Will the Strait of Hormuz reopen to all LNG traffic before May 2026?

Phillip Godzin’s pgodzinai forecasts 3%

This is the full report. Condensed version here.

Perplexity response:

{think}
Let me analyze this question carefully. The user is asking whether the Strait of Hormuz will reopen to all international maritime LNG traffic before May 1, 2026.

Current date: April 23, 2026, 1:32:45 PM UTC
Resolution date: May 1, 2026
Time remaining: ~8 days

The question asks me to provide context for a superforecaster, so I need to:

1. First, plan what information I need
2. Then provide a list of 10 citations with their details
3. Then provide substantive context

Let me review what the search results tell me:

From the search results provided:

1. Kpler article (from April 17): Iran announced the strait was open for commercial traffic during ceasefire. Three LNG tankers signaled movement. Iran’s Foreign Minister Abbas Araghchi said passage for all commercial vessels was fully open with coordinated routes.
2. Energy Connects article: Transits halted after Saturday when ships came under gunfire. Iran warned against crossings. After initially being open, Iran closed the strait again after the US refused to lift its naval blockade. Only 18 commercial ships managed complete outbound transits in the brief period. No crossings on Sunday.
3. Business Insider article: Iran announced Friday the strait was “completely open.” By evening, ships were being turned away. By Monday, only 3 ships passed through. Movement has largely halted.
4. S&P Global article (April 21): On April 20, only Iran-linked vessels transited. Traffic at around 10% of prewar levels. 29 vessels exited over the weekend.

So the situation is:

• Friday (April 18?): Iran announced strait was completely open
• Saturday: Brief surge with ships attempting transit, gunfire incidents, ships turned back
• Sunday: No crossings
• Monday: Only 3 ships crossed
• April 20-21: Only Iran-linked ships transiting, traffic at ~10% of prewar levels
• The strait is currently closed or severely restricted to Iran-linked vessels only, not open to all international maritime LNG traffic.

With only 8 days remaining until the resolution date, I need to assess whether conditions could shift dramatically. I have limited search results—only 4 sources—but need to provide 10 citations for the superforecaster. The trajectory shows an initial opening announcement followed by rapid closure and restriction, with no clear indicators of imminent reopening to international traffic. I only have 4 search results available, not the 10 citations requested. I should be transparent about this limitation while providing substantive analysis based on what’s provided.

The most recent data from April 20-21 shows traffic at roughly 10% of prewar levels with only Iran-linked vessels transiting. There was a brief announcement on April 18 that the strait had reopened, but this was reversed within hours. With 8 days remaining and the resolution criteria requiring the strait to be “no longer halted or severely restricted,” the current state—restricted to Iran-linked ships only—clearly doesn’t meet that threshold. The pattern over recent days has trended toward tightening restrictions rather than opening, and the quick reversal of the April 18 announcement suggests instability in any potential reopening.

Analysis of Strait of Hormuz LNG Traffic Status

Step-by-Step Information Assessment:
To evaluate whether the Strait of Hormuz will reopen to all international maritime LNG traffic before May 1, I need to assess:

• Current status of maritime traffic through the strait (as of April 23)
• Recent trajectory of openings/closures and reversals
• Types of vessels currently transiting (Iranian-linked vs. international)
• Indicators suggesting stability or further disruption
• Timeline constraints (8 days remaining)

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Source Summary Overview

Note: Four search results were provided covering the period of April 17-21, 2026. Here is their content:

[1] Kpler – “LNG tankers move from Das Island as Iran opens Strait of Hormuz transit during ceasefire” (April 17, 2026)
On April 17, Iran’s Foreign Minister Abbas Araghchi announced that passage for all commercial vessels through the Strait of Hormuz was fully open during the ceasefire period, with transit coordinated through designated routes. Three Adnoc-linked LNG tankers (Umm Al Ashtan, Mraweh, and Al Hamra) signaled movement toward LNG facilities, with Al Hamra and Mraweh identified as likely candidates to attempt transit in the coming days. The announcement followed military escalation between Iran, the US, and Israel beginning February 28, which had stranded LNG vessels as operators adopted a cautious approach.

[2] Energy Connects – “Hormuz Shipping Traffic Grinds to a Halt as Tensions Deepen” (date in article indicates Saturday-Sunday sequence)
Following Iran’s initial opening announcement, a brief surge occurred on Saturday with 18 commercial ships managing outbound transits and 10 making inbound crossings, including four tankers with crude oil. However, the strait was closed again after the US refused to lift its naval blockade of Iranian vessels, and ships came under gunfire in the waterway. By Sunday, no crossings were observed, and at least 13 oil tankers had turned back toward the Gulf, leaving millions of barrels of oil and large quantities of LNG locked within the Gulf.

