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Will Iran agree to surrender its enriched uranium stockpile by 31 December 2026?
chance the market gives this event โ not your chance of being right
- Yes โ The event happens
- 13%
- No โ The event does not happen
- 87%
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In short
The market treats this as unlikely. Iranian officials have repeatedly and publicly rejected surrendering enriched material as a sovereignty red line, and Tehran's suspension of cooperation with the International Atomic Energy Agency points away from a transfer deal, not toward one. A change would require either a formal US-Iran or Israel-Iran agreement naming the stockpile specifically, or a fresh round of pressure severe enough to force Iran's hand before 31 December 2026.
How the contract works
A contract on this market settles at $1 if Iran publicly agrees, unilaterally or through a deal with the US or Israel, to place any part of its enriched uranium stockpile under outside custody by 31 December 2026, 11:59 PM ET. It settles at nothing if no such agreement is made public by that date. An agreement made as a precondition to a broader peace process still counts even if that broader process is never completed, but an agreement only to cap or limit future enrichment levels does not qualify. The market price at any moment reflects what buyers and sellers currently think the chance of that agreement is; a contract priced at 0.30, for example, would imply traders see roughly a three-in-ten chance, not a guarantee either way. Positions can typically be sold before 31 December 2026 at whatever price the market has moved to by then, rather than held to settlement.
Yes13%
No87%
Probability
How the price has moved
The market opened on 29 July 2026 at 100 percent, an opening print more consistent with thin initial trading than considered pricing, moved within a stated range of 87 to 100 percent, and then dropped sharply to a consensus of 13 percent, where it has stayed flat over the most recent 24 hours. That pattern reads as an initial mispricing being corrected once traders worked through the resolution language, particularly the rule that enrichment-cap agreements do not count, followed by a period of stability once the market settled near its current level. The flat 24-hour reading indicates no fresh public development has moved the price since the correction; the move follows no single publicly reported trigger beyond the market's own recalibration.
Context
This market sits downstream of the June 2025 strikes by Israel and the United States on Iranian nuclear sites, including Fordow, Natanz and Isfahan, which were aimed at degrading Iran's enrichment capacity. In the aftermath, Iran's parliament moved to suspend cooperation with the IAEA, and the whereabouts and condition of Iran's stockpile of uranium enriched to roughly 60 percent purity became a matter of open dispute between Tehran, Washington and the agency. That dispute is the direct backdrop to this question: the market is not asking whether Iran's enrichment capacity was damaged, but whether Iran will publicly agree to hand physical custody of what remains to an outside party.
The resolution criteria are specific. A public agreement to transfer, ship, or place any portion of the stockpile under outside custody counts, even as a precondition to a wider deal that never gets finalized. A separate agreement merely to cap or limit future enrichment levels does not count, no matter how significant that would be diplomatically. This distinction matters because past Iran nuclear diplomacy, including the 2015 deal and earlier proposals, has repeatedly produced enrichment caps and inspection regimes without full removal of existing material from Iranian soil.
Analysis
The consensus figure across venues is 13 percent, drawn from Polymarket, the only venue currently trading this contract, with $2,026,480 in volume behind it. That volume is not trivial for a single-outcome geopolitical market and suggests active positioning rather than a market nobody is watching. What stands out more than the level is the trajectory: the market was first recorded on 29 July 2026 at 100 percent, moved within a stated range of 87 to 100 percent, and has since settled near 13 percent, with zero change in the most recent 24 hours. A jump from effective certainty to roughly one-in-eight within the market's first day of recorded trading is a strong signal that the initial print reflected either an illiquid opening quote or a mispricing that was corrected once traders worked through the actual resolution language, particularly the exclusion of enrichment-cap deals.
The flat 24-hour reading at the lower level is itself informative. It means that after the initial correction, the market has not found new public information to move on since, which is consistent with a diplomatic track that is currently quiet rather than one producing daily headlines. Iran's public position has been to treat the stockpile as a sovereign asset and a card to be played, not surrendered outright, and the suspension of IAEA cooperation removes one of the normal channels through which a transfer would even be verified. For the market to move meaningfully, there would need to be either a concrete negotiating session with the US or Israel that names the stockpile specifically, or a shift in Iranian domestic politics significant enough to be reported by Iranian state media or Western officials directly. Absent that, a market pricing this as a low-probability outcome with five months of trading still ahead is behaving as expected for a question that requires a specific, verifiable, publicly stated concession rather than a general improvement in relations.
What moves the probability
Post-strike stockpile status
Uncertainty over how much of Iran's pre-strike enriched material survived the June 2025 strikes on Fordow, Natanz and Isfahan affects both sides' incentive to negotiate a transfer. If little recoverable material remains, a surrender agreement becomes less urgent for outside powers and less costly for Iran to concede, which could push the probability up if raised publicly.
IAEA cooperation suspension
Iran's parliamentary move to suspend cooperation with the IAEA removes the normal verification channel a transfer deal would rely on. This pushes the probability down, since a resumption of inspection access would typically need to precede or accompany any custody transfer.
Iranian domestic political stance
Iranian officials have consistently and publicly described the stockpile as non-negotiable, framing surrender as a sovereignty concession rather than a technical one. This is the single largest downward pressure on the price, since the resolution requires a public statement, not a private shift.
US and Israeli diplomatic posture
Any US-Iran or Israel-Iran talks that explicitly raise stockpile custody, rather than only enrichment caps or sanctions relief, would be the most direct upward driver, since the market excludes cap-only agreements by design.
