with our model tracking this 1.0pp lower.
  • Overall, the edge between our model and the market compressed by 1.0pp.
  • Iran's surrender of enriched uranium remains unlikely; no active agreement as of September 1, 2026.
  • The June 17, 2026 MOU committed nations to negotiate, not surrender, enriched material.
  • IAEA reports minimal change; verification of a stockpile typically takes 6-12 months post-agreement.

Who Wins and Why

Outcome Market Model Why
October 31 2.0% 1.0% No active agreement for Iran to surrender its uranium stockpile exists, and negotiations remain stalled.
December 31 7.0% 3.5% No active agreement for Iran to surrender its uranium stockpile exists, and negotiations remain stalled.

Current Context

As of September 1, 2026, Iran has no agreement to surrender its enriched uranium stockpile. A June 2026 interim agreement, known as the "Islamabad memorandum," aimed to resolve the "disposition" of highly enriched uranium through a mutually agreed mechanism [1]. However, this deal quickly unraveled without implementation, and its terms, which envisioned no stockpiling and material either handed to the IAEA or diluted, were never finalized due to the collapse of negotiations [1]. The Trump administration explicitly states it has no interest in returning to the June 2026 interim memorandum [2]. Meanwhile, Iranian President Masoud Pezeshkian continues to call for a return to the June 2026 memorandum, pledging reciprocity if the U.S. does so [2]. Tensions remain high following renewed U.S.-Iran hostilities at the start of September 2026 [2].
Iran maintains a significant enriched uranium stockpile within the country. Iranian officials state that the material remains in Iran, largely reported as being "under the rubble" following military strikes in June 2025 [3]. The International Atomic Energy Agency (IAEA) estimates Iran’s enriched uranium stockpile includes approximately 184.1 kg of UF6 enriched up to 20% and 440.9 kg of UF6 enriched up to 60% [3]. While U.S. and Iranian officials have engaged in multiple negotiation rounds, including the 2026 memorandum, these talks have faced significant setbacks. Key demands, such as the removal of all enriched material from Iran, have not been met as of September 2026 [4].
Sources (4)
  1. 1Iran's nuclear program still must be negotiated after initial deal | AP Newsapnews.com
  2. 2Iran President Urges The U.S. To Return To Earlier Interim Peace Dealforbes.com
  3. 3Iran and Nuclear Weapons Production | Congress.gov | Library of Congresscongress.gov
  4. 4Iran and Nuclear Weapons Productioncongress.gov

2. Price Chart

Historical Price (Probability)

Outcome probability
Date

3. Market Data

Contract Snapshot

A "Yes" resolution occurs if Iran publicly agrees to surrender any portion of its enriched uranium stockpile by the specified deadline (e.g., October 31, 2026, 11:59 PM ET). This agreement must involve transferring custody or control of the stockpile outside Iran's influence, excluding non-state armed groups or Iranian-aligned organizations. A "No" resolution is triggered if these conditions are not met, and agreements merely to limit or cap enrichment levels do not qualify. The prediction market offers several distinct contracts with varying deadlines, including October 31, 2026, December 31, 2026, April 30, 2026, May 31, 2026, and June 30, 2026, all resolving at 11:59 PM ET based on a consensus of credible reporting.

Available Contracts

Market options and current pricing

Outcome bucket Yes (price) No (price) Last trade probability
October 31 $0.02 $0.98 2%
December 31 $0.07 $0.94 7%

Market Discussion

As of September 2026, no final or implemented agreement exists for Iran to surrender its highly enriched uranium (HEU) stockpile [1][2][3]. While U.S. officials and President Trump suggested an "in-principle" agreement for Iran to surrender or relinquish its HEU stockpile in May 2026, Iranian officials consistently denied agreeing to hand over the material, citing national sovereignty [1][4][5][6][7].

Sources (7)
  1. 1Trump says Iran’s enriched uranium would go to US under emerging dealynetnews.com
  2. 2Possible U.S.-Iran Agreement: INARA and U.S. Sanctionscongress.gov
  3. 3Iran and Nuclear Weapons Productioncongress.gov
  4. 4Iran Reportedly Accepts Surrender Of Enriched Uranium Under Emerging Agreement With US - Next India Magazinenextindiamagazine.com
  5. 5Iran Reportedly Agrees To Surrender Uranium Stockpile — Independent Journal Reviewijr.com
  6. 6Iran Signals Willingness to Relinquish Enriched Uranium as Trump Nears Nuclear Accord – [your]NEWSyournews.com
  7. 7Has Iran agreed to surrender enriched uranium and...wionews.com

4. Trust Index

Octagon Trust Index Polymarket 65 Caution

Order book is critically thin.

