Polymarket: US-Iran invasion Yes jumps to 27.5% on $44M volume

Polymarket “U.S. Invade Iran Before 2027?” Jumps to 27.5% Yes on Market-Led Repricing (No Clear Catalyst in Dataset)

On Polymarket, the “Will the U.S. invade Iran before 2027?” contract is priced at 27.5% Yes (72.5% No) on $44.27M matched volume, up 16.0 percentage points from 11.5%. The only linked headline here is unrelated sports coverage, so the move reads as market-led repricing rather than a single, clearly identified news catalyst in the provided dataset.

Key Takeaways

• Polymarket currently implies 27.5% Yes and 72.5% No on a U.S. invasion of Iran before 2027, with No the leading outcome.
• Despite an unrelated news link in this dataset, the contract repriced sharply (+16.0pp vs the prior snapshot), signaling a material shift in trader risk assessment without a documented catalyst here.
• This binary market resolves by 2026-12-31; recent history flags moderate volatility with reversal_detected true and a 24h and 7d change of -2.0pp.

The linked article is a WNBA roundup highlighting Caitlin Clark’s 45-point, 10-assist performance in a 110-107 Fever win over the Storm, plus a mix of other game results and notes on league storylines such as officiating debates and player features.

Odds & Liquidity Check: 27.5% Yes / 72.5% No With $44.27M Matched Volume, +16.0pp Reprice and Reversal Flag

This is a binary Yes/No contract: buying Yes is a bet that an invasion occurs before the 2026-12-31 resolution date; the displayed 27.5% is the market’s implied probability for that outcome, with No priced at 72.5%. The headline move is the jump from 11.5% to 27.5% Yes (+16.0pp) alongside $44.27M in matched volume, which is consistent with meaningful disagreement being traded through rather than a thin, low-volume print. At the same time, the historical_summary describes the tape as bearish with moderate momentum and moderate volatility, and it flags reversal_detected true, matching a market that has recently whipsawed rather than cleanly trending. The 24h and 7d changes are both -2.0pp, suggesting the latest leg has cooled even after the larger step-up, and the avg_last_5 of 17.9% indicates the current 27.5% sits above its recent local average.

If you are trading this market, the key operational detail is the settlement window: any position is keyed to whether the invasion condition is met by 2026-12-31. From a pricing lens, watch whether Yes holds above the recent average (17.9%) or mean-reverts, given the reversal flag and only -2.0pp net movement over both 24h and 7d in the summary.

Cross-Contract Watchlist: How Traders Hedge This Geopolitics Risk via Macro, Election, and Crypto Volatility Markets on

Zooming out from the headline contract, Polymarket traders often triangulate risk by watching adjacent markets that can move on the same information flow and offer cleaner hedges. On the Iran board, that includes 78.05% on “Iran leader end of 2026?” (Mojtaba Khamenei) with $30,661,897 matched, 50.5% on “US x Iran Effective Ceasefire by…? (2 week pause)” (August 31) on $732,955, and a lopsided 98.75% on “Strait of Hormuz traffic returns to normal by July 31?” (No) with $17,668,093 traded. Another read-through traders monitor is “Will the Iranian regime fall before 2027?” at 90.5% (No) on $22,339,261, which can act as a sentiment check when the broader geopolitical tape gets volatile.

Odds Trend

By the Numbers

• Platform: Polymarket
• Market: Will the U.S. invade Iran before 2027?
• Resolution window: Dec 31, 2026 (UTC)
• Status: Active (open for trading)
• Leading implied prob.: 27.5%
• Volume: ~$44,274,899
• Top outcomes: Yes: Yes 27.5% / No 72.5%; No: Yes 27.5% / No 72.5%

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