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Strait of Hormuz traffic returns to normal by December 31?

0x5c79dfde05559b79a9cb9f7c4187e4d49632dd042572ae676952f812732591cc · Economics · 2026-08-31
20%
Agent
28%
Market Price
-8.5%
Edge
67%
Confidence
Volume: 10,049,764
Spread: 1.0c
Days to resolution: 121
Markets in event: 1
Final Rationale
Both forecasts anchored tightly on the Polymarket 28.5% proxy, but the critique correctly identifies that this price is falling sharply (-11pts/7d, -29pts/30d) and that neither forecast extrapolated the trend or weighed the zero traffic response to Aug 28 mine-clearing. The 7DMA mechanics matter: from a 1-5/day base, crossing 60 requires a sustained ~65+/day surge over a full week, meaning any deal must land by roughly November and produce immediate, uninterrupted normalization — a pattern this crisis has already falsified three times (April truce, June MOU, current blockade). Iran's active enforcement regime (45-tanker blacklist, detention/confiscation threats, 3-10% war-risk premiums) suppresses recovery speed even under a nominal settlement. I therefore move below both forecasts to 20% Yes, retaining a meaningful tail for a genuine US-Iran resolution given four months of runway and cleared shipping lanes, but treating the market anchor as still lagging the deterioration.
Price vs. prediction
How the market moved after the agent's call. Solid blue line is the actual market price; dashed line is the agent's static forecast at $t{=}0$.
$n = 3$ follow-ups
Re-scan Context
This market has been scanned before. Previous predictions:
DatePredictedMarket PriceConfidence
2026-08-24 25% 34% 58%
2026-08-17 31% 42% 56%
2026-08-01 41% 48% 38%
1. Planner Opus · Fermi decomposition + tool plan
Tools chosen: polymarket_direct claude_news gdelt_news kalshi_related polymarket_related claude_news
Sub-questions (Fermi decomposition)
  1. What is the most recent 7-day moving average of Strait of Hormuz transit calls published by IMF Portwatch, and how far below (or above) 60 is it?
  2. What was the pre-disruption historical baseline of daily Hormuz transit calls — is 60 the normal level, or above/below typical traffic?
  3. What event caused Hormuz traffic to deviate from normal (Iran-Israel conflict, attacks on shipping, closure threats), and is it ongoing or resolving?
  4. What is the current trajectory of shipping through Hormuz — are tanker/cargo transits, war-risk insurance premiums, and shipowner behavior recovering or worsening?
  5. Are there credible near-term escalation risks (Iranian threats to close the strait, military action, sanctions enforcement) that could keep transits suppressed through 2026?
  6. How quickly has Gulf shipping traffic historically rebounded after comparable disruptions (e.g., 2019 tanker attacks, June 2025 Iran-Israel war)?
Planner reasoning
This resolves YES if IMF Portwatch shows a 7-day moving average of Hormuz transit calls ≥60 anytime before Dec 31, 2026. The key facts are the current level of transit calls, the historical baseline (whether 60 is normal or elevated), and whether an ongoing disruption (e.g., Iran-Israel conflict, attacks on shipping) is suppressing traffic and how quickly it might recover. The Polymarket price is the primary anchor, with news and cross-market signals for triangulation.
2. Research Parallel tool calls
ToolStatusTimeItemsSummary
polymarket_direct OK 0.2s 1 ## This Market's Polymarket Data **Strait of Hormuz traffic returns to normal by December 31?** - Current price (probability): 28.50% - 7-day price change: -11.00% - 30-day price change: -29.00% - Total volume: $10,049,764 (USD notional) - Price range: 28.50% - 90.50% - Data points: 90 days
claude_news OK 23.1s 13 - **Current level far below threshold**: As of late August 2026, PortWatch daily transit calls were near zero — recording just 1–3 transits per day in mid-to-late August, meaning the 7-day moving average is deeply below the 60-call resolution threshold (<a href="https://straits.live/briefs/2026-08-2
gdelt_news OK 83.5s 10 GDELT: 10 articles across 3 queries (lookback=30d). 'Strait of Hormuz shipping traffic': 10 hits | 'Strait of Hormuz tanker transits Iran': error HTTPSConnectionPool(host='api.gdeltproject.org', port=443): Max retries exceeded with url: /api/v2/doc/doc?query=%28strait+OR+hormuz+OR+tanker+OR+transits
kalshi_related OK 1.7s 0 0 related markets / summaries. keyword 'Strait of Hormuz': no matches | keyword 'Iran': no matches | keyword 'oil shipping': no matches
polymarket_related OK 0.1s 5 Scanned 100 active Polymarket markets, kept 5 matches. keyword 'Hormuz': 5 markets | keyword 'Iran strike': 0 markets | keyword 'Iran Israel': 0 markets
