Strait of Hormuz traffic returns to normal by December 31?
I assess an 82% probability that IMF Portwatch will report a 7-day moving average of Strait of Hormuz transit calls at or above 60 on at least one date by December 31, 2026, because baseline traffic historically sits near that threshold and the economic incentives to transit the strait remain strong despite episodic disruptions.
Analysis
Market-implied probability (Yes ~86%) reflects strong trader belief that traffic will reach or exceed a 7-day moving average of 60 before year-end; this is a reasonable market signal given the Strait of Hormuz’s role as a primary corridor for tanker and general cargo traffic linking the Persian Gulf to global markets. Even without recent Portwatch data in hand, historical pre-crisis daily transit counts for the strait typically cluster around levels that make a 7-day average of 60 feasible, so traders are pricing in a relatively short path back to that level rather than a permanent depressed baseline. Given seven months remaining, a single sustained uptick in traffic driven by seasonal, economic, or operational changes is plausible and consistent with the market price.
From a structural shipping economics perspective, the Strait of Hormuz is intrinsically hard to substitute: rerouting through longer passages raises voyage time and bunker costs materially for tankers and many dry cargo trades, so shipowners and charterers usually prefer to resume direct transit once elevated security and insurance costs decline. Global oil and LNG demand cycles, OPEC+ production decisions, and year-end chartering dynamics tend to push vessel movements back toward pre-disruption patterns; any recovery in Gulf export flows or a seasonal demand spike for refined products could quickly increase daily transit counts. Additionally, the market only requires a single date where the 7-day moving average reaches 60, which lowers the bar compared with expecting a sustained long-term recovery.
Geopolitical risk is the principal offset to an optimistic view: renewed direct military confrontations, a targeted campaign against commercial vessels, or a long-running blockade/denial operation would reduce transits and could keep averages below 60 for extended periods. Regional incidents over the last several years have produced brief sharp drops in call counts and periods of elevated rerouting, showing that security shocks can temporarily depress Portwatch counts despite economic incentives to transit. Insurance premium spikes and proactive avoidance by major charterers for reputational or legal reasons can also suppress traffic for months even after the core incident subsides.
Data and resolution considerations slightly favor a Yes outcome: Portwatch publishes volatile daily counts and permits revisions within the market timeframe, meaning a late correction or reclassification of previously published transits could push a smoothed 7-day average across the threshold; conversely, reliance on Portwatch’s specific counting methodology and the exclusion of non-reported ships introduce noise and edge-case uncertainty. Taking all these angles together—structural economic incentives to use the strait, historical pre-disruption traffic levels, the relatively modest requirement of a single 7-day averaged peak, and persistent but surmountable geopolitical risk—I judge the probability a bit below the market but still high at 82% to reflect remaining downside tail risk.
Arguments
For
- Historically the Strait of Hormuz has hosted traffic volumes near the threshold, so returning to a 7-day average of 60 is plausible if disruptions ease.
- Economic incentives—shorter distance and lower bunker consumption—favor resuming direct transits rather than long reroutes once security concerns abate.
- Even a brief rebound in tanker or general cargo dispatches due to seasonal demand or a production uptick can lift the 7-day moving average above 60.
- Portwatch permits revisions within the market timeframe, which creates an additional path for a previously marginal period to be pushed above the threshold.
- Major charterers and operators typically move back into riskier waterways once premiums normalize, restoring traffic levels relatively quickly.
- Global energy market dynamics (price spikes or recovery in demand) could trigger higher export flows from Gulf producers, increasing transit counts.
Against
- A renewed or escalating regional conflict could suppress traffic for prolonged periods, keeping the 7-day average below 60.
- Sustained high war-risk insurance premiums or carrier restrictions could make transiting uneconomic for many vessel types.
- Portwatch’s counting rules exclude non-reported ships, so even if real-world traffic recovers some movements might not be captured in the dataset.
- Permanent or semi-permanent re-routing strategies adopted by shippers to avoid perceived risk could reduce baseline transit counts.
- Significant reductions in Gulf hydrocarbon output from sanctions or infrastructure damage would lower tanker call volumes materially.
- Recurrent small incidents creating chronic uncertainty could keep traffic depressed without a single clear spike sufficient to raise the 7-day average.
Key drivers
- Baseline historical transit levels for the Strait of Hormuz, which determine how large an uptick is needed to hit a 7-day average of 60.
- Regional oil and LNG export volumes and OPEC+ production decisions that directly affect tanker call frequency through the strait.
- Insurance costs and war risk premiums that alter commercial incentives to transit the strait versus rerouting.
- Frequency and severity of security incidents (attacks on vessels, naval confrontations, harassment) that can temporarily suppress traffic.
- Seasonal demand cycles and chartering market dynamics that concentrate vessel movements at particular times of year.
- Portwatch reporting practices and data revisions, which can materially alter 7-day moving averages even after initial publication.
Risk factors
- A major escalation into sustained military conflict in the Gulf region that forces large-scale rerouting or halts exports.
- Prolonged, significant increases in war-risk insurance or P&I restrictions that make transits uneconomic for many shippers.
- Systematic under-reporting or reporting gaps in Portwatch data that prevent observed counts from reflecting true traffic.
- A prolonged reduction in Gulf hydrocarbon exports due to sanctions, production cuts, or infrastructure damage diminishing tanker calls.
- Extended, coordinated shadowing/harassment of commercial traffic that deters transit even without open conflict.
- A sudden structural shift in trade routes or energy sourcing (e.g., rapid diversification away from Gulf supplies) that reduces long-term transits.
Scenarios
Best case
Security tensions fade, insurance premiums normalize, and a surge in seasonal exports or chartering activity produces multiple consecutive high-count days so the 7-day moving average crosses 60 well before December, with Portwatch revisions reinforcing the result.
Most likely
Periodic incident-driven dips occur but are interspersed with recovery periods and normal seasonal/market-driven upticks, and at least one sustained stretch of elevated daily calls pushes the 7-day moving average to 60 or above before year-end, yielding a Yes.
Worst case
A serious regional military escalation or prolonged campaign targeting shipping leads to widespread rerouting and strict carrier avoidance of the strait, leaving the 7-day moving average below 60 throughout 2026 and resulting in a No outcome.
More from this day
- politicsPolymarket-
US announces new Iran agreement/ceasefire extension by...?
AI65%MKT16%Edge+49Hidden GemGiven the short timeline but strong market conviction and clear U.S. incentives to avoid a lapse, I assess a modestly higher-than-even chance that the U.S. will publicly announce a qualifying extension or successor agreement by May 26.
- sportsPolymarketEnded
Where will George Pickens play in 2026-27?
AI35%MKT69%Edge-34HypedGiven Pickens' expected free agency status in 2026 and Atlanta's plausible need for outside receiving talent, I assess a below-market but meaningful probability that he signs with the Falcons for 2026-27, weighing competition from other suitors and the possibility the Steelers re-sign him or he signs elsewhere.
- politicsPolymarket2y
Republican Presidential Nominee 2028
AI25%MKT3%Edge+22Hidden GemI assess a roughly one-in-four chance that Donald Trump will win and accept the 2028 Republican presidential nomination, meaning Yes is unlikely but plausible if several favorable conditions align for him.