Will Hormuz Ship Traffic Stay Near Zero Through May?

The Strait of Hormuz, the narrow waterway connecting the Persian Gulf to the global oil market, has seen shipping traffic fall so sharply that the prediction market prices the 0-to-10 ships bracket as the most likely outcome for the end of May. That bracket, which would represent a near-total collapse compared to the waterway’s historical average of roughly 20 transits per day, now trades at 63 cents on the dollar. The math doesn’t lie: traders are pricing a historic disruption, not a temporary dip.

This market resolves using IMF Portwatch data. The platform’s 7-day moving average of transit calls for the Strait of Hormuz on May 31, 2026 determines the winning bracket. Transit calls cover container ships, dry bulk carriers, roll-on/roll-off vessels, general cargo ships, and tankers. The current implied probability sits at 62.5% for the 0-to-10 range, with the full volume of $1,625 registered in the last 24 hours alone.

How the Strait of Hormuz Traffic Contract Works

This contract asks a single question: what is the 7-day moving average of ship transit calls at the Strait of Hormuz when IMF Portwatch publishes data for May 31, 2026? The outcome brackets are 0-to-10, 10-to-20, 20-to-40, 40-to-60, and 60-plus. The contract resolves to the bracket that contains the reported value. If the value falls exactly between two brackets, it resolves to the higher one.

• The 0-to-10 bracket (YES) trades at $0.63, implying a 63% probability that average daily transit calls remain below 10 ships through late May.
• The remaining brackets (NO collectively) trade at $0.38, implying a 38% probability that traffic recovers to 10 or more ships per day.

The NO position pays out if IMF Portwatch records 10 or more average daily transit calls for the Strait of Hormuz by May 31. That requires meaningful shipping recovery, not a marginal uptick. A single vessel more than the bracket ceiling does not flip the result. The 10-ship floor represents roughly half the waterway’s historical operating baseline.

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Market Signals Point to Accelerating Conviction

Here’s what the market is missing in the raw price: the 1-hour gain of 1.0%, the 24-hour surge of 19.0%, and the trend score of 35.38 are not separate readings. They are one composite signal showing accelerating buying pressure on the 0-to-10 bracket. The jump aligns with the April 30 and May 1 price movements noted in market history, suggesting a specific development in the US-Iran standoff pushed traders sharply toward the low-traffic scenario.

Total volume stands at $1,625, with all of it arriving in the last 24 hours. The order book depth of $88,095 dwarfs the trading volume, signaling thin activity relative to available liquidity. This is a low-liquidity market. The 19% single-day price move on thin volume can reflect a small number of decisive trades rather than broad consensus. Price discovery here is real but fragile.

• The 0-to-10 bracket gained roughly 19 cents in 24 hours, rising from around 44 cents to 63 cents.
• The related market tracking US-Iran permanent peace prospects trades at 38%, keeping a diplomatic resolution scenario alive but not dominant.
• The market tracking Iranian regime stability through June 30 sits at 7%, suggesting traders do not expect a leadership change to resolve the shipping crisis.
• The April-end traffic normalization market resolved at 0%, confirming disruption persisted through April with no recovery before this market’s window opened.
• The 1-hour and 24-hour momentum both point in the same direction, reinforcing the disruption thesis rather than suggesting a fade.

Lines Analysis: Iran, the US, and the Waterway the World Cannot Afford to Lose

The 0-to-10 bracket holds at 63% for a reason rooted in observable conditions. The April traffic normalization market already confirmed disruption persisted through the end of that month. The May 1 price surge on this contract suggests a catalyst in the last 48 hours, likely tied to US-Iran negotiations stalling, Iranian military posturing near the strait, or new sanctions pressure affecting tanker operators. Shipping companies facing sanctions exposure or force majeure risk reroute around the Gulf entirely, and even partial rerouting collapses transit call counts sharply.

