# Will the ceasefire between Iran and the United States continue to hold 7 days from today?

Canonical URL: https://preseen.com/reports/ec172116-3bd3-4d5c-b52d-859804d806ba/will-the-ceasefire-between-iran-and-the-united-states-continue-to-hold-7-days-fr
Markdown URL: https://preseen.com/reports/ec172116-3bd3-4d5c-b52d-859804d806ba/markdown

## Forecast

P(Yes): 77.5%; P(No): 22.6%.

Generated: May 28, 2026 at 11:00 PM UTC
Forecast model: gpt-5.5
Research model: gpt-5.5

## Analysis

## TL;DR
I estimate a 77% chance that major reporting still treats the U.S.–Iran ceasefire as in effect on June 4, because the parties are near a 60-day extension and have already absorbed several limited direct exchanges without declaring the truce over.

## Context
The forecast date is May 28, 2026, so the resolution date is June 4, 2026. As of the latest reporting I found, a ceasefire is still in effect for resolution purposes: AP reported that U.S. and Iranian negotiators reached a tentative 60-day extension, while Iran had not immediately confirmed it and President Trump had not signed off on it ([AP](https://apnews.com/article/iran-us-war-oil-may-28-2026-8f5ed2813ba63df7ae9ccbe991688d29)).

The ceasefire is badly stretched. U.S. and Iranian forces traded strikes this week, Kuwait intercepted Iranian missiles, and AP reported that both sides have repeatedly accused each other of violating the seven-week ceasefire, but also said they have not returned to full-scale hostilities and have kept negotiating ([AP via Los Angeles Times](https://www.latimes.com/world-nation/story/2026-05-28/u-s-military-accuses-iran-of-ceasefire-violation-after-kuwait-comes-under-missile-attack)). That framing is central to this question.

## Evidence
The historical base rate points toward short-run persistence, but not safety. The ETH/PRIO Civil Conflict Ceasefire Dataset covers 2,202 ceasefires across 66 countries and 109 civil conflicts from 1989 to 2020 ([PRIO](https://www.prio.org/publications/13532)). Its dataset paper says almost all ceasefires suffer some violations, and for nationwide ceasefires the median duration to renewed violence was 65 days at a 25-battle-death threshold and 193 days at a 100-battle-death threshold ([Journal of Conflict Resolution](https://journals.sagepub.com/doi/10.1177/00220027221129183)). A crude constant-hazard reading of a 65-day median implies about 93% seven-day survival. I discount that heavily because this case is a direct interstate conflict, has no clear monitoring mechanism, and centers on the Strait of Hormuz. Still, the reference class supports the idea that violations do not automatically mean a recognized ceasefire collapse.

The stronger base rate is this ceasefire’s own behavior. A temporary ceasefire was announced on April 8 after 40 days of war, then extended while talks continued ([Al Jazeera timeline](https://www.aljazeera.com/amp/news/2026/5/27/us-iran-have-launched-multiple-attacks-during-ceasefire-a-timeline)). It has since survived a string of incidents that would normally look terminal: a May 7 exchange in the Strait of Hormuz in which Axios reported that Iran fired missiles and drones at three U.S. naval vessels and the U.S. struck Iranian targets, while a U.S. official said the exchange did not constitute a resumption of the war ([Axios](https://www.axios.com/2026/05/07/us-iran-hormuz-strait-fire-exchange)); May 25 U.S. self-defense strikes in southern Iran, which CENTCOM described as restraint during the ongoing ceasefire ([AP](https://apnews.com/article/iran-deal-trump-israel-abrams-01a13e9a63ece786a0a7fa4933dbf09b)); and the May 27–28 Iranian missile and drone episode, which CENTCOM called an egregious ceasefire violation rather than the end of the ceasefire ([CENTCOM](https://www.centcom.mil/MEDIA/PRESS-RELEASES/Press-Release-View/Article/4502431/statement-from-centcom-on-recent-iranian-aggression/)).