Primary risk· Trade quality

How it adds up
Integrity80% of score69Caution
Trade quality20% of score46High Risk

Includes the cost to trade: a $1,000 order can't be filled here because the order book is too thin.

Trust score65Caution

Weighted blend with hard caps — a critically weak safety pillar, or a severe trading anomaly, caps the total regardless of the rest. Full methodology · About the Trust Index

Trust profile
Integrity5 screens run · 4 don't apply · 1 awaiting data
Market integrity
65Caution

Outcome can be influenced

Outcome controlStructural risk · high confidence

Settlement is decided by a token-holder vote.

Large tradesTrade signals · medium confidence

Largest single print on iran-agrees-to-surrender-enriched-uranium-stockpile-by-may-31-2026 carried 41% of its 150,039-contract tape (print is 124d old)

Screened clean
Participant influenceNo conflicted participant detected. Clear
Thin-volume movesNo significant move Clear
Size patternsTrade sizes look organic. Clear
1 screen not run
Thin-leg conviction · doesn't apply to this market type
Info fairness
80Good

Structural prior — no screens apply

No suspicious activity on any screen

4 screens not run
Move vs. catalyst · doesn't apply to this market type
Longshot repricing · doesn't apply to this market type
Pre-broadcast certainty · doesn't apply to this market type
Cross-venue timing · data source not connected
Resolution quality
60Caution

Settlement depends on token voting

No suspicious activity on any screen

Resolution rules read: Clear

Settlement is decided by a token-holder vote.

Liquidity
53Thin

Expect slippage beyond small size

2 contracts · worst first · 5 settled or closed — not scored

December 3131
Very thin · low confidence

Light recent trading — size may not fill near the screen price.

October 3177
Tradeable · low confidence

Light recent trading — size may not fill near the screen price.

Move quality
70Stable

No significant moves

2 contracts · worst first · 5 settled or closed — not scored

December 31—
No significant move (6h)

Price was stable over the last 6 hours.

October 31—
No significant move (6h)

Price was stable over the last 6 hours.

Rule clarity
100Clear

Counts toward Resolution quality, not here

2 contracts · worst first · 5 settled or closed — not scored

December 31100
Clear · high confidence

All checks pass

objective outcome · Clearofficial source · Cleartime boundary · Clear
October 31100
Clear · high confidence

All checks pass

objective outcome · Clearofficial source · Cleartime boundary · Clear
Trade quality
46High Risk

Order book is critically thin

Tradable, but expect execution cost beyond small sizes.

Outcome quality 58 (notional-weighted across 2 scored legs)

$100 order: 0.0c slippage (<1% of a 3c contract)

$1,000 order: book too thin to fill

$10,000 order: book too thin to fill

5 settled or closed — not scored

December 3131Market scoreLiquidity31Move quality–Rule clarity100
Why 31
Liquidity
31 · Very thin · low confidence

Light recent trading — size may not fill near the screen price.

Move quality
No significant move (6h)

Price was stable over the last 6 hours.

Rule clarity
100 · Clear · high confidence

All checks pass

objective outcome · Clearofficial source · Cleartime boundary · Clear
October 3177Market scoreLiquidity77Move quality–Rule clarity100
Why 77
Liquidity
77 · Tradeable · low confidence

Light recent trading — size may not fill near the screen price.

Move quality
No significant move (6h)

Price was stable over the last 6 hours.

Rule clarity
100 · Clear · high confidence

All checks pass

objective outcome · Clearofficial source · Cleartime boundary · Clear

underwriting_v1.4 · computed Oct 2, 2026

5. What are the primary preconditions set by the Trump administration and the Pezeshkian government for resuming nuclear negotiations?