Sanctions and economic pressure
Continued or escalating US sanctions pressure could eventually push Iran toward concessions it currently rules out, but this operates on a slower timeline than the 31 December 2026 deadline allows for with confidence.
The case for
- Renewed Israeli or US strikes, or the credible threat of them, could raise the cost of holding the stockpile enough that Iran offers a transfer as a precondition to de-escalation.
- A revived negotiating track modeled on earlier proposals to relocate low-enriched material abroad could produce a preliminary agreement that counts under the rules even if never fully implemented.
- Severe additional economic pressure from sanctions could shift Iranian calculations before the 31 December 2026 deadline, particularly if paired with sanctions relief offers tied specifically to custody transfer.
- Any public statement by a senior Iranian official agreeing to place even a portion of the stockpile under outside control would trigger resolution regardless of whether a broader deal follows.
The case against
- Iranian officials have repeatedly and publicly stated that surrendering enriched uranium is a sovereignty red line, and that position has not shifted since the June 2025 strikes.
- Iran's suspension of IAEA cooperation moves in the opposite direction from the transparency a custody transfer would require, making verification harder rather than easier.
- The market's own trading history, a collapse from a 100 percent opening print to 13 percent within its first day, suggests the early pricing was not a considered signal but the current 13 percent reflects settled trader judgment.
- A deal limited to capping or reducing future enrichment levels, which is the more commonly discussed diplomatic outcome, does not qualify under the resolution rules and would leave this market at No.
Trade this contract
Open on Polymarket
- gas covered
- no trading fee
Venues (1)
- PolymarketRecommendedYes13%0.13
- Volume (24h)
- US$2.4k
- Fee
- 0%
Probability
- Iran agrees to surrender enriched uranium stockpile by December 31, 2026?13%
- Iran agrees to surrender enriched uranium stockpile by August 31, 2026?3%
- Iran agrees to surrender enriched uranium stockpile by July 31, 2026?0%
Resolution rules
This page tracks the Polymarket market 'Iran agrees to surrender enriched uranium stockpile by December 31, 2026?'. It resolves Yes if Iran publicly agrees, either on its own or as part of a deal with the US or Israel, to transfer, ship, or place any portion of its enriched uranium stockpile under the custody or control of an entity outside Iran, excluding non-state armed groups aligned with Iran, by 31 December 2026, 11:59 PM ET. An agreement reached as a precondition to a wider peace process counts even if that process is never completed. Agreements limited to capping or reducing enrichment levels do not qualify. Only one venue, Polymarket, currently trades this contract, so there is no cross-venue spread to reconcile.
Calculation methodology โLocal context
This question sits at the center of US foreign policy toward Iran, a subject that shapes sanctions enforcement, oil market expectations and broader Middle East security calculations that Washington, London, Ottawa and Canberra all factor into their own diplomatic and defense planning. A confirmed transfer agreement would likely ease tensions that have periodically pushed crude oil prices higher, which flows through to fuel prices in the US, UK, Canada and Australia. Conversely, continued deadlock or renewed strikes tied to the stockpile dispute would keep that geopolitical risk premium in play for energy markets and for US-led sanctions policy more broadly.
What to watch
Watch for any announced US-Iran or Israel-Iran negotiating sessions that name the enriched uranium stockpile specifically, rather than only enrichment caps or sanctions relief. Watch IAEA Board of Governors meetings and any statements on Iran's cooperation status, since a resumption of inspection access would be a plausible precursor to a custody discussion. Watch statements from Iran's Supreme Leader, Foreign Ministry or nuclear negotiators, since a public statement alone can trigger resolution. Watch for renewed military action by Israel or the US, which could either force a concession or harden Iran's position further, and watch the calendar running to 31 December 2026, 11:59 PM ET, the final resolution deadline.
Common questions
- What exactly settles this market, and when
- The Polymarket market resolves based on public statements by Iranian officials or a formal international agreement showing Iran has agreed to transfer, ship or place any part of its enriched uranium stockpile under outside custody. The deadline is 31 December 2026, 11:59 PM ET; if no qualifying public agreement exists by then, the market resolves No.
- What does the market price actually represent
- The price is what buyers and sellers currently agree the probability is, not a forecast from any single analyst or institution. It moves as new information arrives and can be read as an implied percentage chance of the specific outcome defined in the resolution rules, not of Iran-US relations improving in general.
- Does a deal only capping future enrichment count
- No. The resolution rules explicitly exclude agreements that merely limit or cap enrichment levels. Only an agreement to transfer, ship or place existing enriched material under outside custody qualifies, which is a narrower and more specific outcome.
- What if Iran agrees in principle but the deal is never finalized
- It can still resolve Yes. The rules state that an agreement made as a precondition to a broader peace process counts even if that broader process is not finalized, so a preliminary public commitment is sufficient on its own.
- Why did the price fall so sharply right after the market opened
- The market opened at 100 percent on 29 July 2026, which is more consistent with an illiquid first print than a considered estimate. The subsequent drop to 13 percent, followed by a flat 24-hour period, suggests traders corrected the price once they had worked through the specific exclusions in the resolution language.
- Could Israeli or US military action affect this outcome
- Yes, in either direction. Further strikes could pressure Iran into offering a transfer as a de-escalation step, or could harden Iran's public position further, since the market only resolves on an actual public agreement, not on military outcomes alone.
Related events
13%
Yes / No