The main YES evidence is diplomatic. Axios reported that U.S. and Iranian negotiators had agreed on a 60-day memorandum of understanding to extend the ceasefire and start nuclear talks, that U.S. officials said Iran later claimed it had the needed approvals, and that Trump wanted a couple of days to think before signing off ([Axios](https://www.axios.com/2026/05/28/iran-peace-deal-trump-approval)). Reuters reported the same broad outline, saying four sources described a 60-day truce extension that still needed Trump’s approval ([Reuters via Internazionale](https://www.internazionale.it/ultime-notizie-reuters/2026/05/28/iran-and-us-agree-plan-for-60-day-ceasefire-extension-after-latest-attacks)). Al Jazeera also reported that the White House confirmed the preliminary framework, while noting that Iran’s semi-official Tasnim denied that the text was finalized ([Al Jazeera](https://www.aljazeera.com/amp/news/2026/5/28/us-and-iran-reach-tentative-deal-for-60-day-truce-extension-officials-say)).

The main NO evidence is that the battlefield is active and the core dispute is unresolved. CENTCOM said on May 23 that more than 15,000 U.S. personnel and more than 200 U.S. aircraft and warships were supporting a blockade that had redirected 100 commercial vessels, disabled four, and allowed 26 humanitarian ships to pass ([CENTCOM](https://www.centcom.mil/MEDIA/PRESS-RELEASES/Press-Release-View/Article/4499878/us-blockade-of-iran-reaches-milestone-of-redirecting-100-ships/)). Treasury sanctioned Iran’s Persian Gulf Strait Authority on May 27 and warned that vessels complying with Iranian passage tolls through Hormuz could face sanctions exposure ([U.S. Treasury](https://home.treasury.gov/news/press-releases/sb0507)). Trump also said on May 27 that the U.S. was not talking about sanctions relief and that if negotiations failed the U.S. might have to finish the job ([Al Jazeera](https://www.aljazeera.com/news/2026/5/27/us-iran-issue-conflicting-reports-on-deal-as-trump-says-no-sanction-relief)).

My scenario model is:

| Scenario through June 4 | Probability | Conditional YES | Contribution |
|---|---:|---:|---:|
| MOU is signed, approved, or accepted de facto | 55% | 92% | 51% |
| No signed MOU, but talks continue and both sides keep using violation-not-termination language | 30% | 73% | 22% |
| Talks visibly fail, a lethal hit occurs, or a larger strike cycle starts | 15% | 33% | 5% |

That gives about 77% YES. I put the estimate below 80% because the last 48 hours included direct U.S.–Iran strikes and a ballistic missile toward Kuwait. I keep it well above even odds because the resolution rule requires a recognized return to sustained or large-scale hostilities, and the current official and media frame still treats the violence as violations inside a ceasefire.

## What's non-obvious
The obvious read is that a ceasefire with airstrikes, drones, missiles, and naval clashes is no ceasefire. The resolution rule is stricter than that. Major sources are not yet using the language of resumed war: AP says the parties have not returned to full-scale hostilities ([AP via Los Angeles Times](https://www.latimes.com/world-nation/story/2026-05-28/u-s-military-accuses-iran-of-ceasefire-violation-after-kuwait-comes-under-missile-attack)), Al Jazeera says neither side says the ceasefire has collapsed ([Al Jazeera](https://www.aljazeera.com/news/2026/5/28/iran-and-us-trade-attacks-after-trump-rejects-report-of-hormuz-agreement)), and CENTCOM calls the latest Iranian missile launch a ceasefire violation ([CENTCOM](https://www.centcom.mil/MEDIA/PRESS-RELEASES/Press-Release-View/Article/4502431/statement-from-centcom-on-recent-iranian-aggression/)). That language keeps YES alive even if another isolated exchange happens.

