Polymarket odds dip on US–Iran ceasefire by Aug 31 after continued strikes

Polymarket Ceasefire Ladder Reprices After Reports of Continued US Strikes

Polymarket traders are now pricing a 53.5% chance of a US–Iran “effective ceasefire” being in place by the August 31 rung, down from 57.0% on the latest move, on $518,657 in matched volume. The catalyst is fresh reporting about continued US strikes, and the ladder lets traders express timing risk across multiple deadlines rather than a single yes/no.

Key Takeaways

• Market pricing: “Effective ceasefire by August 31” leads at 53.5% Yes (46.5% No).
• Why it moved: after earlier strength to 60.0%, the leading rung retraced to 53.5%, signaling more doubt about a near-term pause despite the headline catalyst.
• Timing to watch: the market resolves by 2026-08-31 23:59 UTC, while nearer rungs (July 18/24/31, Aug 14) quantify how much timing is being discounted.

A report says the US launched another wave of strikes against Iran, marking the sixth consecutive night of strikes. The headline frames the military activity as ongoing rather than winding down, a backdrop that can affect expectations for any “effective ceasefire” timeline.

Odds Curve & Liquidity Check: $518,657 Matched as Aug 31 Falls to 53.5% Yes (July 18 at 4.5%)

This is a price-ladder market, so each labeled date is its own deadline contract: “Yes” means an effective ceasefire is achieved by that date, and “No” means it is not achieved by that date. The term structure shows traders leaning toward a later window: August 31 is 53.5% Yes / 46.5% No, while August 14 is 34.5% Yes / 65.5% No and July 31 is 22.5% Yes / 77.5% No; the very near rung July 18 sits at 4.5% Yes / 95.5% No. Pricing action also looks like a pullback after a short-lived run-up: the leading rung climbed stepwise to 60.0% and then reversed down to 53.5% (a -3.5pp move from 57.0% on the latest tick), aligning with the historical summary’s bearish trend and reversal_detected=true. With $518,657 matched, the market’s “stable” consensus and moderate volatility read as disagreement mainly about timing rather than direction—more “if by late August” than “if this week.”

Watch whether the curve steepens or flattens: a renewed bid in the July 24 / July 31 rungs would indicate traders pulling probability forward, while a drift lower in August 31 would suggest even the late-window ceasefire case is being marked down ahead of the 2026-08-31 23:59 UTC resolution.

Cross-Market Watchlist: How Traders Hedge Ceasefire Timing Risk With Macro, Crypto, and Election Polymarket Contracts

Beyond the ceasefire ladder itself, traders often cross-check adjacent Polymarket contracts to hedge second-order risks and avoid overfitting to a single deadline. On the geopolitical tape, 77.5% “No” in “Will the U.S. invade Iran before 2027?”, 99.05% “No” in “Strait of Hormuz traffic returns to normal by July 31?”, and 45.5% on “Iran full airspace closure by…? (August 31)” offer a quick read on escalation vs normalization pricing, while the higher-volume “Iran leader end of 2026?” sits at 78.55% for its leading outcome as another sentiment proxy traders monitor alongside timing markets.

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: ~$518,657

Top strike rungs

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