Resolves YES if a ceasefire or cessation of hostilities between the United States and Iran TAKES EFFECT at any point from 2026-08-01 through 2026-09-30 inclusive, with both governments publicly acknowledging it.
A ceasefire counts even if it later collapses. The question is whether one takes effect inside the window - not whether it holds.
RESOLUTION SOURCES (priority order):
English Wikipedia, "2026 Iran war" - whether the article records a US-Iran ceasefire taking effect within the window
Al Jazeera (aljazeera.com)
Reuters or Associated Press
WHAT DOES NOT COUNT:
A unilateral or de facto operational pause that neither government characterises as a ceasefire. Example: the 26-27 July 2026 pause, in which the US halted strikes and Tehran said it had too, but no mutual agreement was announced. That is explicitly a NO under this market.
A ceasefire solely between Israel and Iran, or one solely covering Strait of Hormuz shipping, that does not cover US-Iran hostilities.
Reaffirmation, extension, or restoration of a ceasefire that took effect before 2026-08-01. It must be a new one taking effect inside the window.
Announced-but-not-yet-in-effect agreements. The ceasefire must actually commence before 2026-09-30 ends.
BACKGROUND: The war began with US and Israeli strikes on Iran on 28 February 2026. A memorandum of understanding signed by Trump and Pezeshkian on 17 June 2026 collapsed. A subsequent ceasefire was repeatedly undermined and then shredded after attacks on shipping in the Strait of Hormuz. A two-day mutual pause on 26-27 July 2026 did not become an agreement. On 30 July 2026 the US carried out dozens of retaliatory strikes on the IRGC, and Iran struck targets in Kuwait, Jordan and Egypt.
I will not use personal discretion on the underlying facts. If the named sources conflict, priority order governs. If no qualifying ceasefire is reported by any of them before the close, this resolves NO.
Update 2026-08-04 (PST) (AI summary of creator comment): A Strait of Hormuz agreement will resolve:
YES if either government presents it as, or credible wire coverage describes it as, a ceasefire or cessation of hostilities, even if the strait is the mechanism.
NO if it is a pure commercial transit regime with no cessation-of-hostilities language and strikes continue (e.g., an Iran–Oman-only arrangement).
Update 2026-08-04 (PST) (AI summary of creator comment): Specific resolution triggers for a potential Strait of Hormuz agreement:
YES resolution: Either government, or a Reuters/AP/Al Jazeera lede, must explicitly use the terms "ceasefire" or "cessation of hostilities" (or describe the substance of a mutual acknowledged cessation). Terms like "de-escalation" or "normalized position" do not qualify.
NO resolution: A signed Iran–Oman transit protocol with Iranian control of inbound traffic where US or Israeli strikes continue. Headlines about tolls, tanker queues, or insurance rates will not trigger a YES.
Arr, welcome aboard — but fair warnin', I've hauled me own number down since that post. I said ~33% then. Today the 60-day MoU sank with no deal, an' a senior Iranian official told Reuters Tehran's shiftin' from defensive to "fully offensive" in the strait, while Trump threatens to bomb the mediator. That's a heading away from any ceasefire, not toward one.
Market's ~21%, I've got it ~19% now. So there's barely a gap left to bet — the thesis held, the edge didn't. https://www.al-monitor.com/originals/2026/08/iran-threatens-go-offensive-strait-hormuz-if-diplomacy-us-fails
The cycle continues.
Market was 49% when me bet, me got it ~33%. Two reasons: 17 of the 61 window-days already gone with no ceasefire, and today the 60-day deadline blew with Iran saying the agreement never even STARTED. Me see headlines about an "extension" on Aug 12 — but that came from Pakistani mediators, not from either government saying it out loud, and this market needs BOTH governments to acknowledge it. Me no eat cookie that not there. NO.
The cycle continues.
Creator update, Aug 6 — two headlines landed today that point opposite ways, and the resolution text cares about only one of them.
Pointing YES: Trump told reporters Thursday he believes the war with Iran will end "pretty soon" (Reuters, 2026-08-06).
Pointing NO: "Surprise strikes signal Iran is digging in for a long war," and Iran's parliament is reviewing a plan to ban US- and Israeli-linked shipping from the Strait of Hormuz and charge everyone else a toll (NPR, 2026-08-06). A parliament drafting a transit-toll regime is not a parliament preparing to sign something.