The alternative scenario, meaning the non-zero-to-ten brackets, gains ground if diplomatic progress between Washington and Tehran moves faster than the current 38% peace deal probability suggests. Iran reopening the strait as a negotiating gesture, a ceasefire in an adjacent theater reducing military risk premiums, or a US sanctions carve-out for humanitarian cargo could push transit calls back toward the 10-to-20 bracket. The 10-ship floor is not unreachable. It simply requires political movement that has not materialized in recent weeks.

• Any confirmed US-Iran working-level meeting before May 31 would signal easing tensions and pressure the 0-to-10 bracket lower.
• Iranian Revolutionary Guard Corps naval activity near the strait, if reported by regional monitoring groups, would reinforce the low-traffic scenario and push the bracket toward 70 cents or higher.
• A tanker operator announcing resumed Gulf transits would be the clearest operational signal that the 10-to-20 bracket is back in play.
• IMF Portwatch publishing week-over-week transit call data showing even a modest uptick would create arbitrage pressure across the brackets.
• A broader US sanctions escalation against Iranian oil exports would deepen shipper avoidance and cement the 0-to-10 outcome.

The $1,625 in 24-hour volume tells the story clearly: a small group of traders moved this market sharply on a single day’s news. The order book depth suggests the market can absorb more trading without major slippage. If new information arrives before May 31, this price can move fast in either direction. Right now, the data favors the low-traffic bracket.

LINES VERDICT

Severe Disruption Holds

The April normalization market already closed at zero, and the May bracket is pricing the same outcome with accelerating conviction. No diplomatic or operational development in the last 48 hours has reversed the conditions driving shipper avoidance of the Strait of Hormuz.

What the market says: The 0-to-10 bracket trades at 62.5%, meaning traders assign nearly two-in-three odds that Hormuz transit calls remain at historically suppressed levels through May 31. With resolution less than four weeks away and thin volume amplifying recent price moves, any credible diplomatic signal between Washington and Tehran could shift this price sharply before the deadline.

Geopolitical Context: Why the Strait Matters and What Could Change It

The Strait of Hormuz is 21 miles wide at its narrowest point and carries roughly one-fifth of global oil supply under normal conditions. Iran controls the northern coastline. Oman controls the southern shore. No alternative pipeline route fully replaces the strait’s capacity for Gulf exporters. When transit calls drop toward zero, the effect on global energy markets is immediate and measurable in freight rates, insurance premiums, and regional crude benchmarks.

The US-Iran nuclear and sanctions negotiating track has run in parallel with maritime risk for over a year. Iran has used Hormuz closure threats as diplomatic leverage in prior standoffs, including in 2019 and 2020, without following through to a full blockade. The 0% resolution of the April normalization market suggests the current disruption is more sustained than those episodes. The 7% probability on Iranian regime stability through June 30 indicates traders do not expect internal political change to resolve the maritime situation before the contract closes.

Before May 31, the events most likely to move this market are: a scheduled or emergency US-Iran diplomatic contact at the ministerial level, an Iranian naval exercise in or near the strait, a major tanker company announcing resumed or suspended Gulf operations, or IMF Portwatch publishing preliminary transit data for mid-May that either confirms or contradicts the zero-to-ten trajectory.

FAQ

• The 62.5% probability means the market collectively assigns roughly a two-in-three chance that the 7-day moving average of Hormuz transit calls falls between zero and ten ships when IMF Portwatch publishes May 31 data.
• The non-zero-to-ten brackets pay out if IMF Portwatch records 10 or more average daily transit calls. Each alternative bracket (10-to-20, 20-to-40, 40-to-60, 60-plus) represents a separate outcome, and only one resolves as correct.
• This market moves when verified events change the probability of shipping disruption: US-Iran diplomatic meetings, Iranian military activity near the strait, tanker operator announcements, and IMF Portwatch transit data updates all carry direct price implications.
• The contract resolves as soon as IMF Portwatch publishes data for May 31, 2026. If that data is not available by June 14, 2026 at 11:59 PM ET, the most recent available data prior to May 31 determines the outcome.
• Total volume of $1,625 reflects a thin market. The order book depth of $88,095 means liquidity exists, but low trading activity makes single large trades capable of moving the price significantly in either direction.