Trump administration's key demandZero enrichment of uranium [1][2][3][4]
Pezeshkian government's key demandUS move military assets away from Iran [2][5]
Negotiation framework duration (June 2026)60 days [2][5][6]
The Trump administration set strict terms for nuclear negotiations. Its initial demands for nuclear negotiations with Iran included zero enrichment of uranium, strict limits on Iran's ballistic missile program, and an end to Iranian support for regional proxies [1][2][3][4]. The administration's historical stance also emphasized that political commitments from agreements like the Joint Comprehensive Plan of Action (JCPOA) framework are not legally binding and are subject to revocation [7][8][9][10].
The Pezeshkian government established its own demands for negotiations. Iran's demands for resuming nuclear negotiations required the United States to move military assets away from Iran, provide firm guarantees against future aggression, recognize Iran's legitimate rights (including enrichment as an NPT signatory), pay reparations, and lift economic sanctions [2][5].
A negotiation framework was established amid high diplomatic tension. A June 2026 Memorandum of Understanding (MoU) outlined a 60-day negotiation framework to address nuclear issues alongside other matters, such as the reopening of the Strait of Hormuz and sanctions relief [2][5][6]. However, as of September 2026, Iranian President Masoud Pezeshkian has publicly described Donald Trump as one of the world's plunderers, indicating high diplomatic tension rather than an active framework for nuclear negotiations [11].
Sources (11)
  1. 1Iran, US to hold nuclear talks on Friday as Trump warns...reuters.com
  2. 22025–2026 Iran–United States negotiationsen.wikipedia.org
  3. 3Iran Update, February 2, 2026understandingwar.org
  4. 4Trump's special envoy Witkoff to meet Iran's FM Araghchi...france24.com
  5. 5US-Iran ceasefire and nuclear talks in 2026 - Commons Librarycommonslibrary.parliament.uk
  6. 6Policy Alert: Urgent Questions for Congress on the Iran MOUfddaction.org
  7. 7Iran nuclear agreement: Joint Comprehensive Plan of Action - Ballotpediaballotpedia.org
  8. 8Iran nuclear agreement: Congressional review - Ballotpediaballotpedia.org
  9. 9Fact check: Can the United States change the Iran nuclear deal? - Ballotpediaballotpedia.org
  10. 10Iran nuclear agreement: Negotiations - Ballotpediaballotpedia.org
  11. 11Videonewsroom.ap.org

6. What does recent IAEA reporting and satellite intelligence indicate about the current status and accessibility of Iran's enriched uranium stockpile?

IAEA Access LackingNearly a year [1]
Enriched Uranium Levels20% and 60% U-235 [2]
Unverified Stockpile EstimateAs of June 13, 2025 [2]
Recent IAEA reports indicate minimal change in the status of Iran's enriched uranium stockpile, which remains largely unverified [1]. The IAEA has experienced a "loss of continuity of knowledge" over previously declared material due to a lack of access and verification for nearly a year, rendering it unable to account for Iran's enriched uranium stockpile for more than eight months [1]. The agency has repeatedly called for an explanation of the stockpile's fate [1].
Specific enriched uranium was noted at Esfahan, monitored indirectly. As of June 13, 2025, the IAEA estimated an enriched uranium stockpile that could not be fully verified [2]. The June 2026 safeguards report further noted that "20% and 60% U-235 was stored" at the Esfahan tunnel complex [2]. Given ongoing accessibility constraints, the IAEA relies on commercially available satellite imagery to monitor movements at key facilities. Open-source intelligence and satellite reporting indicate apparent movement consistent with uranium containers at the Esfahan tunnel complex, despite the absence of direct IAEA access [3]. This ongoing situation is recognized as a significant proliferation and compliance concern [1].
Sources (3)
  1. 1First IAEA report on Iran's nuclear programme since...reuters.com
  2. 2Analysis of IAEA Iran Verification and Monitoring and NPT...isis-online.org
  3. 3E3 statement to the IAEA Board of Governors, March 2026gov.uk

7. How does the Trump administration's current Iran policy framework differ from the diplomatic approach that produced the June 2026 'Islamabad memorandum'?

