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Will the US-Iran ceasefire hold through 12 October 2026?

Resolution: Updated:

In short

The market treats a breakdown of the ceasefire in the next few days as very unlikely. The window to settlement is short, only through 12 October 2026, and the resolution criteria require an actual US air or missile strike on Iran, not just rhetoric or a naval incident. That combination of a narrow time horizon and a high bar for

Editorial illustration for: Will the US-Iran ceasefire hold through 12 October 2026?

How the contract works

A contract on this market settles at $1 if the ceasefire breaks under the stated rules, and at nothing if it holds through 12 October 2026, Iran Standard Time. The rules are specific: only a US air strike, surface-to-surface missile strike, or one-way attack drone strike that directly hits Iran counts as a break. Naval gunfire, intercepted munitions, cyber operations, ground incursions, small arms fire, and even explicit threats or standing authorizations that are never executed do not trigger a No resolution. A price of 0.30, for example, would mean the market sees roughly three chances in ten that such a strike happens before the deadline. Positions can typically be sold before settlement at whatever price the market has moved to by then, so a holder is not locked in until 13 October 2026.
What the market thinks happens
$100
Yes94%

The event happens

Costs now
$0.94
If you put in $100
$106
No6%

The event does not happen

Costs now
$0.06
If you put in $100
$1,667

Probability

History starts collecting once the event is tracked

How the price has moved

Volume on this market has concentrated on Polymarket, with $851,613 traded and a consensus price of 94% at last read. The pricing suggests the market has treated a breakdown of the ceasefire as unlikely for some time, consistent with no major reported US strike on Iran since the truce took hold. Absent a specific reported trigger, a price sitting this high this close to the deadline reflects accumulated confidence that the remaining window will pass without a qualifying strike, rather than a sudden reaction to one day's news.

Analysis

Context

The ceasefire between the United States and Iran followed a period of direct military confrontation earlier in 2026, when US forces struck Iranian targets and Iran responded before both sides stepped back from further escalation. This market asks whether that truce survives a short additional window, through 12 October 2026. The question is narrow by design: it is not asking whether US-Iran tensions ease or whether talks progress, only whether the United States carries out another qualifying strike on Iranian territory before the deadline. The actors are straightforward. The US military and the White House decide whether to authorize action. Iran's government and its proxy network across the region are the other side of any potential flare-up. Reporting on strikes, including by wire services and defense-focused outlets, is what Polymarket uses to determine whether the ceasefire has broken. Naval skirmishes, cyber activity, or ground operations by either side do not count toward a No resolution, which keeps the bar for ceasefire failure specific and high. This kind of short-dated geopolitical market tends to track news flow closely. Absent a new triggering event, the default outcome is the ceasefire holding, since initiating a fresh strike carries its own political and military costs for Washington.
The consensus price of 94% across tracked venues reflects a market that views renewed US military action against Iran in the next few days as a low-probability event, not an impossible one. With total volume of $851,613 concentrated on Polymarket, pricing here is a reasonably clean read of how traders weigh the remaining window: a handful of days, under a tightly defined set of triggering actions. The resolution criteria matter as much as the news cycle itself. Because the rules exclude naval incidents, cyber operations, ground incursions, and even explicit threats or standing authorizations that are never carried out, the range of events that could flip this market to No is narrower than general headlines about US-Iran tensions might suggest. A diplomatic blow-up, harsh rhetoric from either capital, or a naval confrontation in the Gulf would not by itself move this to resolve No; only an actual air or missile strike directly hitting Iranian territory does that. The short remaining window โ€” settlement is pegged to 12 October 2026, 11:59 PM Iran Standard Time, with resolution following shortly after on 13 October โ€” also shapes the price. Short-dated geopolitical contracts tend to sit close to their terminal value once no new triggering event has emerged, because there is limited time left for the underlying situation to change materially. A price sitting at 94% with the deadline just days away is consistent with a market that sees the ceasefire as the default state absent a specific new provocation. History in this region offers a caution against complacency: ceasefires between the US and Iran, and between Iran and other regional actors, have broken on short notice before, often following a single incident rather than a gradual buildup. That tail risk is part of what keeps the price below full certainty even this close to the deadline, rather than resolving effectively to 100%.

What moves the probability

  1. Narrow resolution window

    The ceasefire only needs to hold a few more days, through 12 October 2026, which limits the time available for a new triggering event to emerge. Short windows generally push prices toward their terminal value absent new news, which supports a high Yes price here.

  2. High bar for a qualifying strike

    Only a direct US air strike, surface-to-surface missile strike, or one-way drone strike against Iranian territory counts as a ceasefire break. Naval incidents, cyber operations, and rhetoric are excluded, which narrows the set of events that could move this market to No.