[3] Business Insider – “Is the Strait of Hormuz Open? Here Is What Ship-Tracking Data Shows” (April 2026)
On Friday morning (April 18), Iran announced the strait was “completely open,” but by evening, ship-tracking data showed ships being turned away. By Monday, maritime traffic had ground largely to a halt, with only three ships passing through according to Kpler data. The narrow chokepoint’s opening had been a central demand during the fragile ceasefire and Washington-Tehran negotiations.

[4] S&P Global – “Strait of Hormuz traffic remains low as only Iran-linked ships transit” (April 21, 2026)
As of April 20, only Iran-linked vessels transited the Strait of Hormuz, with 14 total ships crossing (8 exiting, 6 entering). Hormuz traffic remained at approximately 10% of prewar levels after 29 vessels exited over the weekend. Since the conflict’s start, Iranian oil has continued moving largely unimpeded, with 64 million barrels of crude confirmed to have exited the strait.

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Current Status Assessment

Critical Finding: As of April 20-21, 2026, the Strait of Hormuz remains severely restricted, with traffic at approximately 10% of prewar levels and only Iran-linked vessels transiting[4]. This does not satisfy the resolution criteria of being “no longer halted or severely restricted.”

Trajectory of Recent Events:

• April 17-18: Iran announced strait was “completely open” for all commercial traffic[1][3]
• Saturday (April 19): Brief window of increased activity with ~28 transits before closure[2]
• Sunday (April 20): Complete halt; no crossings observed[2]
• April 20-21: Only Iran-linked vessels transiting; international traffic effectively blocked[4]

Pattern Observed: The past week demonstrates rapid reversals between announced openings and actual closures. Iran’s foreign minister announced passage was “fully open” on April 17[1], yet by April 20-21, international maritime traffic had been reduced to Iran-linked vessels only, representing a return to severe restriction rather than genuine reopening.

Time Constraint: With 8 days remaining until May 1, 2026, a sustained reopening would require immediate stabilization and reversal of the current restrictive trajectory.

Grok response:

1. Title: Strait of Hormuz Live Tracker
   Description: Live monitoring dashboard for Strait of Hormuz traffic.
   Published: April 23, 2026
   Summary: As of April 23, the strait is restricted with only 5 ships transiting in the last 24 hours (8.3% of normal 60 daily average). No LNG carriers reported transiting; 280 vessels stranded including 85 tankers, putting 20% of world LNG at risk. Traffic throughput at 7.8% of average amid ongoing seizures and high insurance premiums.[1][2]
2. Title: 2026 Strait of Hormuz crisis
   Description: Wikipedia timeline of the crisis.
   Published: April 23, 2026 (ongoing updates)
   Summary: Iran closed the strait on Feb 28 amid war start; brief exceptions for select nations in March, temporary ceasefire opening on April 17 allowing some ships but revoked April 18 with new restrictions. As of April 23, traffic minimal/zero with US blockade on Iranian ports and ongoing strandings of 2,000 ships. No full unrestricted LNG reopening noted.[3]
3. Title: Shipping traffic through Hormuz still largely halted
   Description: Reuters report on April 21 traffic.
   Published: April 21, 2026
   Summary: Only 3 ships passed in 24 hours (vs normal 140), including one LPG tanker; no LNG mentioned. Halt due to US port blockade prompting Iranian restrictions; Iran briefly opened April 17 but closed again after firing on vessels. 61 supertankers trapped inside Gulf with 2M barrels each; UN warns against risking seafarers.[4]
4. Title: LNG Tankers Make U-Turns From Hormuz as Iran Keeps Strait Shut
   Description: Bloomberg on LNG movements.
   Published: April 18, 2026
   Summary: Qatar-loaded LNG tankers reversed course after Iranian warnings; 5 tankers halted westward transit. No successful LNG exits post-April 17 announcement. Highlights risks despite brief opening claims.[2]
5. Title: Strait of Hormuz Traffic Is at a Standstill Again
   Description: New York Times on traffic slowdown.
   Published: April 20, 2026
   Summary: Only 5 ships crossed on April 19 (Monday); traffic near halt per tracking data. No specifics on LNG but overall chokepoint for 20% global LNG severely impacted. Ongoing US-Iran tensions prevent normalization.[5]
6. Title: Iran says Strait of Hormuz cannot be re-opened due to…
   Description: BBC on Iranian statements.
   Published: April 23, 2026 (12 hours ago)
   Summary: Iran’s negotiator states reopening “not possible” amid US ceasefire breaches. Ties directly to war escalation. No progress on full access for international traffic.[6]
7. Title: The Strait of Hormuz: Alternative routes for oil exporters
   Description: CNBC on ongoing closure impacts.
   Published: April 23, 2026 (3 hours ago)
   Summary: Little clarity on end to US-Iran conflict; strait used as leverage with no full reopening. Exporters seek alternatives as LNG/oil flows disrupted. Published today highlighting persistent restrictions.[7]
8. Title: Strait of Hormuz traffic halted despite Iran’s open passage claim
   Description: CryptoBriefing on market odds.
   Published: April 19, 2026 (4 days ago)
   Summary: Traffic halted despite Iranian claims; normalization by April 30 at 12% YES on prediction markets. No LNG resumption. Reflects expert skepticism.[8]
9. Title: Iran attacks ships in Hormuz Strait, U.S. extends ceasefire…
   Description: NPR live updates.
   Published: April 22, 2026
   Summary: Iran renewed attacks on vessels April 22; US seizes Iranian ship. Traffic remains disrupted. No LNG normalization amid seizures.[9]
10. Title: Strait of Hormuz traffic dips as US enacts blockade
    Description: S&P Global on early blockade effects.
    Published: April 14, 2026
    Summary: Traffic drops post-US blockade; first non-Iranian LPG since March but LNG halted. Ships avoid due to mines/warnings. Data shows persistent low volumes into late April.[10]

