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

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