Iran-US ‘End of War’ Market Sits at 2% on Manifold as the Peace Deadline Runs Out. A Manifold market asking whether Washington and Tehran will sign a formal end-of-war agreement by August 31, 2026 is trading at just a 2% implied probability of yes as of August 26, 2026, yet roughly 28% of its all-time volume changed hands in the last 24 hours. The surge in activity lines up with the collapse of the June 17 ceasefire framework, the expiry of a 60-day negotiating window on August 17, and public statements from both sides that no talks are scheduled.
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The Offbeat Market Everyone Is Suddenly Betting On
Prediction markets tend to see volume spikes for one of two reasons: fresh news, or an approaching resolution date. The Manifold market “Will the US and Iran sign a formal end-of-war agreement by August 31, 2026?” is now getting both at once. The question closes at the end of the month, and the diplomatic backdrop has deteriorated sharply in August. That combination pulled a large share of the market’s lifetime trading into a single day even as the price barely moved off the floor.
For a tech and finance audience, the interesting part is not whether the answer is yes. It is why a market can be this active while sitting at 2%. When a contract is priced near certainty, the remaining trades are usually deadline-driven positioning: participants locking in the near-certain outcome, closing hedges, or reacting to headlines that confirm the base case rather than overturn it. If you are new to how these instruments turn news into a number, see our explainer on how prediction markets work.
What the Market Is Actually Asking
The contract resolves yes only if the United States and Iran sign a formal, comprehensive agreement ending the war by August 31, 2026. That is a high bar, and it is deliberately narrower than the ceasefire paperwork that already exists. The two governments did sign a document earlier this summer, but it was explicitly an interim framework, not a final peace treaty.
That distinction matters for anyone reading the odds. A market titled around a “formal end-of-war agreement” is not asking whether fighting has paused. It is asking whether a durable, legally weighty settlement gets signed in a specific window. Understanding that gap between a ceasefire and a treaty is the whole game here.
The Odds and What 2% Implies
As of August 26, 2026, the Manifold market implies a 2% probability of yes. In plain terms, traders are collectively assigning a 98% chance that no formal end-of-war agreement gets signed before the month ends. For a primer on translating those percentages, our guide to implied probability walks through the math.
Manifold runs on play-money for most users, so the dollar stakes are not comparable to a regulated exchange. What the number still captures is aggregated expectation: a crowd of forecasters converging on near-certainty that the deadline passes without a signature. The 24-hour volume figure, about 28% of all the trading the market has ever seen, tells you attention spiked. The flat price tells you the news confirmed rather than challenged the consensus.
What Is Driving the Move
The catalyst is the breakdown of the June framework and a missed deadline. On June 17, 2026, the two sides signed what has become known as the Islamabad Memorandum, a memorandum of understanding brokered with heavy mediation from Pakistan. According to Al Jazeera, the deal was signed remotely, with President Donald Trump reportedly signing after the G7 while President Masoud Pezeshkian signed in Tehran. The full text published by NPR laid out a 14-point framework: an end to strikes, a toll-free reopening of the Strait of Hormuz for 60 days, an end to the US naval blockade of Iranian ports, the release of $24 billion in frozen Iranian assets (per Mehr News, relayed by Al Jazeera in June 2026), and a 60-day window to negotiate a wider peace deal. When the MoU was signed, ING’s commodity desk flagged that the promised Hormuz reopening alone was enough to trigger a brief oil price drop and inflation relief across import-dependent economies — a reaction that shows how much of the framework’s value markets had already priced in before it later fell apart.
That window closed without a final agreement. Al Jazeera reported that the memorandum expired around August 16-17 with little sign either side would extend it, and that both governments had spent weeks accusing each other of violations. Reuters reported on August 12 that Iran saw no progress on reviving the interim deal, noting Trump had declared it “over” on July 7 and Iran’s foreign ministry had called it “suspended” a week later. The collapse came despite concrete goodwill steps taken earlier in the year: NBC News reported that Washington announced a temporary easing in March 2026 allowing the sale of 140 million barrels of stranded Iranian oil, a gesture that ultimately wasn’t enough to keep the broader framework alive. For a market asking about a signature by August 31, each of those data points reads as a push toward zero.
Who and What Is Involved
The named principals are President Donald Trump on the US side and President Masoud Pezeshkian on the Iranian side. Pakistan served as the lead mediator that produced the June memorandum, and Oman has been central to the more recent technical talks over the Strait of Hormuz. Iran’s foreign ministry spokesperson Esmaeil Baghaei has been the public voice on the Iranian negotiating position, describing the Oman channel as continuing while dismissing the 60-day deadline as no longer relevant.
The tone from Washington hardened as the deadline passed. Per CNN’s live coverage, Trump threatened to strike Oman if it interfered with US efforts around the Strait of Hormuz, and by August 18 he said there were no talks underway or scheduled with Iran. That absence of any scheduled negotiation is the single most important fact for the market: you cannot sign a comprehensive treaty in days when the parties are not at the table.
