Polymarket odds hold 55% for US–Iran ceasefire by Aug. 31 after nuke news

Polymarket Ceasefire Ladder Reprices After Nuclear-Policy Catalyst, Keeping August 31 as the 55% “Yes” Anchor

On Polymarket’s ladder market for an effective US–Iran ceasefire, the latest pricing keeps the August 31 rung as the leader at 55% Yes (45% No) on $1,922,580 matched volume. The move comes as traders digest fresh nuclear-policy headlines, and the ladder lets you see how probability concentrates by deadline rather than as a single all-or-nothing bet.

Key Takeaways

• Polymarket’s leading deadline is “Effective ceasefire by August 31?” at 55% Yes (45% No).
• After the nuclear-policy catalyst, pricing remains front-loaded toward later deadlines, with earlier rungs (July 31, July 24, July 18) still heavily No.
• The market’s settlement date is 2026-08-31 23:59 UTC; the 24h and 7d net change in the leading rung is +2.0 percentage points.

A report says President Donald Trump approved an agreement with Saudi Arabia that could allow uranium enrichment for a civilian nuclear program, with an announcement expected as soon as Wednesday. The deal is described as long-term, involving US firms and a joint study that could lead to an enrichment facility, while nonproliferation experts warn enrichment can raise weaponization concerns tied to regional tensions and Iran’s program.

Odds-by-Deadline Breakdown: $1,922,580 Matched as July Rungs Stay Heavy “No” (July 18 0.15% Yes; July 24 8.5%; July 31 1

This Polymarket contract is a price-ladder by deadline: each rung is a separate Yes/No market for whether an “effective ceasefire” happens by that specific date, not a single bet on one final date. Traders are pricing low near-term odds—July 18 sits at 0.15% Yes / 99.85% No, July 24 at 8.5% Yes / 91.5% No, and July 31 at 18.5% Yes / 81.5% No—while assigning materially higher probability to more time: August 14 is 35.5% Yes / 64.5% No and August 31 is 55% Yes / 45% No. The top rung is only marginally softer versus the prior snapshot (55.0% vs 55.5%), but the market’s summary stats show a +2.0 pp net move over both 24 hours and 7 days with reversal_detected=true, consistent with choppy repricing rather than a one-way drift. With $1,922,580 matched, the ladder’s shape implies traders see the event as possible but time-consuming, with the “two week pause” framing still not translating into high confidence for the earliest deadlines.

Watch whether pricing continues to steepen toward later deadlines (a higher August 31 Yes while July/August 14 stay pinned), or whether near-term rungs like July 31 and August 14 lift together—an important tell on whether traders are updating toward imminence versus simply raising the eventual probability by the Aug 31 resolution window.

Cross-Contract Watchlist on Polymarket: How Middle East Ceasefire Odds Spill Into Macro Risk, Energy, and Crypto Volatil

If you’re tracking how this ceasefire tape might ripple across broader risk pricing, Polymarket traders are also clustering into adjacent contracts that map the same uncertainty onto logistics, leadership, and tail-risk scenarios. “Strait of Hormuz traffic returns to normal by July 31?” is leaning 98.75% No on $19,212,027 volume, while “Will the U.S. invade Iran before 2027?” sits at 72.5% No with $45,975,625 traded. On the regime side, “Iran leader end of 2026?” has “Mojtaba Khamenei” at 73.05% on $33,452,765, and for the nearer-term battlefield read, “Israel x Iran ceasefire continues through…?” is priced at 100.0% for “July 18” on $1,559,877.

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: ~$1,922,580

Top strike rungs

+1 more strikes not shown

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