claude_news OK 22.0s 12 ## Findings: Strait of Hormuz Traffic Normalization Outlook - **Conflict background & timeline**: Shipping traffic through the Strait of Hormuz has been largely blocked by Iran since 28 February 2026, when the US and Israel launched an air war against Iran and assassinated its supreme leader. A c
3. Evidence Brief Sonnet · 7457 chars
# Current state IMF PortWatch's 7-day moving average of Hormuz transit calls is currently far below the 60 threshold — reported at roughly 1–5 daily transits in mid-to-late August 2026 (straits.live), against a pre-crisis normal of ~85–107. The strait has been in a state of war-driven closure/blockade since February 28, 2026, with repeated failed ceasefires/MOUs, and no sustained recovery has occurred as of late August 2026. # Timeline of key events - 2026-02-28: US/Israel launch air war on Iran; Iran effectively blocks Hormuz shipping, IRGC boards/attacks vessels, lays mines (confirmed – Wikipedia, Britannica). - 2026-03: Traffic drops >90% from >100/day baseline; further declines after Iranian attacks (confirmed – claude_news synthesis). - 2026-04-08: Ceasefire/truce; traffic remains ~95% below normal despite pause (confirmed – newsonair.gov.in). - 2026-04-17/18: Iran briefly declares strait open, closes it again next day over US naval blockade dispute (confirmed – Wikipedia). - 2026-06-14: US-Iran MOU announced, strait reopened toll-free (confirmed – multiple sources); traffic recovers only partially. - 2026-07 (early): MOU collapses after Iran strikes three commercial vessels bypassing preapproved routes; effective closure resumes (confirmed). - 2026-07-17: War-risk insurance premiums reported at 3–10% of hull value, up from 0.25% pre-war (confirmed – The National). - 2026-08-12 to 08-26: Vessel counts at multi-month lows (1–5/day); Kepler/PortWatch data show sharp slowdown (confirmed – multiple news outlets, straits.live). - 2026-08-19: Some ships reportedly rerouting via Oman route as Iran claims control of strait (reported – Times of India). - 2026-08-22: Iran allows some Iraqi oil tankers through (reported – moneycontrol). - 2026-08-24: Iran blacklists 45 tankers, threatens fines/detention/confiscation for violating transit protocols (confirmed – moneycontrol). - 2026-08-25: Iran-Oman revenue-sharing arrangement and temporary shipping lane agreed; Iran maintains closure until US meets conditions (reported). - 2026-08-28: US CENTCOM says Iranian sea mines cleared from shipping lanes (confirmed – multiple outlets), but no traffic surge reported yet. - 2026-08-30: Straits.live reports Hormuz "closed to commercial shipping," Day 183 of crisis; only ~3 ships transited Aug 23 vs. ~85/day normal (confirmed). # Event Will IMF PortWatch's 7-day moving average of Strait of Hormuz transit calls reach ≥60 on any date before December 31, 2026? # Outcomes to forecast - Yes (7DMA hits ≥60 at any point before Dec 31, 2026) - No (never reaches 60) # Kalshi market anchor Kalshi-direct pricing was not returned in this research pass (kalshi_related found 0 matching tickers). Best available cross-market anchor is Polymarket's identical-question market: **YES priced at 28.5%**, down from a 90-day high of 90.5%, down 11 pts over 7 days and 29 pts over 30 days, on $10.05M volume — indicating a strong and accelerating drift toward "No." # Sub-question answers 1. **Current 7DMA vs. 60 threshold** — As of late August 2026, PortWatch shows only 1–5 transits/day (straits.live), meaning the 7DMA is roughly 55-59 points below the 60 threshold — deeply below. 2. **Pre-disruption baseline** — 2025 average 7DMA was 93.7, peaking at 107.3 on Feb 24, 2026 just before the crisis; other estimates put baseline at 73–88. The 60 threshold represents ~55-65% of normal, so "normal" is well above 60, not merely at it. 3. **Cause of deviation** — US/Israel airstrikes on Iran (Feb 28, 2026), assassination of Iran's supreme leader, followed by Iranian mining, vessel boardings/attacks, and a naval blockade. Ongoing and unresolved as of late August 2026 despite periodic diplomatic overtures (claude_news, Wikipedia). 4. **Current trajectory** — Deteriorating/unstable, not recovering: traffic fell from ~85-100/day to 3-5/day; war-risk insurance premiums up 10-40x pre-crisis (0.25%→3-10% of hull value, The National); shippers rerouting via Fujairah/Khor Fakkan/Oman/Jeddah land bridge (Lloyd's List). 5. **Escalation risks** — High: Iran blacklisting 45 tankers with threatened fines/detention/confiscation, parliament-approved fee regime (Strategic Action Plan Article 3), continued attacks (ADNOC vessel hit in August), Iran conditioning reopening on US concessions (multiple sources). 