In brief
Polymarket's prediction market on a US-Iran effective ceasefire (14-day pause) currently favors an outcome by August 31, with a 71.5% implied probability. The market also shows probabilities for August 14 (63.5%) and July 31 (51.0%), but the July 31 date has already passed. No external sources are available to confirm recent developments, so this analysis is based solely on market data and carries low confidence.
Introduction
As of August 2, 2026, the Polymarket event "US x Iran Effective Ceasefire by...? (2 week pause)" offers a unique window into market expectations for a halt in US military strikes against Iran. The market defines a qualifying ceasefire as a continuous 14-day period without US air or surface-to-surface missile strikes impacting Iranian territory. With three possible end dates—July 31, August 14, and August 31—the probabilities reflect shifting sentiment. However, the absence of external news sources means we cannot verify the current state of hostilities or diplomatic efforts.
What to know
The market resolves to "Yes" if a 14-day period without qualifying US military actions against Iran is completed by the specified end date. Qualifying actions include air strikes and surface-to-surface missile strikes that directly impact Iran's terrestrial territory. Excluded actions are interceptions, cyber operations, ground incursions, and minor strikes. The resolution relies on official US and Iranian government information and credible reporting. As of the analysis date, the market has a total volume of over $10.6 million and liquidity of $275,313. Source: Polymarket event page
The market numbers
| Outcome | Implied Probability |
|---|---|
| August 31 | 71.5% |
| August 14 | 63.5% |
| July 31 | 51.0% |
Note: These are separate binary markets for each end date. The July 31 outcome has already passed; its probability may reflect pre-resolution pricing.
The factors at play
- Market momentum: August 31 has the highest probability, suggesting traders expect a ceasefire later in the month.
- Time decay: As each date passes without a ceasefire, its probability drops to zero. July 31 is already in the past.
- Lack of external verification: Without news sources, we cannot assess diplomatic talks, military operations, or political statements that would influence the market.
- Liquidity and volume: The market is relatively liquid, but the absence of recent credible reports increases uncertainty.
Our prediction
According to our analysis, the most likely outcome is August 31. Polymarket currently assigns a probability of 71.5%, while our internal estimate is 70%. The difference stems from the fact that we have no external sources to confirm or challenge the market's assessment; we therefore align closely with the market but note that the July 31 outcome is already resolved (likely to "No"), which may skew the remaining probabilities. Our confidence is low due to the complete lack of independent news.
Risks and uncertainties
- No external sources: The analysis relies entirely on market data, which may be outdated or mispriced.
- Sudden escalation: A new US military strike could reset the 14-day clock, making a ceasefire by August 31 less likely.
- Diplomatic breakthrough: Unexpected negotiations could lead to a ceasefire earlier than August 31, benefiting the August 14 outcome.
- Resolution ambiguity: Disputes over what constitutes a qualifying military action could delay resolution.
Conclusion
The Polymarket market for a US-Iran ceasefire points to August 31 as the most probable date for a 14-day pause. However, the lack of external news sources means this conclusion is highly uncertain. Traders and observers should seek independent verification of current events before making decisions.
This content is for informational purposes only and does not constitute financial, political or investment advice, betting advice, or any operational recommendation.