Polymarket: Iran Hormuz fee odds dip to 72% for Dec 31 after ship attacks

Polymarket Reprices “Iran Charges Hormuz Fees” Odds After Shipping-Security Headlines

Polymarket traders are pricing a 72% chance that Iran charges Hormuz fees by the December 31 strike, with $1.11M matched, after the latest shipping-security headlines. The move shows how the market is distributing probability across multiple deadline strikes rather than a single yes/no bet.

Key Takeaways

• Prediction: Polymarket prices 72% Yes / 28% No for “Iran charges Hormuz fees by December 31?” (leading strike).
• Basis: After fresh reporting tied to Iran and commercial-ship attacks, the leading strike slipped from 74.5% to 72% even as volume reached $1.11M.
• Timing: The market’s resolution date is 2026-08-31 23:59 UTC, with the 24h and 7d change both at +17.5 percentage points in the summary.

A top US commander in the Middle East said Iran attacked seven commercial ships in the past week, framing a sharp jump in maritime-security risk around regional shipping lanes. The comments put renewed attention on the kinds of actions that could affect passage conditions and costs for commercial traffic.

Strike-Ladder Breakdown: $1.11M Matched as Dec 31 Holds 72% Yes vs Aug 31 at 49.5%

This is a price-ladder market: each row is a separate contract about whether fees are in place by a specific deadline, so “December 31” is a strike, not a settlement price. The ladder shows a steep time distribution: July 15 is priced at 1.45% Yes / 98.55% No, July 31 at 10% / 90%, August 31 at 49.5% / 50.5%, October 31 at 61.5% / 38.5%, and December 31 at 72% / 28%. Even with $1,106,307 in matched volume, the front end of the curve stays low while the later strikes carry most of the probability, signaling traders see timing—not direction—as the main uncertainty. On pricing dynamics, the latest tick is a 2.5-point pullback (74.5% to 72%) against a +17.5-point gain over both 24 hours and 7 days in the summary, with a neutral trend, moderate momentum, and moderate volatility—more consistent with consolidation after an upswing than a full reversal.

Watch whether probability migrates from the December 31 strike toward August 31 or October 31 (the near-resolution strikes), since that would indicate traders think implementation is accelerating ahead of the 2026-08-31 23:59 UTC resolution date.

What Traders Watch Next on Polymarket: Probability Migration Across Deadlines and Cross-Market Macro/Crypto Hedges

Zooming out from the headline contract, traders often rotate into adjacent Polymarket lines to express timing risk, second-order impacts, or broader hedges as new deadlines approach. Right now that includes 100% on “Iran military action against a gulf state on…?” (July 12) with $3,812,683 matched, 43% on “Iran announces withdrawal from MOU negotiations by…?” (August 15) with $5,590,378 matched, 98.25% No on “Strait of Hormuz traffic returns to normal by July 31?” with $16,586,181 matched, and 80.5% No on “Will the U.S. invade Iran before 2027?” with $41,618,170 matched—contracts that can pull attention and liquidity as traders reprice cross-market narratives.

Odds Trend

By the Numbers

• Platform: Polymarket
• Market: Iran charges Hormuz fees by…?
• 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: ~$1,106,307

Top strike rungs

+1 more strikes not shown

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