Strait of Hormuz traffic returns to normal by end of May?
I assess a low probability that IMF Portwatch will show a 7-day moving average of Strait of Hormuz transit calls at or above 60 by May 31, 2026, largely because only a few days remain and the 7-day average requires sustained high daily counts or retroactive upward data revisions.
Analysis
The technical requirements and calendar timeline strongly work against a Yes outcome: the market must see a 7-day moving average of transit calls at or above 60 on any published date through May 31, 2026, and as of May 26 there are only five days left in the window, meaning either the prior week already has to be very high or the next few daily counts must spike and be sustained long enough to push the moving average over the threshold. IMF Portwatch allows revisions made during the market's timeframe to count, which slightly increases the chance relative to only forward-looking counts because previously published low days could be revised upward before the deadline, but that depends on the source data and reporting practices rather than new ship movements alone.
Market-implied sentiment (Yes price ~2.5%) signals that traders view the event as very unlikely, consistent with both the short remaining time and generally lower Strait transit volumes seen since major regional disruptions in prior years caused persistent rerouting and risk-averse routing by container and bulk operators; absent a clear, large rebound in ship transits or a methodological expansion of Portwatch coverage during the window, the market consensus is rational. Historical patterns since the onset of major security incidents have shown that shipping lines often take time to re-route back through narrow chokepoints, and commercial incentives to resume the shortest path only return when both perceived risk and insurance costs fall materially.
Operational, demand, and seasonal factors create asymmetric possibilities: a sharp, coordinated de-escalation (e.g., ceasefire, maritime security guarantee) could quickly restore tanker and commercial transits and push daily counts up, while cargo seasonality, maintenance schedules, or a temporary closure of alternative longer routes (e.g., Suez disruption) could also concentrate transits through Hormuz; however, those events are low-probability and in many cases would still need several consecutive high daily counts to change the 7-day average in time. Conversely, continued skittishness among operators, sustained insurance premium differentials for Gulf transits, or continued intermittent attacks would keep traffic depressed and make a late spike insufficient to reach the 7-day MA threshold.
Given the sparse public news provided, the most actionable drivers left are (1) whether recent unpublished or soon-to-be-published Portwatch daily counts for the prior week are already close to the threshold, and (2) whether any reporting revisions during the market window materially increase historical published counts; absent evidence for either, the prudent assessment is that chance of Yes is small but nonzero, primarily supported by the revision-pathway and the possibility of a sudden operational spike in the next few days.
Arguments
For
- A rapid diplomatic or security turnaround could restore traffic quickly and generate several high-count days before May 31.
- Portwatch data revisions made within the market timeframe could retroactively raise the 7-day moving average above 60.
- A short-term surge in oil or commodity shipments or an incident elsewhere that diverts ships back through Hormuz could create the necessary spike.
- Temporary operational bottlenecks on alternative routes could concentrate transits through the Strait for a week.
Against
- Only five days remain in the market window, making it mathematically difficult to push a 7-day moving average over 60 unless the past week was already near that level.
- Persistent security concerns and higher insurance costs continue to incentivize rerouting away from the Strait.
- Historical shifts in routing since prior disruptions have permanently lowered baseline transit volumes through the Strait.
- IMF Portwatch may not capture all moving vessels and lags or undercounts in publication reduce the chance of observing a qualifying average.
Key drivers
- Immediate de-escalation of regional hostilities, reducing insurance and security-related avoidance of the Strait.
- A sudden, sustained rise in tanker and commercial scheduling through the Strait driven by short-term demand or rerouting from an alternative route disruption.
- IMF Portwatch revisions to previously published daily counts during the market timeframe that raise the 7-day moving average.
- Shipping companies and charterers lowering war-risk premiums and rerouting decisions that make the Hormuz route commercially attractive again.
- Seasonal or logistical port congestion elsewhere that forces more voyages through the Strait in a condensed window.
- Public or private naval escorts and clear maritime security guarantees that materially reduce operators' perceived transit risk.
Risk factors
- Ongoing or renewed maritime security incidents (attacks, seizures, near-miss events) that keep operators away from the Strait.
- Structural rerouting of traffic around Africa or via other corridors that permanently lowers baseline transit counts through the Strait.
- Insufficient time left in the market window for a sustained 7-day run of high daily counts to produce the required moving average.
- No upward revisions to Portwatch data during the allowable timeframe, leaving published averages unchanged.
- Persistent high insurance premiums and contractual reluctance among liners and bulk shippers to return to the narrow chokepoint.
- Data coverage limits or reporting lags causing undercounting of eligible ship types in Portwatch publication.
Scenarios
Best case
A rapid, public de-escalation or credible multinational maritime security guarantee is announced immediately, operators resume normal routing, and Portwatch publishes a sequence of high daily counts (or revises recent counts upward) that produces a 7-day moving average >= 60 on or before May 31, resulting in a Yes resolution.
Most likely
Traffic shows modest fluctuations or a small uptick but not enough to lift the 7-day moving average to 60 before the deadline, and although revisions are possible they are unlikely to be large or timely enough, resulting in a No resolution.
Worst case
Security incidents or continued risk-averse routing persist through the end of May, Portwatch publishes no qualifying 7-day moving average and makes no supportive revisions within the timeframe, and the market resolves to No with traffic remaining below historical 'normal' levels.
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