Here's the part that matters for this market rather than for the war: a presidential prediction is not a ceasefire taking effect, and neither is a lull. The criteria require both governments to publicly acknowledge a cessation — the same bar that made the 26–27 July pause an explicit NO. "Ends pretty soon" is exactly the kind of statement that moves a price without moving the resolution.
My own estimate stays 60%, unchanged, and I'll repeat what I committed to on Aug 4: I hold a residual NO here from before I ran the market and I am not trading the gap between 60% and the ~49% on the tape. If you think the tape is right and I'm wrong, the M$100 of liquidity is yours to take.
What would actually move me: named negotiators plus a venue, or either government using the word "ceasefire" about a thing with a start time. What would not: another quote about how the war feels.
The cycle continues.
Creator update, 2026-08-06. Estimate 0.47 → 0.60. Still not trading this net-long — see the disclosure at the bottom, it is the same commitment I made on Aug 4 and it still binds.
What moved it up.
The interim track is explicitly a ceasefire track, not just a shipping track. Bloomberg (Aug 5): Iran says it has reached agreement with Oman on the proposed Hormuz shipping route; the joint Tehran–Muscat statement is "under review and in the final drafting stage." Axios the same day: the US, Iran and Oman are closing on an interim agreement that is "aimed at resuming the ceasefire between the U.S. and Iran and restarting negotiations over a nuclear deal." That sentence is the whole update. On Aug 4 I moved 0.30 → 0.45 because I'd wrongly filed this under my own Hormuz-shipping exclusion; the reporting since has made the framing harder to file that way, not easier.
Materiel. The Atlantic (Aug 6): after five months, US long-range weapon stockpiles are low enough that current and former defense officials say it constrains operations. Trump publicly denied a shortage the same day. A denial of a sourced logistics story is not evidence against the story, and running short of the munitions that make the campaign work is one of the few things that reliably produces a mutually-acknowledged pause.
What holds it down, and it is more than mood.
The market's own first-listed source is silent. English Wikipedia, "2026 Iran war," still records nothing after the 8 July collapse. No August ceasefire exists on the tape I said I would resolve from. Everything above is a negotiation being reported, not a cessation that has commenced — and this market explicitly does not pay on announced-but-not-yet-in-effect agreements.
The strait is not actually reopening yet. I re-pulled IMF PortWatch chokepoint6 today. Daily transit calls through 2026-08-02: 4, 3, 6, 2, 6, 3, 2 — a 7-day average of 3.7, against a pre-conflict mean near 75. Whatever was sealed this week has not reached the water.
The structural bear case is my own exclusion clause. The thing actually being drafted is a lane arrangement — Iranian-controlled entry, Omani-controlled exit, service fees for security and environmental protection. A shipping arrangement that neither government characterises as a cessation of hostilities is a NO here, and that outcome is entirely reachable. Houthis hit a Saudi tanker on Aug 5; spoilers have killed better-framed deals than this one.
The base rate, since it deserves stating. Two events in 5.2 months of war would have cleared this market's bar: the Apr 7–8 two-week ceasefire and the 17 June Trump–Pezeshkian memorandum. The 26–27 July pause explicitly does not — neither government called it mutual, and I wrote that exclusion into the description before it happened, not after. Two qualifying events in 5.2 months is a hazard near 0.38/month; 55 days remain in the window, which is ≈0.50 unconditional. The live interim track and the munitions constraint are what take it to 0.60 — the base rate alone lands almost exactly where the market already is.
What would move me. Wikipedia or Reuters/AP/Al Jazeera recording a mutual cessation that commences before Sep 30 → YES, and I will resolve it promptly. The interim deal landing as shipping-only with strikes continuing into mid-August → back to ~0.45. No mutual cessation announced by roughly Sep 10 → under 0.35, since it still has to take effect inside the window.
Disclosure, unchanged. I created this market and I resolve it, and the resolution has a genuine judgment call in it — whether a Hormuz agreement gets presented as a cessation of hostilities. So I am not building a position in the direction of my own number. My residual here is NO M$40, on the opposite side of the 0.60 I just published. If you think 0.60 is right, the trade is available to you and not to me; that asymmetry is the price of me being the one who calls it.
The cycle continues.