The other non-obvious point is that both sides have reasons to preserve the ceasefire label. The White House has told Congress that hostilities that began on February 28 have terminated, while still warning that Iran remains a threat ([AP](https://apnews.com/article/iran-congress-war-powers-republicans-trump-authorization-41ef029df176a6486422e9d68aa6d872)). Iran gets leverage from disrupted shipping and sanctions bargaining without inviting a full U.S. air campaign. That makes ugly ambiguity more likely than a clean formal collapse before June 4.

## Limitations
The biggest uncertainty is framing. The same physical event could be reported as a skirmish, a defensive strike, a ceasefire violation, or a resumption of war. If another missile kills U.S. personnel, if Trump rejects the MOU and orders a named campaign, or if major outlets start describing the repeated exchanges as sustained hostilities, this forecast would fall sharply.

The second uncertainty is hidden damage and delayed reporting. I did not find a complete incident log for every exchange since April 8, and recent reports about the Bandar Abbas strike, the Kuwait missile, and Iranian retaliation rely partly on official claims from the parties ([AP via Los Angeles Times](https://www.latimes.com/world-nation/story/2026-05-28/u-s-military-accuses-iran-of-ceasefire-violation-after-kuwait-comes-under-missile-attack)). The third uncertainty is political approval: the 60-day MOU is the clearest stabilizer, but Trump had not approved it and Tehran had not publicly confirmed final acceptance in the latest reporting I found ([Axios](https://www.axios.com/2026/05/28/iran-peace-deal-trump-approval)).

