The Strait of Hormuz, connecting the Persian Gulf to the Gulf of Oman, is the world's most critical oil chokepoint—roughly one-third of all seaborne traded oil passes through its narrow 21-mile width. Daily transit counts fluctuate based on global energy demand, geopolitical tensions, and seasonal factors. This market tracks whether average daily transits will fall within the 10–20 range on May 31, 2026. The current 7% YES odds suggest traders believe transits will either drop below 10, indicating potential blockade, major disruption, or an unusual geopolitical crisis, or exceed 20, suggesting surge demand, reduced tensions, or seasonal peaks. Historical normal operations average 20–25 transits daily for modern tanker fleets. The remarkably low odds reflect trader conviction that May 31 will deviate significantly from typical midrange volumes, betting instead on either severe constraint or record-high throughput driven by geopolitical events or market dynamics. Monitoring this figure provides real-time insight into global energy flows and regional stability perceptions.
Deep dive — what moves this market
The Strait of Hormuz has been at the center of geopolitical risk for decades, with Iran controlling its northern coast and Oman its southern side. Recent years have seen multiple incidents—drone attacks on tankers, Iranian threats to close the strait, and U.S. military posturing—all contributing to persistent shipping uncertainty. The 10–20 transit band represents a tightened scenario relative to historical norms of 20–25 daily transits under stable conditions. For YES odds to strengthen significantly, traders would need to see either sustained de-escalation in regional tensions (allowing normal flow to resume within the wider 10–20 band) or specific supply-demand dynamics that constrain traffic to this narrower window. Conversely, the 7% price implies traders heavily favor scenarios pushing outside this band entirely. A spike above 20 could result from global oil demand surging due to unexpected supply shocks, refineries rushing to fill strategic stockpiles before a feared disruption, or sudden geopolitical cooling that releases years of pent-up shipping demand. A collapse below 10 would signal serious trouble: an Iranian blockade attempt, a major accident closing the strait temporarily, a shipping company boycott due to escalated risk, or a broader Middle East conflict disrupting normal commerce. Historical precedent comes from 2019, when Iranian IRGC seizures of tankers created sharp traffic volatility, and 2022, when sanctions threatened to further constrain flows. The May 31 date sits in late spring, typically a moderate-demand period for refined products before peak summer driving season. Traders are currently pricing in a 93% chance that May transits diverge from the 10–20 band, either far tighter due to escalation or far looser due to surging demand or unprecedented de-escalation. The relatively modest liquidity ($27K total, $10K daily volume) suggests limited contract depth, potentially amplifying reversals if new geopolitical intelligence emerges. Watch for official statements from Iran's naval forces, U.S. military deployment announcements, tanker-tracking industry reports, and crude oil price swings—all early signals of whether May 31 will see constrained, normal, or surge transit volumes.
What traders watch for
Iran's IRGC naval forces issue statements on strait closure threats, shipping restrictions, or escort activities through May 31.
U.S. military announces new carrier deployments, naval exercises, or escort operations in the Persian Gulf region this month.
Crude oil prices spike or crash sharply; refiner inventory data and demand forecasts signal shipping surge or constraint.
Tanker tracking industry reports shipping delays, route diversions, or company announcements on Strait passage risk assessments this week.
How does this market resolve?
This market resolves YES if shipping traffic data confirms 10–20 average daily transits through the Strait of Hormuz on May 31, 2026. Resolution depends on publicly available tanker tracking sources and geopolitical developments through month-end.
Prediction markets aggregate trader expectations into real-time probability estimates. On Polymarket Trade, every market question resolves YES or NO based on a specific event outcome; traders buy shares of the side they believe will resolve positively. Prices range 0¢ (certain no) to 100¢ (certain yes) and naturally reflect the crowd-implied probability of YES. This page summarizes the market state for readers arriving from search; for live trading (place orders, see order book depth, execute a trade) open the full interactive page linked above.