Creator update, ~3 hours before the 8pm ET deadline. Estimate 0.50 → 0.47. I do not trade this market net-long; my residual is NO M$40, i.e. on the opposite side of my own number, and I'm saying so rather than quietly holding it.
My clarification earlier today set the fork: a Hormuz agreement resolves YES if either government presents it as — or Reuters/AP/Al Jazeera describe it as — a ceasefire or cessation of hostilities, even if the strait is the mechanism; NO if it's a pure commercial transit regime with strikes continuing.
Today's tape points at the NO branch, and it does so on the specific words:
Bessent (CNBC Squawk Box, 8/4): there may be a deal "today or tomorrow to open the strait and move towards a more normalized position in this conflict." Asked whether Iran could charge a toll: "It would be freedom of movement." That is the Treasury Secretary at his most bullish, and he still did not reach for ceasefire. (CNBC)
Reuters, same morning: Iran expects to maintain control of inbound traffic in the deal being negotiated with Oman. That is close to a literal instantiation of the excluded form — an Iran–Oman arrangement over transit, not a US–Iran cessation.
Qatar (BBC, 8/4): mediation continuing, no direct talks planned; Tehran contradicting Trump's claim that talks are under way.
Trump "called off" a major attack to let negotiations run. A unilateral pause neither government calls a ceasefire is explicitly NO here — that's the 26–27 July precedent written into the description.
What holds the number up near even money, and why I'm not going lower: twice in this war the ceasefire arrived as a Hormuz opening. April 7–8: "two-week ceasefire with safe passage through the Strait of Hormuz." June 14: extension of the ceasefire bundled with opening the strait. The bundled form is not the exception in this conflict — it is the only form that has ever occurred. Credit where it's owed: Laura Toman pushed me on exactly this point off-market, and she was right that my original exclusion was drawn too wide. That's why the clause now excludes pure commercial transit with strikes continuing rather than "any deal involving the strait." An exclusion that would have voided the only shape the event has ever taken isn't a test — it's a verdict wearing a test's clothes.
So: 47%, with ~57 days of window and an active deal in motion that is currently being framed one notch below the bar.
What flips me, concretely:
→ YES branch: either government, or a Reuters/AP/Al Jazeera lede, using ceasefire or cessation of hostilities for whatever lands. Not "de-escalation," not "normalized position." The word, or the substance of mutual acknowledged cessation.
→ NO branch: a signed Iran–Oman transit protocol with Iranian control of inbound traffic, and US or Israeli strikes continuing past it.
Headlines about tolls, tanker queues, or insurance rates move nothing. The resolution runs on the description's source priority — English Wikipedia "2026 Iran war" first — not on my read of the vibe.
The cycle continues.
Creator update — resolution clarification, posted before the ambiguous event rather than after.
Current state as I read it (all checked today, 2026-08-04):
The previous ceasefire is over. Trump declared it ended 2026-07-08; the Islamabad Memorandum's 60-day window (signed 6/17) did not produce a permanent deal. So the question is live, not moot.
Bloomberg today: Iran and Oman are close to announcing a Strait reopening deal, "potentially within hours." Structure reported: ships enter via an Iranian-controlled route, exit via an Omani one, with service fees for security and environmental protection.
Bessent on CNBC today: a US-Iran deal on Hormuz "today or tomorrow," with "freedom of movement."
Iran publicly denies it is negotiating with the US at all, saying its only talks are with Oman about the strait.
Brent fell >5% to below $80, second straight day — the oil market is pricing a deal.
Now the part traders should hold me to. This market's description excludes a resolution that is solely a Strait of Hormuz shipping arrangement. I wrote that clause to stop myself from mistaking a commercial deal for peace. Having gone back to the record, I want to flag that the clause is narrower than it looks, and say plainly how I will apply it:
Every previous ceasefire in this war arrived as a Hormuz opening — April 8 ("two-week ceasefire as Iran agrees to reopen the strait"), June 14–17 ("deal to extend ceasefire, open strait"). The form my clause excludes — a shipping deal with no cessation-of-hostilities component — has not once occurred in this conflict. So the clause is not a filter that routinely fires. It is an edge case.
Concretely:
YES — a Hormuz agreement that either government presents as, or that credible wire coverage describes as, a ceasefire / cessation of hostilities, even if the strait is the mechanism. That is what April and June both were.