Islamabad Memorandum Signing DateJune 17, 2026 [1][2][3]
Negotiation Period Established by Memorandum60 days [1][2][3]
Status of Formal Talks (August 18, 2026)No formal talks underway or scheduled [4]
The Islamabad Memorandum established an interim diplomatic framework in June 2026. Signed on June 17, 2026, this agreement was designed to formalize a ceasefire, conclude the 2026 Iran war, and facilitate the reopening of the Strait of Hormuz [1][2][3]. Additionally, the memorandum established a 60-day period for subsequent negotiations to address outstanding issues, including Iran's nuclear program [1][2][3].
The Trump administration has since shifted away from this diplomatic opening. As of August 18, 2026, President Trump has stated that no formal talks are underway or scheduled with Iran, confirming that the naval blockade remains in effect and the previously agreed ceasefire is no longer operational [4]. This marks a return to a "maximum pressure" posture, involving new sanctions and threats of renewed military action [5][4][6]. This intensified approach followed the failure of subsequent negotiations to secure Iran's commitment to surrender its enriched uranium stockpile, a requirement that was not part of the original Islamabad Memorandum [5][4][6][7][8][9][10][11].
Sources (11)
  1. 1Assessing the Islamabad MOU and the U.S.-Iran Nuclear...armscontrol.org
  2. 2Islamabad Memorandum of Understanding Between the...presidency.ucsb.edu
  3. 3Islamabad Memorandumen.wikipedia.org
  4. 4August 18, 2026 - Trump says no talks underway with Iran...cnn.com
  5. 5Trump's Iran Negotiations: Less Art of the Deal, More...cfr.org
  6. 6Diplomacy During War: Priorities for the Trump Administrationwashingtoninstitute.org
  7. 7Iran agrees to surrender enriched uranium stockpile by...... 2026 | Polymarketpolymarket.copilot.markets
  8. 8Will Iran Surrender Its Enriched Uranium Stockpile by December 31? | Lines.comlines.com
  9. 9Iran agrees to surrender enriched uranium stockpile by end of 2026 | Manifoldmanifold.markets
  10. 10Iran agrees to surrender enriched uranium stockpile by...? Predictions & Live Odds | Bitget Walletweb3.bitget.com
  11. 11Iran agrees to surrender enriched uranium stock… 76% No · Polymarketexplorer.struct.to

8. According to IAEA precedents, what is the typical timeline and process required to verify the complete surrender of a nation's declared uranium stockpile?

Iran's enriched uranium (20%) stockpile184.1 kg (as of July 2026) [1]
Iran's enriched uranium (60%) stockpile440.9 kg (as of July 2026) [1]
Agreement to dispose of stockpileIran agreed "in principle" (as of September 1, 2026) [2][3]
The IAEA employs a rigorous process to verify uranium stockpile surrender. This process typically includes on-site inventory and the sealing of material. It also involves supervised downblending or the removal and export of the stockpile, alongside continuous monitoring to confirm that no undeclared material remains. Technical verification, such as accountancy reports and design information, is an integral part of this process, and challenge inspections can be conducted when required [4][5].
No official timeline exists for complete surrender verification by the IAEA. Iran has agreed "in principle" to a deal for disposing of its enriched uranium stockpile by September 1, 2026. However, a formal, fully executed, or IAEA-verified surrender of this material has not been completed [2][3]. The IAEA estimated Iran's stockpile in July 2026 to include approximately 184.1 kg of uranium enriched up to 20% and 440.9 kg enriched up to 60%. Iranian officials have stated that this material is located "under the rubble" of facilities damaged in June 2025 and that there is "no plan" to recover it [1].
Sources (5)
  1. 1Iran and Nuclear Weapons Productioncongress.gov
  2. 2Trump aims to end Iran war but nuclear issue remains...bbc.com
  3. 3Iran agrees in principle to dispose of enriched uranium, US officials saycryptobriefing.com
  4. 4The Surrender Problemrealcleardefense.com
  5. 5Iran nuclear dealen.wikipedia.org

9. What specific diplomatic initiatives have third-party mediators, such as Oman, proposed to bridge the gap between U.S. and Iranian positions in late 2026?