The Strait of Hormuz, vital for ~20% of global LNG (primarily Qatari exports to Asia/Europe), has been severely restricted since Iran closed it on February 28, 2026, at the war’s outset, with traffic dropping to near zero initially.[3][11] Brief exceptions allowed select non-Western ships (e.g., Chinese, Indian LPG in March), but no unrestricted international LNG transits occurred, and attacks/mines deterred most.[3] A ceasefire around April 8 led to Iran’s April 17 “full opening” announcement, enabling ~12-20 ships briefly, but it was revoked April 18 after US blockade refusal, with shots fired and U-turns by LNG tankers.[4][2]

As of April 23, traffic remains halted: 5 ships/24h (vs. normal 60-140), no LNG transits reported in trackers; 280+ vessels stranded (85 tankers), war risk insurance at 1% premiums (6.7x normal).[1][4] Recent seizures (Iran: 11 ships, US/UK:4) and attacks (e.g., April 22-23 videos of IRGC actions) confirm severe restrictions; UKMTO rates risk “critical” with navigation interference/mines.[12] No major outlet (Reuters, NYT, Bloomberg) reports full reopening to all international LNG; Iran blames US “breaches,” stating impossible now.[6]

Shipping experts (BRS, Kpler) note tankers trapped with millions of barrels; UN/IMO urge caution for 20,000 seafarers; execs tell CNBC no plans to risk LNG runs amid uncertainty.[4][13] Prediction markets (Polymarket) price ~12-28% for April 30 normalization, dropping post-reimposition; EIA forecasts prolonged shut-ins (9.1M b/d oil equivalent impacts).[8][14] Recent updates (April 21-23) show no movement toward unrestricted LNG; volatility high with failed talks, mine-clearing (6 months Pentagon est.), toll demands.[15]

Extracted resolution criteria links:
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Extracted resolution criteria links:
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GPT Binary response:

The case for No is strong because the resolution bar is fairly high and the time window is very short.

Key points I’m weighting most heavily:

1. Current status is far from “reopened to all international maritime LNG traffic.”
   The best recent reporting says traffic is still severely restricted, with only a handful of ships transiting and essentially no normal LNG flow. Reuters, Bloomberg, BBC, NYT, and S&P-style reporting all point the same direction: the strait is not functioning normally for international LNG shipping.
2. The recent “opening” attempt failed almost immediately.
   Iran’s April 17–18 announcement that passage was open did not translate into a stable reopening. Ships were turned back, traffic fell again, and by Apr. 20–23 the situation had re-hardened. That makes me discount future announcements unless they are accompanied by actual resumed broad traffic.
3. The resolution criteria are stricter than “some ships got through.”
   It must be reported by major outlets that the strait has reopened to all international maritime LNG traffic, meaning the halt or severe restriction is no longer in effect. A token convoy, selective access, or a temporary/fragile opening probably won’t be enough.
4. There are only about 8 days left.
   In forecasting short windows, the default state matters a lot. The default is continued severe restriction. Even if diplomacy improves, implementation, insurer approval, shipowner risk tolerance, naval deconfliction, and media confirmation all have to line up quickly.
5. Still, this is not near-zero.
   The reason this is not a 1–3% forecast is that chokepoint access can change abruptly if there is a political deal. The prior brief opening shows authorities can alter the operational status quickly. If a ceasefire or naval deconfliction deal lands, shipping could resume faster than in a normal commercial disruption.

A rough scenario breakdown:

• Main path: continued conflict / unstable restrictions through Apr. 30 → overwhelmingly No.
• Upside path: rapid diplomatic breakthrough in the next week, followed by credible reopening and media confirmation → Yes, but clearly minority odds.
• False-positive path: another announcement of reopening without broad, actual LNG resumption → still likely No under these criteria.

Assumptions that most matter:

1. Assumption: no major de-escalation deal is reached in time.
   Chance this assumption is wrong: about 20%.
   If wrong, Yes odds rise meaningfully.
2. Assumption: any reopening before May 1 would still be partial/fragile rather than “all international LNG traffic.”
   Chance wrong: about 15%.
   This is important because the resolution standard is strict.
3. Assumption: major outlets will not characterize the situation as fully reopened unless traffic is genuinely normalized or close to it.
   Chance wrong: about 10%.
   A looser media framing could produce a Yes from less-than-full normalization, but I think that is less likely.

