Polymarket keeps Aug. 31 US–Iran ceasefire odds at 51.5% after 7 nights

Editor
5 Min Read




Ted Hisokawa
Jul 18, 2026 00:15

Fresh live updates report the US and Iran traded attacks for a seventh straight night, underscoring an unresolved conflict. Polymarket traders care because the ceasefire ladder still puts the Aug.





Polymarket keeps Aug. 31 US–Iran ceasefire odds at 51.5% after 7 nights

Seventh Night of US–Iran Exchanges Keeps Polymarket Ceasefire Ladder Low Near-Term, Near-Coinflip by Aug. 31

Polymarket traders are pricing a 51.5% chance that a US–Iran “effective ceasefire” is in place by the August 31 rung, on $615,750 in matched volume. The latest catalyst is fresh reporting that the two sides have exchanged attacks for a seventh consecutive night, and the ladder pricing shows where traders draw the line between “soon” and “by late August.”

Key Takeaways

  • Polymarket’s leading rung is “by August 31” at 51.5% Yes (48.5% No).
  • After news of a seventh straight night of exchanges, the curve still prices low near-term ceasefire odds while keeping a near-coinflip by Aug. 31.
  • The market is active and resolves by 2026-08-31 23:59 UTC; the past 24h shows -2.0pp with a reversal flagged.

A live update report says the US and Iran have exchanged attacks for a seventh consecutive night, extending the current run of hostilities. The item frames the situation as ongoing and unresolved in the near term.

Odds Ladder & Liquidity Check: $615,750 Matched as July 18 at 2% Yes vs Aug. 31 at 51.5% Yes (-2.0pp, reversal_detected)

This is a price-ladder market: each date is its own Yes/No contract on whether an “effective ceasefire” is achieved by that deadline, not a single bet on which date will happen. The curve is steep at the front end—July 18 is 2.0% Yes / 98.0% No and July 24 is 14.5% Yes / 85.5% No—while later rungs move toward a coin flip, with August 14 at 32.5% Yes / 67.5% No and August 31 leading at 51.5% Yes / 48.5% No. Despite $615,750 in volume, the headline rung is flat on the snapshot (51.5% vs 51.5%), and the 24h/7d read is slightly lower at -2.0pp with “reversal_detected: true,” suggesting recent two-way repricing rather than a one-direction drift. The historical summary also shows the latest odds (51.5%) sitting below the average of the last five points (55.9), consistent with a modest pullback even as consensus is tagged “stable,” which fits a market that agrees on “not imminently” but is split on “by late August.”

Watch whether pricing compresses between the August 14 (32.5% Yes) and August 31 (51.5% Yes) rungs—tightening would imply traders are shifting probability mass toward a narrower timeline. Also watch for changes in the 24h change metric and whether the “reversal_detected” flag persists as new information arrives before the 2026-08-31 23:59 UTC resolution deadline.

Beyond the ceasefire ladder, traders often scan adjacent Polymarket contracts that reprice the same risk from different angles and timelines. Big-volume sentiment is concentrated in 71.5% on “Will the U.S. invade Iran before 2027?” ($44,192,504) and 89.5% on “Will the Iranian regime fall before 2027?” ($22,319,841), while the near-term shipping channel is heavily skewed with 98.75% on “Strait of Hormuz traffic returns to normal by July 31?” ($17,595,438). Longer-horizon political continuity also has a clear favorite at 77.35% for “Iran leader end of 2026?” ($30,410,638), giving traders multiple ways to hedge or express views as headlines hit.

Odds Trend

Window Change (pp)
24h -2.0
7d -2.0

Implied odds (last 48h)2550Odds %August 31August 14July 31July 24

By the Numbers

  • Platform: Polymarket
  • Market: US x Iran Effective Ceasefire by…? (2 week pause)
  • Contract type: Price strike ladder: each rung has separate Yes/No; Yes means the spot price is above that USD strike at settlement.
  • Resolution window: Aug 31, 2026 (UTC)
  • Status: Active (open for trading)
  • Volume: ~$615,750

Top strike rungs

Strike Yes No
August 31 51.5% 48.5%
August 14 32.5% 67.5%
July 31 22.5% 77.5%
July 24 14.5% 85.5%

+1 more strikes not shown

Image source: Shutterstock



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