Strait of Hormuz traffic returns to normal by December 31?
I assess an 80% probability that IMF Portwatch will report a 7‑day moving average of Strait of Hormuz transit calls equal to or above 60 at least once by December 31, 2026, because commercial incentives, seasonal demand, and the possibility of upward data revisions make a late‑year rebound likely despite persistent geopolitical risks.
Analysis
Market prices currently imply strong confidence in a return to near‑normal traffic (Yes ~84.5%), and trading volume on this contract is material enough to indicate informed interest; I take that market view seriously but adjust slightly downward because the market must meet a 7‑day moving average threshold rather than a single‑day spike, which requires sustained increases in traffic. The contract’s rules (any qualifying date counts, and in‑period revisions are allowed) materially raise the probability relative to a strict single‑day test because upward revisions to previously published daily counts during the timeframe can retroactively create a qualifying 7‑day average.
Historically, commercial pressure and route efficiency have driven ships back through the Strait once direct security risks or insurance premiums decline, and global shipping often exhibits a late‑year uptick (Q4) associated with inventory building and holiday demand that favors a higher chance of crossing a fixed threshold before year end. On the operational side, shorter voyages through the Strait reduce voyage time and bunker consumption compared with long detours, so charterers and owners have strong economic reasons to resume normal transits if the security environment stabilises and insurance costs fall.
Countervailing forces include the difficulty of achieving a sustained seven‑day average above 60 rather than a single‑day spike, the potential for renewed targeted attacks or state‑backed coercion that pushes ships to reroute for prolonged periods, and the broader macro risk of depressed trade volumes if global demand weakens. Data‑specific factors also matter: reporting lags, gaps, or conservative initial counts that are later revised upward during the market window make the outcome more likely than raw daily counts might suggest, but late negative changes or reporting discontinuities could still prevent a qualifying 7‑day average.
Arguments
For
- Any qualifying date counts and in‑period upward data revisions are allowed, which raises the practical chance of meeting the 7‑day average threshold.
- Commercial actors have a strong incentive to resume the shortest routes if security risks and insurance costs fall, quickly increasing transit counts.
- Seasonal Q4 demand historically increases transit volumes, concentrating the highest probability window late in the market period.
- Coordinated naval escorts or temporary security agreements can open multi‑day windows of normalized transits sufficient to lift a 7‑day average.
- Portwatch historical reporting practices often include later upward revisions to daily counts, which can convert near‑misses into qualifying averages.
Against
- The 7‑day moving average requirement is more demanding than a single high‑traffic day and requires sustained elevated flows.
- A single major escalation or a few high‑profile attacks could re‑entrench rerouting through longer, safer passages for months.
- If insurance premiums or charterer risk aversion remain elevated, owners may prefer predictable longer routes even if security conditions modestly improve.
- Macroeconomic weakness or a drop in tanker demand could suppress traffic enough that even seasonal peaks fail to reach the threshold.
- Data publication issues, undercounting, or reporting delays could prevent a qualifying average from being published even if actual movements were higher.
Key drivers
- De‑escalation or diplomatic agreements that reduce attacks and harassment of commercial shipping in and near the Strait.
- Reduction in war risk premiums and marine insurance costs that make the short transit route economically preferable again.
- Seasonal shipping patterns that typically increase vessel movements in Q4, providing a temporal boost before year end.
- Commercial incentives for tankers and general cargo to resume the shortest route to save time and bunker costs if perceived security improves.
- Potential upward revisions to IMF Portwatch daily counts within the market window that could retroactively create a qualifying 7‑day average.
- Operational clearance and convoy arrangements by regional navies or coalitions that provide temporary windows of high transit activity.
Risk factors
- Renewed or escalating hostilities in the Gulf that cause sustained rerouting of vessels away from the Strait.
- Persistent asymmetric attacks (drones, mines, small craft) that keep insurance rates and operators’ risk aversion elevated.
- Longer‑term commercial rerouting becoming entrenched because owners prefer predictable, safer alternative routes regardless of short‑term improvements.
- Sanctions or port denial actions that reduce legitimate vessel transits through the Strait and suppress reported counts.
- Global trade slowdown or demand shock that reduces overall vessel movements and makes reaching the threshold unlikely.
- Data reporting gaps, late publication, or conservative daily counts that fail to reflect actual transit activity in time.
Scenarios
Best case
A clear de‑escalation and some combination of formal diplomatic agreements, reduced attacks, and lower insurance rates produce sustained daily transit counts in the second half of the year, and a multi‑day run in Q4 lifts the 7‑day moving average above 60—possibly aided by upward revisions to earlier published counts.
Most likely
Incremental improvements in security and commercial calculus lead to intermittent periods of near‑normal transit but only one sustained window (most plausibly in Q4) is required to push the 7‑day average to 60, making a single qualifying period before December 31 the most probable path to resolution in favor of Yes.
Worst case
A renewed or escalatory campaign of maritime harassment and/or a protracted regional conflict forces sustained rerouting around the Cape of Good Hope and keeps daily Strait transits depressed all year, with no published 7‑day moving average reaching 60 and data revisions failing to change the outcome.
More from this day
- economyPolymarket3mo
How high will inflation get in 2026?
AI33%MKT98%Edge-65HypedI assess a 33% probability that headline CPI will exceed 4.0% in any month of 2026; this is materially lower than the market-implied ~98% but reflects uncertainty about major upside shocks and the historical difficulty of re-accelerating CPI absent large energy or shelter moves.
- politicsPolymarketEnded
Elon Musk # tweets May 25 - May 27, 2026?
AI60%MKT13%Edge+47Hidden GemI assess a 60% probability that Elon Musk will post fewer than 40 main-feed/quote/repost items between May 25 12:00 PM ET and May 27 12:00 PM ET, based on typical multi-day tweet volumes, the substantial variance in his posting behavior, and the lack of known triggering events for a sustained high-volume burst.
- economyPolymarketEnded
Will __ ships transit the Strait of Hormuz on any day by May 31?
AI72%MKT50%Edge+22Hidden GemGiven historical patterns of regular commercial transits through the Strait of Hormuz, the short remaining window of six days, and no widely reported large-scale disruptions, I assess a better-than-even chance that at least one daily count will reach 20 by May 31, 2026.