I’d put the short-horizon probabilities roughly as:

• Within 48 hours: very low, around 3–5%
• Before May 1: low but not negligible
• By end of May: materially higher than this question, because diplomacy has more time to work

Overall, the combination of very little time, currently near-closed conditions, failed recent reopening, and strict resolution language outweighs the possibility of a sudden breakthrough.

Probability: 11%

The extracted probability is: 11%

GPT Binary response:

The default outcome here is clearly No, and with only about a week left, that default should dominate the forecast.

Why the base case is strongly negative:

• The most reliable recent reporting says the strait is still severely restricted, not broadly reopened.
• Reuters, S&P Global, Bloomberg, NYT, and BBC all point in the same direction: traffic remains far below normal, LNG traffic is not flowing normally, and in the latest reporting only Iran-linked vessels or a tiny handful of ships are transiting.
• The key resolution phrase is not merely “some ships got through” or “Iran announced it was open.” It requires major outlets to report that the strait has reopened to all international maritime LNG traffic, meaning LNG passage is no longer halted or severely restricted.
• The April 17–18 episode is especially informative: there was an announced opening, but it quickly reversed. That sharply lowers the evidentiary value of any fresh verbal reopening claims unless they are paired with stable, observable traffic normalization.
• As of April 23, there are also fresh signs against reopening: continued attacks/seizures, very low traffic, elevated war-risk premiums, and Iranian statements that reopening is “not possible” under current conditions.

Time-to-deadline matters a lot:

• If this question were “by June 1,” the probability would be materially higher.
• But for before May 1, the event needs to happen very soon, and not just as a token or disputed opening; it must be broad enough that major outlets characterize LNG traffic as no longer halted or severely restricted.
• In short-horizon forecasting, especially during wars, the base case usually persists unless there is a clear forcing event. Right now, the forcing event would have to be a rapid diplomatic breakthrough, deconfliction, and enough operational confidence for LNG shipping to resume broadly.

A useful decomposition:

1. Chance of a meaningful diplomatic/military de-escalation in the next 8 days: low.
2. Chance that such de-escalation specifically leads to reopening for all international LNG traffic, not just selective or symbolic passage: also limited.
3. Chance that major outlets describe that threshold as met before May 1: narrower still.

That leaves a small but real tail probability. Why not near-zero?

• There was already one brief opening attempt, so we know the parties can at least move toward temporary transit arrangements.
• Economic pressure is immense.
• A last-minute ceasefire implementation or negotiated shipping corridor is not impossible.

But the burden for a Yes is high, and current conditions are far from it.

Short timeline checks:

• By April 25: very unlikely.
• By April 28: still low.
• By May 1: slightly higher only because of a few more days for diplomacy, but still clearly below 1-in-10-ish to low-teens territory.

Key assumptions that could be wrong:

1. Assumption: Current restrictions remain materially in place through the next week.
   Failure chance: about 15%.
   If wrong, the Yes probability rises a lot.
2. Assumption: Resolution requires a real, broad reopening, not just an announced opening or a few escorted LNG transits.
   Failure chance: about 20%.
   If the market resolves generously on rhetoric or limited movement, Yes becomes more plausible.
3. Assumption: The latest reporting is not already stale because of a fast-moving diplomatic breakthrough.
   Failure chance: about 10%.
   This is the main source of tail risk in such a short-deadline conflict question.

After adjusting for those tail risks and for my own tendency toward overconfidence, I still land at a low probability.

Probability: 9%

The extracted probability is: 9%

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Anthropic Binary response:

Strait of Hormuz LNG Traffic Reopening Analysis

Current Situation Assessment (April 23, 2026)

The evidence is overwhelmingly against reopening within the 8-day window:

Most recent and critical data points:

• Today (April 23): Iran’s negotiator explicitly stated reopening is “not possible” due to US ceasefire breaches (BBC, 12 hours ago)
• April 22: Iran renewed attacks on vessels; US seized an Iranian ship (NPR)
• April 23: Only 5 ships transited in last 24 hours (~8% of normal 60/day), with zero LNG carriers (Hormuz tracker)
• 280+ vessels stranded, including 85 tankers; war risk insurance at 6.7x normal
• Pentagon estimates 6 months for mine-clearing operations

Pattern of failed reopening attempts:

• April 17-18: Iran announced strait “completely open” → revoked within hours after US blockade refusal
• LNG tankers specifically made U-turns after Iranian warnings (Bloomberg, April 18)
• Brief window allowed ~28 ship transits before re-closure with gunfire

Probability Framework

Key assumptions whose failure would change the forecast:

Assumption	Probability of Failure	Impact
No ceasefire/diplomatic deal in 8 days	~85-90% this holds	If deal occurs, opens path to YES
Even with deal, full LNG reopening takes weeks (mines, insurance, logistics)	~80% this holds	Conditional on deal, still unlikely
Iran maintains stated position from today	~90% this holds	Most direct blocker

Conditional probability chain:

• P(diplomatic breakthrough in 8 days) ≈ 10-15%
• P(full LNG reopening | breakthrough) ≈ 15-25% (mines, insurance, logistics delays)
• Combined: ~2-4%

Cross-validation with prediction markets:

• Polymarket prices ~12-28% for broader “normalization” by April 30 (easier criterion than “all international LNG”)
• LNG-specific full reopening should be priced significantly below this

Base rate consideration:

• No precedent for this scale of strait closure reversing fully within 8 days
• Historical closures (e.g., Tanker War 1984-88) lasted months/years
• The trajectory is moving away from reopening (attacks escalating, Iran hardening position)

Summary

With Iran explicitly stating today that reopening is impossible, active military operations as recently as yesterday, zero LNG transits currently, mine-clearing estimated at 6 months, and only 8 days remaining, the probability of full reopening to all international LNG traffic is extremely low. Even the most optimistic diplomatic scenario faces insurmountable logistical barriers within this timeframe.

Probability: 3%
The extracted probability is: 3%

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Anthropic Binary response:

Reasoning and Analysis

Current Situation (April 23, 2026)

The Strait of Hormuz has been closed or severely restricted since February 28, 2026, when the war in Iran began. The most critical data points are:

• Today (April 23): Iran’s negotiator explicitly stated reopening is “not possible” due to US ceasefire breaches (BBC, 12 hours ago)
• April 22: Iran renewed attacks on vessels; US seized an Iranian ship
• April 20-23: Only ~5 ships per 24 hours transiting (vs. 60-140 normal), zero LNG carriers reported
• 280+ vessels stranded including 85 tankers; war risk insurance at 6.7x normal
• Pentagon estimates mine-clearing alone would take ~6 months

Failed Reopening Precedent

The April 17-18 “full opening” announcement is extremely informative:

• Iran declared the strait “completely open” on April 17
• Within ~24 hours, ships were being fired upon and turned away
• By April 20, traffic collapsed to Iran-linked vessels only (~10% prewar levels)
• LNG tankers specifically made U-turns after Iranian warnings

This demonstrates that even an announced reopening doesn’t translate to actual unrestricted LNG traffic, and that diplomatic conditions for sustained opening don’t currently exist.

Resolution Criteria Bar

The question requires the strait to be “no longer halted or severely restricted” for all international maritime LNG traffic. This is a very high bar requiring:

1. Diplomatic/military agreement
2. Actual cessation of hostilities in the waterway
3. Insurance and operational readiness for LNG carriers
4. Verified safe passage (mine-clearing, etc.)

Key Assumptions That Could Alter the Forecast

Assumption	Probability of Failure	Impact
No major diplomatic breakthrough in next 8 days	~8% chance of breakthrough	Even a deal wouldn’t immediately restore full LNG traffic due to operational/safety lag
Iran maintains current restrictions	~10% chance they unilaterally reopen	Previous attempt lasted <24 hours; same dynamics likely
Physical obstacles (mines, insurance, operational readiness) prevent immediate resumption	~5% these could be overcome quickly	Pentagon says months for mine-clearing

Prediction Market Context

• Polymarket prices normalization by April 30 at ~12-28% (but this is a lower bar than full LNG reopening to all international traffic)
• The specific question’s resolution criteria is stricter than general “normalization”

Timeline Consideration

• Probability of reopening within 1 week (by May 1): Very low
• Probability of reopening within 1 month: Low (~10-15%)
• Probability of reopening within 3 months: Moderate (~25-35%)
• Probability of reopening within 6 months: Moderate-High (~40-55%)

The 8-day window is extremely constrained given:

1. Iran’s explicit refusal TODAY
2. Active military operations
3. Failed precedent just 5 days ago
4. Physical infrastructure barriers (mines)

Final Assessment

With Iran explicitly stating today that reopening is impossible, active military confrontation continuing, a failed opening attempt just days ago, and only 8 days remaining, the probability of full international LNG traffic restoration is extremely low. Even the more generous prediction market odds (~12%) apply to a lower bar of general traffic normalization. The specific requirement for “all international maritime LNG traffic” to be unrestricted pushes this lower still.

Probability: 3%
The extracted probability is: 3%

Gemini Binary response:

This is a binary outcome question with a very short timeline. My analysis must focus on the immediate barriers to reopening and the likelihood of those barriers being removed in the next seven days.

