What Moved the Market
The Polymarket contract on whether Strait of Hormuz ship traffic returns to “normal” by June 30, 2026 declined to 22%, down 7.5 percentage points over the past 24 hours and 23.5 points over the past week. The market resolves Yes if IMF Portwatch shows a 7‑day moving average of transit calls (“Arrivals of Ships”) at or above 60 on any date from market creation (April 13, 2026) through June 30, 2026.
The shift marks a sharp repricing against a return to the 60-call threshold within the remaining June window.
Why It Likely Moved
- The repricing appears driven by reports that U.S. aircraft struck multiple Iranian military sites on June 1, including locations on Qeshm Island in the Strait of Hormuz, signaling heightened security risk in and around the waterway, according to NPR (June 1, 2026).
- The European Commission highlighted oil and gas supply risks tied to ongoing Middle East tensions in meetings of the Gas Coordination Group (May 26) and Oil Coordination Group (May 27), as noted in its official communication on May 28, 2026. This policy signal likely reinforced market caution around near-term Hormuz normalization (European Commission, May 28, 2026).
- The narrowing contract window—requiring a 7‑day moving average to reach ≥60 before June 30—likely increased time-pressure sensitivity and raised the bar for a late-June recovery in transits.
- Cross-market signals in shorter-dated, related contracts indicate reduced confidence that traffic will normalize in the first half of June, which likely bled into end‑June odds.
How Strong the Move Is
The 24-hour decline (-7.5pp) and 7-day slide (-23.5pp) both register as extreme by the market’s own historical volatility measures. This indicates a sharp, event-driven repricing rather than routine noise.
Given the contract’s near-term horizon and the extreme z-scores on both 24h and 7d windows, the move is best characterized as a significant, event-linked downdraft and a potential reversal of earlier optimism about a quick normalization.
Cross-Market Confirmation
- “Strait of Hormuz traffic returns to normal by June 15?” fell to 3.9% (24h: -2.55pp). This decline aligns directionally with the end‑June market, suggesting skepticism about a near-term rebound in transits.
- “US x Iran permanent peace deal by June 7, 2026?” dropped to 7.0% (24h: -3.0pp; 7d: -35.0pp), reinforcing reduced expectations of imminent de-escalation.
- “US x Iran permanent peace deal by June 30, 2026?” sits at 28.0% (24h: +1.0pp; 7d: -25.0pp). The slight 24h uptick diverges short term, but the weekly decline supports the broader risk-off stance on swift détente.
News & Real-World Context
- U.S. strikes on June 1 targeted Iranian military sites, including on Qeshm Island within the Strait of Hormuz, underscoring elevated security tensions in the chokepoint area, according to NPR (June 1, 2026).
- The European Commission (May 28, 2026) formally discussed risks to EU oil and gas supplies as Middle East tensions persisted into a third month, via the Gas and Oil Coordination Groups. As an official policy communication, this serves as a primary signal of perceived vulnerability in energy flows relevant to Hormuz-linked trade.
Macro context: Brent crude is at $94.91/bbl, down 8.3% over the last week and 12.3% over the last month (as of June 1, 2026). The pullback in prices does not confirm acute supply stress at the benchmark level, even as geopolitical risk headlines intensify.
Bottom Line
Odds of meeting the IMF Portwatch ≥60 transit-call threshold by June 30 have been marked down sharply amid fresh kinetic activity near Hormuz and official EU signaling on supply risks. With less than a month left and the requirement for a 7‑day average, traders appear to be assigning lower probability to a timely normalization.
This looks like an event-driven, short‑term repricing rather than a structural reassessment of maritime fundamentals, with macro oil benchmarks not corroborating acute disruption.
Market Conditions at Time of Writing
- Current Probability: 22%
- 24h Change: -7.5pp
- 7d Change: -23.5pp
- Volume (24h, $): 766,177.2
- Open Interest ($): 243,510.9
- Spread (pp): 1.0
- Z-score (24h): 28.0
