How the contract works
A contract on this question settles at $1 if the ceasefire fails to hold โ meaning the United States conducts a qualifying strike on Iran before the deadline โ and at nothing if it holds through settlement. The price at any moment reflects what buyers and sellers currently think the chance of that outcome is; a contract priced at 0.30, for example, would imply the market sees roughly a three-in-ten chance of a qualifying US strike, not that the price is right or wrong. Settlement is tied to a specific cutoff: 11:59 PM Iran Standard Time on 25 September 2026, based on news reports of US military action meeting the stated definition. Anyone holding a position does not have to wait for that deadline; positions can typically be sold on the open market at whatever price is current before settlement.
Yes97%
No3%
Probability
How the price has moved
The market consensus stands at 96% across tracked venues, with all reported volume of $575,367 on a single venue, Polymarket. No separate historical move data โ opening level, prior-day change, or multi-venue spread โ is available for this market beyond the current single-venue reading, since Polymarket is the only venue currently trading it. A high, singly-sourced reading like this close to the settlement date typically reflects a market that views the outcome as largely settled by the absence of any disqualifying event so far, rather than one shaped by a specific news trigger; there is no publicly reported catalyst behind the current level beyond the calendar itself running down.
Analysis
Context
This market tracks the fate of the ceasefire that has governed US-Iran relations since the June 2025 conflict, when Israel and Iran fought a twelve-day war that included US strikes on Iranian nuclear facilities before a truce was brokered. Since then, the ceasefire has periodically come under strain from regional flashpoints involving Israel, Gulf shipping, and Iran's nuclear program, but no confirmed US strike on Iranian territory has followed. The question narrows that broader story to a single, testable fact: does the United States conduct a qualifying military strike on Iran before the market closes.
The resolution criteria are unusually specific. They count air strikes, air-to-surface missiles, air-launched drones, and surface-to-surface missile or one-way attack drone strikes as disqualifying events. They explicitly exclude intercepted or destroyed munitions, naval gunfire, artillery, cyber operations, small-arms fire, ground incursions, and mere threats or authorizations. That distinction matters because it filters out a great deal of the friction that periodically appears in Gulf and regional reporting without counting it against the ceasefire.
With settlement due at the end of 25 September 2026 Iran Standard Time, the window remaining is now measured in hours rather than weeks.
The consensus across tracked venues sits at 96%, with all of that volume โ $575,367 โ concentrated on a single venue, Polymarket. A reading this close to certainty on a geopolitical question usually means one of two things: either the underlying event has effectively already been decided by the calendar, or there is genuinely no visible pressure building toward the disqualifying outcome. Here it is largely the former. With settlement due within roughly a day of this snapshot, the market is not really pricing the ceasefire's durability over months โ it is pricing the odds that a qualifying US strike lands in the next 24 hours, a much narrower and more tractable question.
The resolution language does a lot of the work in keeping that number high. Naval gunfire, cyber operations, small-arms exchanges, ground incursions, and even a US authorization to strike would all leave the market unaffected under these rules; only an actual air or missile strike counts. Given how much of the recent friction between the US, Iran, and Israel has taken forms that fall outside that narrow definition โ interceptions, cyber activity, proxy skirmishes โ the bar for a No outcome is higher than casual headlines might suggest.
Single-venue concentration is also informative. With no second venue to arbitrage against, the market lacks the cross-venue spread that often signals disagreement about how to interpret ambiguous news. A high, unchallenged consensus number in a market like this typically reflects genuine agreement rather than one side simply not having capital deployed against the other. The $575,367 in volume, while not large in absolute terms for a geopolitical market, is enough to indicate active price discovery rather than a stale, unwatched listing.
The key historical anchor is the June 2025 war itself. That conflict showed the US is willing to strike Iranian nuclear infrastructure directly when it judges the threat serious enough, which is precisely why this market exists rather than being dismissed outright. But it also showed that once a ceasefire is declared, it has proven durable through more than a year of subsequent tension, surviving multiple lower-level incidents without escalating back to direct US strikes.
What moves the probability
Narrow settlement window
With roughly a day left before the 25 September 2026 deadline, there is very little time left for circumstances to change. Short windows compress geopolitical risk into a near-binary read of the immediate news cycle rather than an assessment of months of instability.
Precise disqualifying definition
Only actual air or missile strikes on Iran count against the ceasefire; naval gunfire, cyber operations, small-arms fire, ground incursions, and mere threats do not. This narrows the plausible paths to a No outcome and keeps the probability of Yes high even amid regional friction.
No confirmed strike reported as of 24 September 2026
The absence of any reported qualifying US military action against Iran heading into the final day is the single strongest signal behind the high consensus. Markets price recent silence heavily when the remaining window is this short.
Precedent since June 2025
The ceasefire following the twelve-day Israel-Iran war, which included US strikes on Iranian nuclear sites, has held for well over a year through multiple periods of regional tension. Each additional month without a qualifying US strike adds to the market's confidence that the pattern continues.
Single-venue concentration
All tracked volume, $575,367, sits on one venue, Polymarket, meaning there is no cross-venue spread to signal disagreement. A unified, high consensus in this setup usually reflects genuine market agreement rather than untested pricing.
The case for
- No US strike on Iran meeting the stated definition has been reported as of 24 September 2026.
- The ceasefire established after the June 2025 conflict has held for more than a year despite periodic regional friction.
- The settlement window closes within roughly a day, leaving little time for a qualifying strike to occur and be confirmed.
- Actions that have periodically raised tension in the region โ naval incidents, cyber activity, and rhetorical threats โ are explicitly excluded from counting against the ceasefire.
The case against
- Middle East tensions involving Israel and Iran remain volatile, and a fast-moving crisis could still produce a US strike within the remaining window.
- Iran's nuclear program remains a stated US redline, and any perceived violation could prompt swift military action before the deadline.
- A single confirmed air or missile strike, even a limited one, would be sufficient to resolve the market No regardless of how brief the remaining time is.
- Geopolitical shocks by nature do not always announce themselves in advance, so the short time remaining does not eliminate the possibility entirely.
What to watch
The only date that matters here is the settlement cutoff: 11:59 PM Iran Standard Time on 25 September 2026. Between now and then, the relevant developments to track are any news reports of a US air strike, air-to-surface missile strike, air-launched drone strike, or a surface-to-surface missile or one-way attack drone strike against Iranian territory. Statements from the Pentagon or the White House about military posture in the region, alongside any Israeli-Iranian flare-up that could draw in US forces, are the most likely sources of a sudden shift, though under these resolution rules only an actual strike โ not an authorization or threat โ would change the outcome.
Trade this contract
Open on Polymarket
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