Reasoning Rationale

1. Current Status is Far from Resolution: As of April 23, 2026, the Strait of Hormuz is “severely restricted.” Traffic is approximately 5-10% of its normal volume, with reports indicating that no international LNG carriers are transiting. Recent updates confirm continued military activity, including ship seizures and attacks, with the UK’s maritime authority rating the risk as “critical.” The current situation is the opposite of the resolution criteria, which requires the strait to be “no longer halted or severely restricted” for “all international maritime LNG traffic.”
2. Extremely Short Timeline: The resolution deadline is May 1, 2026, leaving only seven full days for a complete reversal of the current military and political situation. Such a rapid de-escalation during an active war is highly improbable. The base rate for resolving major geopolitical conflicts and restoring full commercial operations in a contested strait within one week is exceedingly low.
3. Failed Reopening and Lack of Trust: A critical event was the failed reopening attempt around April 17-18. Iran announced a “full opening,” but this was revoked within 24-48 hours amid reports of gunfire and a refusal by the US to lift its blockade. This “head fake” has destroyed trust. Even if a new political agreement were announced, shipping companies and their insurers would likely wait for a period of demonstrated, sustained safety before resuming transit, a process that would almost certainly take longer than the seven days remaining.
4. Hardening Political Stances: The primary driver of the closure is the ongoing war. Recent diplomatic signals are negative. An Iranian negotiator was quoted on April 23 stating that a reopening is “not possible” due to alleged US ceasefire breaches. This indicates that the political will for a swift reopening is absent and that the strait is being used as a point of leverage in the conflict.
5. Logistical and Physical Barriers: Beyond any political agreement, significant logistical hurdles remain. These include the high cost of war risk insurance (reportedly 6.7 times normal levels), the physical danger from potential naval mines (which the Pentagon estimated could take six months to clear), and active interference with vessel navigation. It is implausible that these risks could be neutralized and certified as safe for all traffic, particularly high-value LNG carriers, before May 1.

Key Assumptions & Probabilities of Failure:

• Assumption 1: There will be no sudden, durable ceasefire and security agreement between Iran and the US/allies that is implemented in the next seven days.
  • Probability of this assumption being incorrect: Very low, estimated at <5%. The current trajectory is one of continued conflict, not imminent resolution.
• Assumption 2: Even if a political deal were announced, shipping and insurance companies would not immediately resume full LNG traffic due to the “trust deficit” from the April 18 reversal and ongoing physical risks.
  • Probability of this assumption being incorrect: Extremely low, estimated at <2%. Standard risk management practices would prevent an immediate return to normal operations in a volatile war zone.

Conclusion:

Given the active conflict, the failed reopening attempt, the hardening political rhetoric, and the significant logistical barriers, the probability of the Strait of Hormuz reopening to all international LNG traffic in a “not severely restricted” manner within the next seven days is extremely low. The event would require an extraordinary and improbable sequence of positive political, military, and commercial developments.

Probability: 3%

The extracted probability is: 3%

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Anthropic Binary response:

Analysis: Strait of Hormuz Reopening to LNG Traffic Before May 1, 2026

Current Situation Assessment (April 23, 2026)

The evidence is overwhelmingly against reopening within the 8-day window:

Most critical recent signals:

• Today (April 23): Iran’s negotiator explicitly stated reopening is “not possible” due to US ceasefire breaches — this is the most recent and authoritative statement
• April 22: Iran renewed attacks on vessels; US seized an Iranian ship — active military operations continuing
• April 23: Only ~5 ships transited in 24 hours (8.3% of normal ~60 daily average); zero LNG carriers reported
• 280+ vessels stranded, including 85 tankers; war risk insurance at extreme levels (6.7x normal)

Failed precedent of April 17-18 opening:
The brief “complete opening” announced April 17-18 was reversed within hours, with LNG tankers making U-turns after Iranian warnings and gunfire. This demonstrates that even announced openings don’t translate to actual LNG transit.

Key Assumptions That Could Alter Forecast

No diplomatic breakthrough in 8 days (~93% confident this holds)

• Iran stated TODAY reopening is impossible; active fighting continues; US blockade ongoing
• If wrong: a breakthrough would still need to translate to verified, unrestricted LNG transit

Military situation doesn’t dramatically change (~95% confident)

• Pentagon estimates 6 months for mine-clearing alone
• Both sides have escalated, not de-escalated, since the brief April 17 opening

Even if partially opened, won’t meet “all international maritime LNG” threshold (~97% confident)

• Resolution requires traffic “no longer halted or severely restricted”
• Even the April 17-18 “opening” only achieved ~18 outbound transits (mostly non-LNG) before collapsing

Probability Calculation

• P(sudden ceasefire + full diplomatic agreement in 8 days): ~5%
• P(agreement translates to verified full LNG reopening, not just announcement): ~25%
• P(this meets “all international maritime LNG traffic” standard per major news outlets): ~50%
• Combined via diplomatic path: ~0.6%
• P(unilateral Iranian decision to fully reopen): ~2% (contradicted by today’s statement)
• P(this holds and is verified as genuine): ~30%
• Combined via unilateral path: ~0.6%
• Prediction markets priced normalization at ~12% as of April 19, but this was BEFORE:
• April 22 renewed attacks
• April 23 “not possible” statement from Iran
• Current adjusted market estimate likely ~5-7% for broader “normalization”
• Full LNG reopening is a stricter criterion than general normalization

Adding all scenarios: approximately 3%

Probability: 3%
The extracted probability is: 3%

GPT Binary response:

The key question is not “could a few ships get through?” but whether, before May 1, major outlets will report that the Strait of Hormuz has reopened to all international maritime LNG traffic—i.e., LNG transit is no longer halted or severely restricted.