The Hormuz Angle and Why Finance Readers Should Care
The dispute is not abstract for markets. The Strait of Hormuz carries a large share of the world’s seaborne oil, and the fight over who controls shipping through it has kept traffic depressed. CNN reported on August 21 that US gasoline prices were up nearly a dollar from a year earlier as Hormuz traffic remained low. That is a far cry from the upside analysts once modeled: AInvest projected back in April 2025 that easing sanctions could lift Iran’s oil output from roughly 2 million to 4 million barrels per day, adding about 2% to global supply — a scenario that has stayed theoretical now that the framework has collapsed and shipping through the strait remains constrained. The vague wording of the June memorandum, especially over who ultimately controls approved shipping routes, was a core reason the framework unraveled.
That is why energy and macro desks track this story even without touching a prediction market. Deloitte’s mid-2026 growth outlook had gone as far as assuming full trade resumption through Hormuz from mid-2026 onward, baking that premise into its global growth forecasts — an assumption the framework’s collapse now calls into question. The same geopolitical risk shows up in adjacent contracts: Manifold has hosted a separate market on Bitcoin’s level before Hormuz reopens, and the broader pattern of geopolitical odds moving on headlines echoes what we saw with Argentina country-risk markets. Prediction markets increasingly serve as a fast, if imperfect, sentiment gauge alongside options and credit spreads.
Timeline: How the Framework Fell Apart
| Date (2026) | Development | Direction for “yes by Aug 31” |
|---|---|---|
| June 17 | Islamabad Memorandum signed remotely by Trump and Pezeshkian; 60-day window to reach a final deal | Raised hopes |
| July 7 | Trump declares the memorandum “over” | Negative |
| Mid-July | Iran’s foreign ministry calls the memorandum “suspended” | Negative |
| August 12 | Reuters: Iran reports no progress on reviving the interim deal | Negative |
| August 16-17 | 60-day memorandum expires with no permanent deal; no extension agreed | Strongly negative |
| August 18 | Trump says no talks underway or scheduled with Iran | Strongly negative |
| August 21 | US gas prices up nearly a dollar year on year as Hormuz traffic stays low | Context |
| August 26 | Manifold market sits at 2% yes amid a 24-hour volume spike | Near-certain no |
What to Watch Next
Three signals would matter before August 31. First, any announced summit or a circulated draft treaty: none has been reported. Second, movement on the Strait of Hormuz through the Oman channel, since a management deal there could restart broader talks even if it falls short of a formal peace agreement. Third, any joint declaration to extend or revive the memorandum, which both sides have so far declined to make.
Absent one of those, the market’s base case is a clean resolution to no when the clock runs out. After that, attention likely shifts to whether the fragile pause in fighting holds without any framework underpinning it, and whether a new negotiating track emerges in September. The pattern of deadline-driven markets is familiar from other verticals, including the way traders positioned around Manifold’s Fed rate markets, where the resolution date itself concentrates the trading.
Frequently Asked Questions
Does 2% mean a deal is impossible? No. It means the market assigns roughly a 2% chance, or about 1 in 50, that a formal end-of-war agreement is signed by August 31, 2026. It reflects crowd expectation, not certainty, and it can move if a genuine breakthrough is announced.
Didn’t the US and Iran already sign something? Yes, but it was an interim framework, the June 17 memorandum of understanding, not a final peace treaty. That document expired around August 17 without producing the comprehensive deal it was meant to lead to.
Why is trading volume spiking if the price is not? Because the resolution date is close. Deadline-driven markets often see heavy last-mile activity as participants confirm the outcome and close positions, even when the price stays near a floor or ceiling.
Is Manifold real-money betting? For most users Manifold runs on play-money, so it functions more like a forecasting tournament than a regulated exchange. That changes the stakes but not the basic mechanic of a crowd-sourced probability. Compare venues in our Kalshi vs Polymarket breakdown.
The Bottom Line
Sources
- Manifold — Will the US and Iran sign a formal end-of-war agreement by August 31, 2026?
- Reuters — Iran says no progress on reviving interim peace deal with US
- Al Jazeera — US-Iran Memorandum of Understanding expires: How and why it fell apart
- CNN — Deadline to reach US-Iran deal expires, Trump threatens Oman
- CNN — US gas prices up nearly a dollar as Hormuz traffic remains low
- NPR — Full text of the US-Iran memorandum of understanding
- Al Jazeera — Iran, US presidents sign deal to extend ceasefire, reopen Strait of Hormuz
This article is for information only and is not investment, trading, or betting advice. Prediction markets carry risk, and prices can move against you. Market availability is restricted by jurisdiction: Polymarket is not available to US persons, while Kalshi is a CFTC-regulated US exchange; Manifold operates primarily on play-money. Age limits of 18+ or 21+ apply where relevant. If gambling is affecting you or someone you know, help is available in the US at 1-800-GAMBLER.