  3. Regional proxy activity

    Iran-aligned groups across the region remain active, and any escalation involving them could pressure Washington toward a response. This is a background risk that keeps the price below full certainty even without a specific reported incident.

  4. Political cost of renewed strikes

    Launching a new strike on Iran carries diplomatic and domestic political costs for the US administration, which lowers the likelihood of unprovoked escalation in a short window. This factor supports the ceasefire holding absent a clear provocation.

The case for

  • The ceasefire has held since military action between the US and Iran paused earlier in 2026, and no qualifying strike has been reported since.
  • The resolution window is short, closing on 12 October 2026, which leaves limited time for a new strike to be launched and reported.
  • The resolution criteria exclude naval incidents, cyber operations, and rhetoric, narrowing the paths to a No outcome to an actual air or missile strike.
  • Renewed US strikes carry political and diplomatic costs that make unprovoked escalation less likely absent a specific trigger.

The case against

  • Ceasefires in this region have broken on short notice before, often following a single incident rather than a visible buildup.
  • Proxy activity by Iran-aligned groups could prompt a US response that would qualify as a strike under the resolution rules.
  • A new intelligence assessment or incident in the final days before the deadline could change US calculations quickly.
  • The market price, while high, is not certainty, and the small remaining probability reflects genuine residual risk rather than noise.

What to watch

The key date is 12 October 2026, 11:59 PM Iran Standard Time, the cutoff for any qualifying US strike to count toward a No resolution; the market resolves shortly after, on 13 October 2026. Between now and then, the things that would actually move this price are concrete: a reported US air strike, surface-to-surface missile strike, or one-way drone strike hitting Iranian territory. Naval incidents in the Gulf, cyber operations, Iranian proxy activity, or statements from US officials about possible future action would be relevant context but do not themselves satisfy the resolution criteria. Wire service reporting confirming or ruling out a strike in the final 48 hours before the deadline is the most likely source of any late price movement.

Trade this contract

Venues (1)

Open on PolymarketYes 0.94
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More about this event

Venues (1)

Resolution rules

Determined by
Polymarket; based on reporting of US military action against Iran
Resolution date

This market resolves based on Polymarket's determination, drawing on reporting of US military action against Iran. It resolves No only if the United States conducts a qualifying strike โ€” an air strike, a surface-to-surface missile strike, or a one-way attack drone strike โ€” that directly impacts Iranian territory by 12 October 2026, 11:59 PM Iran Standard Time. Intercepted munitions, naval gunfire, cyber operations, ground incursions, small arms fire, and threats or authorizations that are never executed are explicitly excluded and do not count toward a No. If no such strike is reported by the deadline, the market resolves Yes.

Calculation methodology โ†’

Local context

A renewed US strike on Iran would likely move oil prices quickly, given Iran's position on regional energy routes including the Strait of Hormuz, which matters directly for fuel costs and inflation readings in the US, UK, and other importing economies. It would also feed directly into the US domestic political debate over military authorization and foreign policy, a live issue for this audience regardless of location. For readers in India, which imports a significant share of its oil, and for European economies still sensitive to energy price shocks, the connection runs through global crude benchmarks rather than any direct security exposure.

Common questions

What exactly needs to happen for this market to resolve No?
The United States must conduct a qualifying strike โ€” an air strike, a surface-to-surface missile strike, or a one-way attack drone strike โ€” that directly hits Iranian territory before 12 October 2026, 11:59 PM Iran Standard Time. Naval gunfire, intercepted munitions, cyber operations, ground incursions, small arms fire, and threats or authorizations that are never carried out do not count.
When does this market settle and on what date?
The deadline for a qualifying strike is 12 October 2026, 11:59 PM Iran Standard Time. The market resolves based on reporting as of that cutoff, with final settlement following on 13 October 2026.
What does a price of 94% actually mean?
It means traders collectively price the chance of the ceasefire holding through the deadline at around 94%, based on current trading. It is the market's estimate, not a guarantee, and it can shift if new reporting emerges.
What happens if a strike is reported but disputed or unconfirmed?
Resolution depends on credible reporting of a qualifying strike; ambiguous or unconfirmed incidents would likely delay a definitive call until clearer reporting emerges. The rules are written narrowly specifically to reduce this kind of ambiguity.
Why does a naval incident or cyber attack not count toward ending the ceasefire?
The resolution rules were written to isolate a specific, verifiable type of escalation โ€” direct air or missile strikes on Iranian territory โ€” rather than the broader category of US-Iran friction. This keeps the market tied to a concrete, reportable event rather than general tension.
Could this market affect oil prices or broader markets?
A reported US strike on Iran would likely move oil prices and risk assets given Iran's role in regional energy routes, which is part of why this narrow military question draws attention beyond specialist audiences. The market price here is one real-time gauge of how traders weigh that risk.

Related events

94%/ 6%
Yes / No
Open on Polymarket