6. **Historical rebound comparison** — Unlike quick post-2019/2025 recoveries, this crisis shows a repeated cycle: ceasefire → partial MOU-driven reopening → collapse within weeks (April truce, June MOU collapse in July). No comparable precedent of full recovery within this pattern. # Key facts (high-confidence, factual) 1. [straits.live] 7DMA at 1-5 transits/day as of Aug 23-26, 2026, vs. threshold of 60. 2. [Wikipedia/Britannica] Crisis began Feb 28, 2026 with US/Israel strikes on Iran; ongoing blockade/mining since. 3. [The National] War-risk insurance premiums at 3-10% of hull value (vs 0.25% pre-war). 4. [CENTCOM via moneycontrol/gcaptain] Mines cleared from shipping lanes as of Aug 28, 2026 — a potential positive signal, but no traffic recovery yet reported. 5. [Polymarket] Identical-question YES price collapsed from 90.5% high to 28.5%, reflecting realized deterioration. # Cross-market signals - Kalshi related: no matching tickers found in this pass. - Polymarket: Same-question market YES = 28.5%, falling sharply (-11pts/7d, -29pts/30d); sister markets for shorter deadlines (Aug 31, Sep 30) priced near 0-3% YES, confirming market consensus that near-term normalization is essentially dead, with Dec 31 still holding modest residual probability. - Sportsbook implied: none available. # Analyst opinions and speculation - FutureSearch (June 2026, pre-July MOU collapse): modeled long-run probability plateauing at ~80% by Jan 2027 — now stale/outdated given subsequent re-escalation. - CRS analysis: status quo could persist "as long as US and Iran can bear the costs" — no fixed resolution timeline. - Claude_news synthesis: bottom line assesses full recovery by Dec 31 as "unlikely absent a major political resolution." # Directional lean per outcome - **Yes**: Supported by mine-clearing (Aug 28), Iran-Oman lane agreement, occasional partial reopenings (Iraqi tankers Aug 22), precedent of brief traffic spikes during MOU periods. Opposed by: current level ~55+ points below threshold, entrenched blockade, repeated failed ceasefires, rising insurance costs, active Iranian threats/blacklisting. - **No**: Supported by 6-month pattern of failed recoveries, deepening structural escalation (Iranian fee/detention regime), Polymarket's steep and consistent price decline, near-zero current traffic. This is the strongly favored outcome per all evidence. # Gaps / unknowns - No Kalshi-direct YES price was retrieved this pass; Polymarket used as proxy anchor. - Impact of Aug 28 mine-clearing on subsequent traffic not yet reflected in data. - No visibility into most recent (Sept+) PortWatch figures beyond late August. # Calibration anchors - Polymarket YES (proxy anchor): 28.5%, trending down. - Sister Polymarket markets (Aug 31, Sep 30 deadlines) priced at 0.1%-9.5% YES, suggesting near-term resolution is viewed as very unlikely but longer Dec 31 window retains some optionality. - Historical precedent: 2019 tanker attacks and 2025 Twelve-Day War saw traffic normalize within weeks after ceasefire; 2026 crisis has NOT followed this pattern despite multiple ceasefire/MOU attempts over 6 months.
4. Forecasters Opus + GPT · in parallel
claude-fable-5
0.62
Yes 24%
No 76%
Traffic is currently 1–5 transits/day versus the 60 threshold — a gap of ~55+ points — with a six-month pattern of failed ceasefires and MOU collapses (April truce, June MOU failing in July). The Polymarket anchor on the identical question is 28.5% YES and falling sharply (-29pts/30d), with sister near-term markets near 0-3%. Positive optionality remains: mines cleared per CENTCOM (Aug 28), the Iran-Oman lane agreement, and four months of runway during which a durable US-Iran deal could trigger rapid recovery (2019/2025 precedents show weeks-fast rebounds once politics resolve). I weight slightly below the market anchor given the entrenched Iranian fee/detention regime, 10-40x insurance premiums, and lack of any traffic response to mine-clearing yet.
gpt-5.6-sol
0.72
Yes 27%
No 73%
The current 7-day average of roughly 1–5 daily transits is dramatically below 60, while the pre-crisis baseline near 94 confirms that reaching the threshold would require substantial normalization. The ongoing war, blockade, vessel attacks, blacklisting, and insurance premiums of 3–10% point toward No because commercial deterrents remain severe. The trajectory and historical comparison also favor No: multiple ceasefires and reopening agreements produced only partial, short-lived recoveries before collapsing. Mine-clearing and the Iran-Oman lane agreement preserve a meaningful Yes tail, since any durable political settlement could return traffic above 60 relatively quickly. I anchor near the identical Polymarket contract's 28.5% Yes price and shade slightly lower to 27% given the repeated reopening failures and lack of a traffic response after mine-clearing.