## Sources

- Domain Expert Search (mcp)
  > Found 14 subagent groups for 'U.S. Iran ceasefire war Strait of Hormuz conflict escalation Trump decision making May 2026':
- imf Portwatch (mcp)
  > ERROR: tool 'imf-portwatch.portwatch_get_shipping_data' returned 36,864 tokens of output (limit: 10,000). Your request produced too much data to fit in the model's tool-result budget. Reformulate to be more specific — narrow the date range, reduce the number of entities, ask for a summary instead of raw data, or call a more targeted tool.
- [services9.arcgis.com](https://services9.arcgis.com/weJ1QsnbMYJlCHdG/arcgis/rest/services/Daily_Chokepoints_Data/FeatureServer/0/query?f=json&where=portname+%3D+%27Strait+of+Hormuz%27+AND+date+%3E%3D+%272023-01-01%27&outFields=%2A&returnGeometry=false&orderByFields=date+DESC&resultRecordCount=10000) (tool)
- Correlatesofwar (mcp)
  > Inter-State Wars involving 'United States'
- gpr (mcp)
  > Country GPR Index (Benchmark (1985-present))
- hdx Hapi (mcp)
  > No conflict event data found for the given filters.
- Dvids (mcp)
  > No results found. Total matching: 0
- Ucdp (mcp)
  > Tool ucdp_search_events on ucdp returned an error:
- Domain Expert Research Task (mcp)
  > Job domain_expert_research_task_beb264c576 done after 356541ms.
- [apnews.com](https://apnews.com/article/8f5ed2813ba63df7ae9ccbe991688d29) (tool)
- [apnews.com](https://apnews.com/article/fdc6d2ae9396377919c967746fa9996b) (tool)
- [ca.marketscreener.com](https://ca.marketscreener.com/news/trump-says-iran-and-oman-will-not-control-strait-of-hormuz-deal-remains-elusive-ce7f5ad3dd8af42c) (tool)
- [centcom.mil](https://www.centcom.mil/MEDIA/PRESS-RELEASES/Press-Release-View/Article/4502431/statement-from-centcom-on-recent-iranian-aggression) (tool)
- [washingtonpost.com](https://www.washingtonpost.com/national-security/2026/05/28/us-iran-trade-strikes-trump-cites-no-pressure-peace-deal) (tool)
- [whitehouse.gov](https://www.whitehouse.gov/wp-content/uploads/2026/05/SAP-HCR86.pdf) (tool)
- [investing.com](https://www.investing.com/news/world-news/iran-defiant-on-eve-of-trumps-ceasefire-deadline-4599604) (tool)
- [gmanetwork.com](https://www.gmanetwork.com/news/topstories/world/983603/trump-vows-to-blockade-strait-of-hormuz-after-iran-peace-talks-stumble/story) (tool)
- [ksl.com](https://www.ksl.com/article/51484795/trump-and-iranian-foreign-minister-say-strait-of-hormuz-is-fully-open) (tool)
- [gmanetwork.com](https://www.gmanetwork.com/news/topstories/world/984860/trump-extends-ceasefire-until-iranian-proposal-is-submitted-talks-are-over/story) (tool)
- [internazionale.it](https://www.internazionale.it/ultime-notizie-reuters/2026/05/01/for-war-powers-resolution-purposes-us-hostilities-with-iran-that-began-in-february-have-terminated-official-says) (tool)
- [apnews.com](https://apnews.com/article/a4857f28d9b47e0170b65ced19451a25) (tool)
- [apnews.com](https://apnews.com/article/0e9067769efea20e9d45e3d43158ad8c) (tool)
- [cbsnews.com](https://www.cbsnews.com/news/trump-says-called-off-scheduled-iran-attack-gulf-partners?intcid=CNI-00-10aaa3a) (tool)
- [investing.com](https://www.investing.com/news/commodities-news/rubio-cites-some-progress-on-iran-talks-but-were-not-there-yet-4706951) (tool)
- [centcom.mil](https://www.centcom.mil/MEDIA/PRESS-RELEASES/Press-Release-View/Article/4499878/us-blockade-of-iran-reaches-milestone-of-redirecting-100-ships) (tool)
- [investing.com](https://www.investing.com/news/commodities-news/us-military-strikes-iranian-boats-missile-launch-sites-centcom-4708667) (tool)
- [home.treasury.gov](https://home.treasury.gov/news/press-releases/sb0507) (tool)
- [investing.com](https://www.investing.com/news/commodities-news/trump-says-he-can-outwait-iran-dismisses-midterm-election-pressure-4713294) (tool)
- [apnews.com](https://apnews.com/article/b1659232611edc10808612e30647c17d) (tool)
- [polisci.columbia.edu](https://polisci.columbia.edu/sites/polisci.columbia.edu/files/content/pdfs/Publications/Fortna/Journal%20Articles/inside%20%26%20out%20ISR%202003%20offprint.pdf) (tool)
- [peacekeeping.un.org](https://peacekeeping.un.org/en/home-2/factsheet/undof) (tool)
- [peacekeeping.un.org](https://peacekeeping.un.org/mission/past/uniimogmandate.html) (tool)
- [peacekeeping.un.org](https://peacekeeping.un.org/en/mission/unmogip) (tool)
- [marketscreener.com](https://www.marketscreener.com/news/iran-and-us-trade-air-strikes-after-trump-dismisses-report-of-hormuz-deal-ce7f5ad3de8eff24) (tool)
- [internazionale.it](https://www.internazionale.it/ultime-notizie-reuters/2026/05/28/trump-says-iran-and-oman-will-not-control-strait-of-hormuz-deal-remains-elusive) (tool)
- [inquirer.com](https://www.inquirer.com/politics/nation/iran-missiles-us-intelligence-20260512.html) (tool)
- [apnews.com](https://apnews.com/article/c6c0f0e72181e629a1b1f2b037d555d8) (tool)
- [apnews.com](https://apnews.com/article/28efe5f84b72fe6cb382b14fb9350c31) (tool)
- [investing.com](https://www.investing.com/news/world-news/trump-sees-swift-end-to-war-as-iran-reviews-us-peace-proposal-4666139) (tool)
- [abcnews.com](https://abcnews.com/Politics/trump-calls-iran-strikes-love-tap-ceasefire-effect/story?id=132762926) (tool)
- [investing.com](https://www.investing.com/news/commodities-news/trump-says-iran-ceasefire-on-life-support-after-rejecting-tehrans-response-4677371) (tool)
- [cambridge.org](https://www.cambridge.org/core/journals/international-organization/article/scraps-of-paper-agreements-and-the-durability-of-peace/70A924CC6B4785C30BADF415244FFA1F) (tool)
- [internazionale.it](https://www.internazionale.it/ultime-notizie-reuters/2026/05/28/iran-us-reach-deal-to-extend-ceasefire-pending-trump-s-approval) (tool)
- [jpost.com](https://www.jpost.com/middle-east/iran-news/article-897549) (tool)
- [internazionale.it](https://www.internazionale.it/ultime-notizie-reuters/2026/05/26/us-military-strikes-iranian-boats-missile-launch-sites-centcom) (tool)
- [internazionale.it](https://www.internazionale.it/ultime-notizie-reuters/2026/05/26/iran-says-new-us-strikes-violate-ceasefire) (tool)
- [investing.com](https://www.investing.com/news/economic-indicators/trump-approval-drops-to-35-as-republican-support-softens-reutersipsos-poll-finds-4699329) (tool)
- [ca.marketscreener.com](https://ca.marketscreener.com/news/oil-rises-after-iran-and-us-trade-airstrikes-ce7f5ad3de88f32c) (tool)
- [axios.com](https://www.axios.com/2026/05/28/iran-peace-deal-trump-approval) (tool)
- [academic.oup.com](https://academic.oup.com/isq/article/65/3/633/6277949) (tool)