Date of Omani mediation focusSeptember 1, 2026 [1][2][3]
Expiration of broader US-Iran MoUAugust 16, 2026 [1][2][3][4]
Iran uranium stockpile surrender deadlineDecember 31, 2026 [5][6][7][8][9]
Oman continues mediating U.S.-Iran relations, focusing on the Strait of Hormuz. As of September 1, 2026, Oman has actively served as a third-party mediator, brokering diplomatic initiatives between the United States and Iran. These efforts have primarily concentrated on a phased reopening of the Strait of Hormuz, proposing specific measures such as establishing a temporary joint navigational corridor and a plan to clear sea mines [1][2][3]. These Omani-led negotiations form a critical "bilateral track" that has persisted even after a broader 60-day U.S.-Iran Memorandum of Understanding, which addressed nuclear issues like enriched uranium stockpiles, expired on August 16, 2026 [1][2][3][4].
Broader diplomatic efforts face significant hurdles due to mutual accusations. Diplomatic initiatives in late 2026 are significantly complicated by mutual accusations of violating the June 2026 interim agreement [4][10][11][12]. The U.S. continues to pursue a strategy of maximum economic pressure, while Iran demands sanctions relief and control over regional maritime routes [4][10][11][12]. The provided research findings do not detail other diplomatic initiatives from Oman or other mediators in late 2026 aimed at bridging wider gaps, such as those concerning nuclear matters or comprehensive sanctions relief.
Prospects for Iran surrendering enriched uranium remain low by year-end. Prediction markets indicate a low and declining probability that Iran will formally agree to surrender its enriched uranium stockpile by the December 31, 2026, resolution deadline [5][6][7][8][9]. Core disagreements between the parties persist on this issue, and no public agreement has been reached regarding its resolution [5][6][7][8][9].
Sources (12)
  1. 1Egypt says Iran, Oman diplomacy and US-Iran MoU...iranintl.com
  2. 2Tehran engages in renewed diplomatic push, touts...cbsnews.com
  3. 3Oman 2026: The Indispensable Mediator - CES Intelligenceces-intelligence.com
  4. 4Iran war is far from over as deadline for a deal passesapnews.com
  5. 5Iran agrees to surrender enriched uranium stockpile by...... 2026 | Polymarketpolymarket.com
  6. 6Iran agrees to surrender enriched uranium stock… 59% No · Polymarketexplorer.struct.to
  7. 7Will Iran Surrender Its Enriched Uranium Stockpile by December 31? | Lines.comlines.com
  8. 8Iran agrees to surrender enriched uranium stockpile by… Odds & Prediction Market Analysis | CryptoSlatecryptoslate.com
  9. 9Will Iran Surrender Enriched Uranium Stockpile?actionnetwork.com
  10. 102025–2026 Iran–United States negotiationsen.wikipedia.org
  11. 11Conflict With Iran | Global Conflict Trackercfr.org
  12. 122026 Iran war | Deal, Explained, United States, Israel, Strait...britannica.com

10. What Could Change the Odds

Key Catalysts

On June 17, 2026, the U.S. and Iran signed a 14-point framework memorandum of understanding (MOU) that commits both nations to negotiate the disposition of Iran's stockpile of enriched material [1][2][3][4]. The MOU specifies that the disposition will be achieved via a mutually agreed mechanism and schedule, with "down-blending on-site under the supervision of the IAEA" as the minimum methodology [1][2][3][4]. This framework initiated an initial 60-day negotiation period, extendable by mutual consent, without establishing a specific date for the surrender of the entire stockpile [2][3][4].
As of September 1, 2026, prediction markets show significant skepticism regarding the completion of a final nuclear deal within 2026, with traders assigning low probabilities [5][6]. There is no public record of Iran agreeing to surrender its enriched uranium stockpile, despite multiple rounds of U.S.-Iran diplomatic engagement following a June 2026 announcement by President Trump [7][8][9]. During negotiations, the U.S. has consistently demanded Iran dismantle nuclear facilities, abandon its enrichment program, and surrender its highly enriched uranium. Iran has rejected these demands, sometimes citing "acceptance of enrichment" as a goal [7][8]. As of April 2026, Iran was estimated to possess approximately 440.9 kilograms of highly enriched uranium (up to 60 percent) [10][11].

Key Dates & Catalysts

  • Closes: January 01, 2027
Sources (11)
  1. 1US and Iran sign initial deal to end war, ease sanctions and open Strait of Hormuz | AP Newsapnews.com
  2. 2Trump, Iran's President sign memorandum of understandingcnbc.com
  3. 3Read the full text of the 14-point US-Iran agreement as released by Tehran | Euronewseuronews.com
  4. 4Read the full 14-point US-Iran deal - AL-MONITOR: The Middle Eastʼs leading independent news source since 2012al-monitor.com
  5. 5Kalshi traders are not expecting a U.S. and Iran nuclear...cnbc.com
  6. 6US-Iran Final Nuclear Deal by December 31, 2026?tomorrowodds.com
  7. 7U.S.-Iran Ceasefire: Assessment, Reactions, and Issues for Congresscongress.gov
  8. 8U.S.-Iran Ceasefire and Negotiations: Assessment and Issues for Congresscongress.gov
  9. 9Possible U.S.-Iran Agreement: INARA and U.S. Sanctionscongress.gov
  10. 10https://www.congress.gov/119/crec/2026/04/13/172/64/modified/CREC-2026-04-13-pt1-PgS1706.htmcongress.gov
  11. 11Iran and Nuclear Weapons Production | Congress.gov | Library of Congresscongress.gov