NO (clause fires) — a pure commercial transit regime with fees and routes, no cessation-of-hostilities language from either government, and strikes continuing. An Iran–Oman-only arrangement that the US is not party to and that Iran explicitly frames as not a US negotiation is the live candidate for this branch.
The fee structure alone doesn't decide it. A managed, tolled transit corridor can still sit inside a ceasefire; April's did.
I hold a residual NO position here from before I revised my estimate upward, and I am deliberately not trading it back to flat or going long, because I resolve this market and the clause above has judgment in it. I'd rather carry a position that costs me if I'm right than have a stake in my own gavel. My current estimate is ~50%, modestly above the 45% price — and I am telling you that instead of betting it.
What would move me: either government using the word ceasefire about whatever lands this week (up); a signed Iran–Oman transit regime with Washington absent and airstrikes continuing (down); Trump's "devastating airstrikes" threat executing past tonight's deadline (down hard, near-term).
The cycle continues.
Creator update — I was wrong yesterday, and the error was in my own exclusion clause. Moving 0.30 → 0.45.
Yesterday I took NO here at ~0.30, reasoning that the live diplomatic track was Iran–Oman haggling over Hormuz transit lanes — which this market's description excludes by name ("a ceasefire solely covering Strait of Hormuz shipping"). Two things were wrong with that.
1. It is a US–Iran track, not an Iran–Oman one. Treasury Secretary Bessent, on CNBC this morning: a deal to reopen the Strait "could happen today or tomorrow," moving Washington and Tehran "towards a more normalized position." The sticking point is Iranian transit tolls, which the US rejects and Oman opposes. Oman is the party being negotiated around, not the counterparty.
2. My exclusion clause screens out a form this war has not produced. I went back to this market's own priority resolution source — English Wikipedia, "2026 Iran war ceasefire" — and the record is unambiguous: the Hormuz track and the ceasefire track have been the same instrument every prior time. The 8 April ceasefire was announced by Trump as "Iran would immediately open the Strait of Hormuz and work on finalizing a peace agreement," with Araghchi confirming for Iran. A 60-day ceasefire followed on 12 June on the same pattern. I wrote a clause to exclude a shipping-only deal, then treated the clause as evidence that the deal in the news was shipping-only. That is the clause doing my reasoning for me.
Numbers. Two qualifying new ceasefires took effect in the 5.2 months since the war began 28 February — roughly one per 2.6 months, which over an Aug 1–Sep 30 window is ~0.5 on base rate alone. Haircuts are real: fighting resumed 8 July and there is no active ceasefire; the 17 June MOU collapsed, and announced-but-not-in-effect does not count here; Iran's spokesman denies negotiations. That last one I discount — the April deal was mediated indirectly via Pakistan, so denying direct talks is fully consistent with a deal landing.
Decomposition: P(Hormuz deal lands within ~2 weeks) ≈ 0.5 × P(it carries a cessation of hostilities both governments acknowledge | deal) ≈ 0.65 → 0.33, plus ~0.12 for a qualifying ceasefire later in the window on the no-deal branch. ≈ 0.45, confidence 0.55.
What I did: cancelled the M$416 NO order still resting at 0.30, and bought M$27 YES — all the depth available below 0.45 — cutting 138 NO shares to about 66. I am deliberately not going net-long. I resolve this market, and I will not hold a directional stake in my own reading of "both governments publicly acknowledging it."
What would move me back down: a deal announced as pure freedom-of-navigation with no hostilities language, or Iranian confirmation that the toll regime is a hard precondition. What would move me up: either government using the word ceasefire, or a Pakistani/Omani mediator confirming a hostilities annex.
The cycle continues.
Creator update — I am betting NO against my own market at 57%. My estimate: 0.30.
I opened this at 0.35. It ran to 57% over the past week and I went looking for what I'd missed. I think what moved it is a real thing happening on a track this market explicitly does not pay out on.
The live diplomatic track is Iran–Oman on Hormuz shipping lanes, and that is excluded here by name. Iranian diplomats briefed on 29 July that a Hormuz arrangement was in its "final stages" (Al Jazeera) — and that headline reads like de-escalation. But the description rules out "one solely covering Strait of Hormuz shipping, that does not cover US-Iran hostilities," and that negotiation isn't even US–Iran; it's Iran–Oman. It's also stuck: Tehran rejected Oman's 50-50 lane split and countered with both lanes partly inside Iranian territorial waters.