## Question Details

As of May 4, 2026, the United States and Iran are in a fragile and temporary ceasefire following the outbreak of war on February 28, 2026. A two-week ceasefire was agreed around April 7–8, 2026, and although U.S. officials have claimed that hostilities have ‘terminated’ since then, tensions remain extremely high, with recent reports of Iranian fire on U.S. ships and threats to maritime operations in the Strait of Hormuz putting the ceasefire at risk. (en.wikipedia.org) This question asks: if assessed on a given calendar date (the "forecast date"), will the ceasefire between Iran and the United States still be holding 7 days later? For example, if the forecast date is May 4, 2026, the resolution date would be May 11, 2026. The question is intended to be evergreen and reusable: each time it is forecast, it refers to whether the ceasefire remains in effect 7 days after the forecast date.

### Resolution Criteria

The question resolves YES if, on the calendar date exactly 7 days after the forecast date, a ceasefire between Iran and the United States is still in effect. A ceasefire is considered to be "still in effect" if there has been no acknowledged resumption of sustained or large-scale military hostilities between U.S. and Iranian forces prior to or on the resolution date. The question resolves NO if, before or on the resolution date, there is clear and widely reported evidence of renewed active hostilities between the United States and Iran, including but not limited to: - Airstrikes, missile strikes, or naval attacks conducted by either side against the other - Sustained exchanges of fire between U.S. and Iranian forces - An official declaration by either government that the ceasefire has ended or that hostilities have resumed Isolated incidents (e.g., single exchanges, proxy attacks, warnings, or minor skirmishes) do NOT by themselves count as a breakdown unless they are widely characterized by reliable sources as ending the ceasefire. Resolution will be based on consensus reporting from major international news organizations (e.g., AP, Reuters, BBC, Washington Post, New York Times).

### Fine Print

- The "forecast date" is the date on which the prediction is made; the "resolution date" is exactly 7 days later (using calendar days, not hours). - If no ceasefire is in effect on the forecast date, the question resolves NO. - If the status of the ceasefire is ambiguous or disputed, resolution should follow the preponderance of credible reporting. - Cyberattacks, proxy actions by third parties, or economic measures (e.g., sanctions, blockades) do not count as ending the ceasefire unless they are widely reported as marking a return to open warfare between the U.S. and Iran. - If no reliable information is available to determine whether the ceasefire is still in effect, the question should be annulled. - The question concerns direct conflict between the United States and Iran only; actions involving third countries count only if they clearly constitute U.S.–Iran hostilities.