5. Devil's Advocate Sonnet · red-team critique
1. Both forecasters anchor almost exactly on the Polymarket 28.5% figure (24% and 27%) despite the brief explicitly noting this proxy is "trending down sharply" (-11pts/7d) and that sister near-term markets are near 0-3% YES — neither forecast grapples with where the trend line would extrapolate to by the time they're forecasting, nor discounts for the fact that a decelerating market price may still be overshooting optimism relative to the ~55-point traffic gap and zero observed response to mine-clearing. 2. Both treat "mine-clearing" and the "Iran-Oman lane agreement" as meaningfully boosting the Yes case, but the brief is clear that as of Aug 28-30 there was "no traffic surge reported yet" and ships were still only running 3/day on Aug 23 vs. 85/day normal — this is being used as a bullish qualitative hedge without corresponding probability weight given the total absence of empirical follow-through. 3. Neither forecast explicitly addresses sub-question 6 (historical rebound comparison) in a way that translates into calibration: the brief states this crisis has broken the normal "quick rebound" pattern *three times* (April truce, June MOU, current blockade), which is a stronger disconfirming data point against reliance on 2019/2025 rebound precedent than either rationale credits — both still lean on "weeks-fast rebounds once politics resolve" as if this cycle hasn't already falsified that assumption twice. 4. Both forecasts underweight the compounding effect of Iran's blacklisting of 45 tankers and threatened confiscation/detention regime (Aug 24) as a structural, self-reinforcing deterrent — this isn't just "insurance costs" but an active enforcement mechanism that could suppress traffic even after a nominal political resolution, arguably lowering the ceiling on how fast a 60 threshold could be reached even if a deal is struck. 5. Neither forecast considers the specific mechanics of what "≥60 on any date" requires: since this is a 7-day moving average, even a sudden full political resolution announced in November would likely not mathematically produce a 7DMA crossing 60 by Dec 31 given the ramp-up time needed from near-zero baseline — this asymmetry argues for a lower Yes probability than either gives, since the resolution window is shrinking as 2026 progresses. 6. Both convergent estimates (24%, 27%) create a false sense of consensus/robustness — but neither model appears to have independently stress-tested the Yes case bottom-up (e.g., "what specific sequence of events in the remaining 4 months would need to happen for a full 55-point traffic recovery"), instead both essentially back-solved from the Polymarket anchor with minor adjustments, which risks anchoring bias rather than independent evidence synthesis.
6. Aggregator Opus · final calibrated forecast
20% (67% confidence)
Yes: 20% No: 80%
Both forecasts anchored tightly on the Polymarket 28.5% proxy, but the critique correctly identifies that this price is falling sharply (-11pts/7d, -29pts/30d) and that neither forecast extrapolated the trend or weighed the zero traffic response to Aug 28 mine-clearing. The 7DMA mechanics matter: from a 1-5/day base, crossing 60 requires a sustained ~65+/day surge over a full week, meaning any deal must land by roughly November and produce immediate, uninterrupted normalization — a pattern this crisis has already falsified three times (April truce, June MOU, current blockade). Iran's active enforcement regime (45-tanker blacklist, detention/confiscation threats, 3-10% war-risk premiums) suppresses recovery speed even under a nominal settlement. I therefore move below both forecasts to 20% Yes, retaining a meaningful tail for a genuine US-Iran resolution given four months of runway and cleared shipping lanes, but treating the market anchor as still lagging the deterioration.
7. Entry Decision Opus Trader
Side
NO
Position Size
$650
Contracts
903
Trader Confidence
67%
Trade Rationale
The forecast (20%) sits below the market (28.5%), an 8.5pp edge favoring NO. This is a direction-agreement trade (both sides below 50%) with sub-15pp magnitude — historically a weak setup — so it needs concrete, recent evidence the market may not have fully processed. It has that: zero traffic response to the Aug 28 mine-clearing (still ~3/day vs 85/day normal), Iran's Aug 24 blacklist/confiscation regime as an active suppressor, and the 7DMA mechanics requiring a deal by roughly November followed by an immediate sustained ~65+/day surge — a pattern this crisis has already falsified three times. The Devil's Advocate critique actually reinforces the NO side (it argues both forecasters anchored too high on a falling market price), forecaster confidence is a reasonable 0.67, and the ensemble spread is tight at 3pp. Liquidity is excellent ($10M volume, $0.01 spread) and the book has no correlated Hormuz/Iran exposure.
Allocation Logic
Sized at the low end ($650) because this is a direction-agreement edge under 15pp — the historically weakest setup class — even though the specific mechanics and lack of traffic response justify entry. The concrete recent evidence and supportive critique warrant taking the trade, but not at baseline or above.
Entry price: $0.72
Current: $0.72
Status: OPEN
P&L: $4.51
Pipeline Timing
Total pipeline time: 169.9s
Per-tool research timings shown in the Research section above.