My read is that this is still a low-probability outcome.

Why I’m low:

• The latest high-quality reporting is strongly negative. Reuters, S&P Global, Bloomberg, NYT, and BBC all point in the same direction over Apr. 18–23: traffic remains far below normal, only a handful of ships are transiting, LNG carriers are not resuming normal passage, and in some cases only Iran-linked vessels are moving.
• The most recent trajectory is worse, not better. Iran’s Apr. 17–18 “open” announcement briefly suggested a path to reopening, but it was reversed very quickly. That failed opening is evidence that reopening is technically possible, but also that it is politically unstable and easily revoked.
• The resolution bar is fairly strict. This is not about a symbolic or partial reopening. If traffic is still selective, sporadic, or effectively deterred by gunfire, seizures, mines, or insurance constraints, it likely does not count as “reopened to all international maritime LNG traffic.”
• Time is very short. There are only about 8 days left. For a Yes, you likely need:

1. a meaningful de-escalation or deal,
2. a clear operational reopening,
3. LNG shippers/insurers to accept the corridor,
4. major outlets to characterize the strait as reopened to all international LNG traffic.

That is a lot to happen in one week.

What pulls the number up from near-zero:

• There is huge economic pressure to reopen Hormuz.
• The Apr. 17 attempt showed the status can change quickly if Tehran/Washington reach even a limited understanding.
• Because this resolves on whether reopening is reported before May 1, a late-April breakthrough could be enough even if it later proves fragile.

My rough scenario split:

• Status quo or worse through May 1: 70%
  Severe restrictions persist; maybe a few non-LNG ships pass, but no broad reopening.
• Partial/selective reopening that still likely fails criteria: 21%
  Some ships or even some gas-related vessels move, but traffic remains restricted or too uncertain to qualify as “all international maritime LNG traffic.”
• Genuine broad reopening meeting criteria: 9%

Shorter/longer horizon check:

• By Apr. 25: about 3%
• By May 1: 9%
• By June 1: around 28%

That shape makes sense to me: not impossible, but the next 8 days are especially unfavorable because the current default is entrenched closure/severe restriction.

Assumptions most likely to be wrong and most important:

1. Current reporting accurately reflects the real operational situation, not a stale snapshot.
   Chance this assumption is wrong: 20%
   If wrong, and negotiations are closer to success than reported, the Yes probability rises materially.
2. “Reopened to all international maritime LNG traffic” will be interpreted strictly, not loosely.
   Chance this assumption is wrong: 15%
   If a brief announced reopening plus a few LNG passages is enough, Yes becomes more plausible.
3. Even after a political announcement, insurers/operators will still move cautiously.
   Chance this assumption is wrong: 25%
   If carriers are ready to resume almost immediately once signaled, reopening could be reported faster than I’m assuming.

Net: the positive path exists, but with only days left and the latest evidence still showing severe restriction, the base case remains No.

Probability: 9%

The extracted probability is: 9%

All predictions: [3, 3, 3, 3, 9, 9, 11]
Filtered predictions: [3, 3, 9]

Median reasoning:

This is a binary outcome question with a very short timeline. My analysis must focus on the immediate barriers to reopening and the likelihood of those barriers being removed in the next seven days.

Reasoning Rationale

1. Current Status is Far from Resolution: As of April 23, 2026, the Strait of Hormuz is “severely restricted.” Traffic is approximately 5-10% of its normal volume, with reports indicating that no international LNG carriers are transiting. Recent updates confirm continued military activity, including ship seizures and attacks, with the UK’s maritime authority rating the risk as “critical.” The current situation is the opposite of the resolution criteria, which requires the strait to be “no longer halted or severely restricted” for “all international maritime LNG traffic.”
2. Extremely Short Timeline: The resolution deadline is May 1, 2026, leaving only seven full days for a complete reversal of the current military and political situation. Such a rapid de-escalation during an active war is highly improbable. The base rate for resolving major geopolitical conflicts and restoring full commercial operations in a contested strait within one week is exceedingly low.
3. Failed Reopening and Lack of Trust: A critical event was the failed reopening attempt around April 17-18. Iran announced a “full opening,” but this was revoked within 24-48 hours amid reports of gunfire and a refusal by the US to lift its blockade. This “head fake” has destroyed trust. Even if a new political agreement were announced, shipping companies and their insurers would likely wait for a period of demonstrated, sustained safety before resuming transit, a process that would almost certainly take longer than the seven days remaining.
4. Hardening Political Stances: The primary driver of the closure is the ongoing war. Recent diplomatic signals are negative. An Iranian negotiator was quoted on April 23 stating that a reopening is “not possible” due to alleged US ceasefire breaches. This indicates that the political will for a swift reopening is absent and that the strait is being used as a point of leverage in the conflict.
5. Logistical and Physical Barriers: Beyond any political agreement, significant logistical hurdles remain. These include the high cost of war risk insurance (reportedly 6.7 times normal levels), the physical danger from potential naval mines (which the Pentagon estimated could take six months to clear), and active interference with vessel navigation. It is implausible that these risks could be neutralized and certified as safe for all traffic, particularly high-value LNG carriers, before May 1.