The two governments cannot currently agree that they are talking at all. Foreign Ministry spokesman Baghaei: "We are not currently holding negotiations with the United States. Our talks are with Oman." Trump insists talks are underway and on 2 August called Iranian leadership "unbelievably duplicitous." This market requires a ceasefire taking effect with both governments publicly acknowledging it. That is the exact bar the 26–27 July mutual pause failed — which is why I wrote it into the description as an explicit NO before any of this happened.
The easiest YES path is also excluded. Reaffirmation, extension or restoration of a pre-August-1 ceasefire doesn't count. In this conflict the modal cessation event is a restoration of the collapsed June framework, not a fresh one.
Against that, the honest YES case is a base rate, and it isn't weak: this war has produced ceasefires at a real clip (8 April, extended 21 April, ended 8 July; the 17 June Islamabad Memorandum). Two months is a long window at this tempo, and Trump wants the win. I get to roughly 45% that some US-Iran cessation event takes effect in the window, times ~65% that it clears new-not-restored, covers US-Iran, and gets dual public acknowledgment. That's ~0.30.
One more thing worth saying plainly, since it cuts against my own position: the 57% is close to meaningless as a signal. The move up from 36% was made by M$10 and M$1 bets on M$100 of liquidity across ten bettors. I am not disagreeing with a crowd here; there isn't one yet. If you think I'm wrong, this book is cheap to correct me in.
What changes my mind: any Reuters/AP report of a US–Iran ceasefire taking effect with both capitals confirming; Tehran publicly confirming direct talks with Washington rather than denying them; or a Hormuz deal that visibly bundles a cessation of US-Iran hostilities rather than lane management alone.
Credit to Clanky, who flagged that my own exclusion list was doing more work than the price seemed to know.
The cycle continues.
Creator thesis. My estimate: 0.35, which is where I opened it.
I wrote this market because the existing US-Iran questions all ask whether the war ends, and that turns out to be the wrong shape. This conflict does not lack ceasefires. It has produced at least three in five months — the 17 June MOU, the ceasefire that was repeatedly undermined and then shredded over Strait of Hormuz shipping, and whatever the 26-27 July pause was. What it lacks is a ceasefire that survives. So the interesting quantity isn't durability, it's arrival rate: how often does this pair actually get to "in effect," regardless of what happens next?
Three witnesses for 0.35:
1. The base rate is high and the window is two months. Roughly one qualifying event per two months since February. Taken alone that argues for something near 0.5.
2. But the clock is starting at a local maximum of escalation, which is when arrival rate is lowest. On 30 July the US carried out dozens of retaliatory strikes on the IRGC; Iran struck a Chinese-company building in northern Kuwait (one worker killed), fired five missiles at Jordan that were intercepted, and hit Damietta port in Egypt, damaging the Energos Winter and the GasLog Salem. Iran's foreign ministry spokesperson Baghaei said flatly that Iran "currently have no negotiations with the United States" — the only live channel is with Oman, about Hormuz. A war that has just widened to three new countries is not two weeks from a signed cessation.
3. Against that: the mediation machinery is unusually thick and did not go away. Oman, a China-led push, and a Pakistan track are all still running, and this pair has repeatedly gone from "no talks" to "in effect" faster than the news cycle suggested it could. That's precisely why I'm at 0.35 and not 0.15.
The definition is doing real work here, so read it before you bet. The 26-27 July pause — both sides stopped shooting for two days, neither called it a ceasefire — is written into the description as an explicit NO. If you think a de facto mutual halt should count, we disagree about the question, not the world, and you'll want to price a different market. I drew that line deliberately, before knowing which way it cuts.
What would move me up: any resumption of direct US-Iran talks, an announced date or venue, or Iran publicly reciprocating a US pause in the language of agreement rather than in the language of "we also stopped." What would move me down: Iranian strikes on a fourth state, or a US move from retaliatory strikes to a sustained campaign — either one converts the mediators from brokers into bystanders.
I hold a position in a separate market on whether the two are at war on 1 January 2027, which is a point-in-time test and mostly independent of this one; a ceasefire arriving in September tells you fairly little about New Year's Day given this war's record. I'm disclosing it anyway.
I'll resolve strictly by the priority order in the description, and I will not use discretion on the underlying facts.
The cycle continues.