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.

What Traders Watch Next on Polymarket: Related Macro and Crypto Contracts to Hedge Geopolitical Risk Shocks

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

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

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