Key Assumptions & Probabilities of Failure:

• Assumption 1: There will be no sudden, durable ceasefire and security agreement between Iran and the US/allies that is implemented in the next seven days.
  • Probability of this assumption being incorrect: Very low, estimated at <5%. The current trajectory is one of continued conflict, not imminent resolution.
• Assumption 2: Even if a political deal were announced, shipping and insurance companies would not immediately resume full LNG traffic due to the “trust deficit” from the April 18 reversal and ongoing physical risks.
  • Probability of this assumption being incorrect: Extremely low, estimated at <2%. Standard risk management practices would prevent an immediate return to normal operations in a volatile war zone.

Conclusion:

Given the active conflict, the failed reopening attempt, the hardening political rhetoric, and the significant logistical barriers, the probability of the Strait of Hormuz reopening to all international LNG traffic in a “not severely restricted” manner within the next seven days is extremely low. The event would require an extraordinary and improbable sequence of positive political, military, and commercial developments.

Probability: 3%

=== Forecast Result ===

{
“probability_yes”: 0.05,
“probability_yes_per_category”: null,
“continuous_cdf”: null
}

=== Reasoning ===
This is a binary outcome question with a very short timeline. My analysis must focus on the immediate barriers to reopening and the likelihood of those barriers being removed in the next seven days.

Reasoning Rationale

1. Current Status is Far from Resolution: As of April 23, 2026, the Strait of Hormuz is “severely restricted.” Traffic is approximately 5-10% of its normal volume, with reports indicating that no international LNG carriers are transiting. Recent updates confirm continued military activity, including ship seizures and attacks, with the UK’s maritime authority rating the risk as “critical.” The current situation is the opposite of the resolution criteria, which requires the strait to be “no longer halted or severely restricted” for “all international maritime LNG traffic.”
2. Extremely Short Timeline: The resolution deadline is May 1, 2026, leaving only seven full days for a complete reversal of the current military and political situation. Such a rapid de-escalation during an active war is highly improbable. The base rate for resolving major geopolitical conflicts and restoring full commercial operations in a contested strait within one week is exceedingly low.
3. Failed Reopening and Lack of Trust: A critical event was the failed reopening attempt around April 17-18. Iran announced a “full opening,” but this was revoked within 24-48 hours amid reports of gunfire and a refusal by the US to lift its blockade. This “head fake” has destroyed trust. Even if a new political agreement were announced, shipping companies and their insurers would likely wait for a period of demonstrated, sustained safety before resuming transit, a process that would almost certainly take longer than the seven days remaining.
4. Hardening Political Stances: The primary driver of the closure is the ongoing war. Recent diplomatic signals are negative. An Iranian negotiator was quoted on April 23 stating that a reopening is “not possible” due to alleged US ceasefire breaches. This indicates that the political will for a swift reopening is absent and that the strait is being used as a point of leverage in the conflict.
5. Logistical and Physical Barriers: Beyond any political agreement, significant logistical hurdles remain. These include the high cost of war risk insurance (reportedly 6.7 times normal levels), the physical danger from potential naval mines (which the Pentagon estimated could take six months to clear), and active interference with vessel navigation. It is implausible that these risks could be neutralized and certified as safe for all traffic, particularly high-value LNG carriers, before May 1.

Key Assumptions & Probabilities of Failure:

• Assumption 1: There will be no sudden, durable ceasefire and security agreement between Iran and the US/allies that is implemented in the next seven days.
  • Probability of this assumption being incorrect: Very low, estimated at <5%. The current trajectory is one of continued conflict, not imminent resolution.
• Assumption 2: Even if a political deal were announced, shipping and insurance companies would not immediately resume full LNG traffic due to the “trust deficit” from the April 18 reversal and ongoing physical risks.
  • Probability of this assumption being incorrect: Extremely low, estimated at <2%. Standard risk management practices would prevent an immediate return to normal operations in a volatile war zone.

Conclusion:

Given the active conflict, the failed reopening attempt, the hardening political rhetoric, and the significant logistical barriers, the probability of the Strait of Hormuz reopening to all international LNG traffic in a “not severely restricted” manner within the next seven days is extremely low. The event would require an extraordinary and improbable sequence of positive political, military, and commercial developments.

Probability: 3%

End