Ceasefire markets: read the Iran contract beyond its title

A dated US-Iran ceasefire rule snapshot shows which strikes qualify, which do not, and how the 3-calendar-day conflict window works.

In this guide

Start with the settlement clause, not the headline

The rule snapshot retrieved on 10 October 2026 describes an example submarket, “US x Iran ceasefire continues through September 20?”. Its settlement line is blunt: resolve “No” if the United States takes a qualifying military action against Iran by the specified date, 11:59 PM Iran Standard Time. Otherwise resolve “Yes.” The title says ceasefire, but the decision rule is bounded by actor, weapon type, impact geography and deadline. Those 4 filters decide more than the word ceasefire does.

A qualifying action means an air strike or a surface-to-surface missile strike initiated by the United States that directly impacts Iran. Air strikes include bombs, air-to-surface missiles and air-launched drones. Surface-to-surface missile strikes include one-way attack drones and surface-to-surface missiles such as cruise or ballistic missiles. If the United States is not the initiating actor, or a munition is intercepted before impact, the clause does not fire. These conditional examples are illustrative only; they do not describe real actions.

Put 2 hypotheticals side by side. A U.S. munition intercepted before impact does not qualify. A U.S. air strike that impacts the included territory within the deadline and is evidenced does qualify. Same actor, opposite outcomes, because impact and weapon category are separate tests. The snapshot also lists exclusions: surface-to-air missile strikes, small-arms fire, ground incursions, cyber operations, naval gunfire and artillery, howitzers, mortars, rocket artillery such as MLRS systems, minor surface-to-surface strikes including short-range loitering munitions, FPV drones and ATGM strikes, and any threat, authorization or announcement of force not executed.

Territory and time do the quiet work

“Iran” means the terrestrial territory of Iran, including internal waters. Iran’s maritime territory and airspace are not encompassed; an interception or strike that occurs outside that boundary does not enter the qualifying set on the stated geography. Where borders are disputed, the snapshot includes all territory claimed by and under the de facto control of Iran as of market creation. So an object falling in internal waters can matter while an event over maritime territory may not. The boundary is part of the contract, not background color.

Debris requires its own check. Any munition intercepted or destroyed before impact does not constitute a qualifying military action. Debris, fragments or wreckage from intercepted munitions that land on Iran do not qualify regardless of damage incurred. That separates the physical event of damage from the contractual event of a munition impacting. A reader comparing reports should ask which of the 2 the report actually describes.

When reports conflict: the 3-calendar-day process

Occurrence, attribution and timing are primarily determined by a consensus of information available from the resolution sources. Where multiple sources conflict over occurrence, attribution or timing, the market remains open until the earlier of 2 events: confirmation of occurrence, attribution and timing based on consensus, or 3 full calendar days (Iran Standard Time) from the date of the first credibly reported evidence of the action. If that period would extend past the end date, the market remains open to allow 3 full calendar days to pass.

At the end of the third calendar day, if conflicting reports remain, the incident is adjudicated on the totality of information available from the resolution sources at that time. No single statement, denial or presentation of evidence governs where the totality contradicts it. The resolution sources are official information from the governments and militaries of the United States and Iran and a consensus of credible reporting. This is the contract’s own conflict procedure, not a settlement shortcut for one dramatic headline.

That extended process matters for anyone tracking the contract. A ceasefire continues until a qualifying action is established; an unresolved allegation does not immediately flip the outcome. But the window also gives the resolver time to gather evidence after a report first credibly surfaces. Read timing as a sequence: first credible report, then up to 3 full calendar days, then adjudication on the totality of the record.

Resolution mechanics beyond this example

The contract’s own rules specify the source, deadline and exceptional cases. Check those clauses for the question being examined, since a title alone cannot determine settlement.

For broader context on political and geopolitical market structures, see this guide to geopolitical markets. For how ordinary market resolution works across sources, this resolution explainer sets out the source and deadline logic. A market journal is useful for documenting dated rule snapshots like the one used here, including the exact retrieval date and source hash. Each of these routes points back to the contract text rather than to a headline.

What the title cannot tell you

A ceasefire title does not imply every possible hostile act counts. The snapshot draws explicit lines around weapon type, impact location and initiation by the United States. A cyber operation, a threat of force not executed or a surface-to-air missile strike sits outside the qualifying set even if news coverage calls it an attack. Conversely, a single qualifying air strike that directly impacts the included territory before 11:59 PM Iran Standard Time pushes toward a No resolution. The contract is exact about the actions that break it.

This is not a legal opinion, a live recommendation or a statement of current diplomatic status. The snapshot is a dated historical example retrieved on 10 October 2026, and some dates in it are past. Do not treat the example submarket or its deadline as currently tradable. The correct next step is to locate the actual live rule text, check the stated sources and deadline, then read the current event against these filters before acting. Conflicting reports still enter the contract’s own 3-day process rather than deciding the outcome on the first headline.

Sources & verification

Polymarket: Resolution ↗

Sources checked

PolyZeno. Automated review with DeepSeek V4.1 Flash.