How the contract works
A contract on this question settles at $1 if no qualifying US military action hits Yemen before 31 October 2026, 11:59 PM Yemen Standard Time, and at nothing if one occurs before then. The price at any moment reflects what buyers and sellers currently think the chance of that outcome is; a contract trading at 0.30, for example, would imply the market sees roughly a three-in-ten chance the ceasefire survives, not this market's actual level. Settlement relies on US military action reports from the Department of Defense, Reuters, and the Associated Press, which determine whether a reported incident meets the specific strike and target definitions in the rules. A position in this market can generally be sold before the settlement date at whatever price is then available, rather than being held to expiry.
Yes94%
No6%
Probability
How the price has moved
The only available reading, from Polymarket on 22 October 2026, puts the market-implied probability at 94% on cumulative volume of $396,031. No separate venue currently lists this contract, so there is no cross-market spread to measure disagreement, and no day-over-day or week-over-week move is available to describe. What the snapshot does show is a market pricing the ceasefire as largely durable rather than genuinely uncertain, consistent with a truce that has already run for well over a year without a qualifying US strike.
Analysis
Context
The question concerns the standoff between the United States and Houthi forces in Yemen, which has run alongside the wider Gaza war since late 2023. Houthi forces began attacking commercial and military vessels in the Red Sea and Bab-el-Mandeb Strait, prompting repeated US and UK strikes on Houthi military sites through 2024 and into early 2025, including an intensified campaign under the Trump administration. In May 2025, Oman brokered an arrangement in which the US agreed to halt strikes in exchange for the Houthis stopping attacks on US-linked shipping, and that arrangement has broadly held since.This market asks whether that truce survives through the end of October 2026 without a qualifying US military action against Yemen. The resolution criteria are specific: an air strike or surface-to-surface missile strike, including one-way attack drones, carried out by US armed forces and directly impacting Yemen, would resolve the question No. Intercepted munitions, surface-to-air fire, small-arms exchanges, ground incursions, cyber operations, and naval gunfire or artillery are explicitly excluded, which narrows the range of incidents that could end the ceasefire on paper even if tensions flare.
As of 22 October 2026, the only venue tracking this question is Polymarket, where the market-implied probability stands at 94% on cumulative trading volume of $396,031. With a single venue and no second market to compare against, there is no cross-venue spread to read for disagreement; the number instead reflects the collective judgment of traders on one platform. A level this high, sustained on real volume, indicates that participants see the ceasefire as close to settled rather than genuinely contested.The structural reason the market sits near the top of the range is the ceasefire's track record. The arrangement reached through Omani mediation in May 2025 has now persisted for roughly a year and a half without the kind of qualifying US strike that would resolve this question No, surviving multiple periods of regional tension tied to the Gaza war. That duration matters: ceasefires that hold for extended periods tend to develop their own inertia, as both sides accumulate reasons not to be the one that breaks it.The resolution rules themselves also push toward Yes. By excluding intercepted munitions, naval gunfire, small-arms fire, ground incursions, and surface-to-air strikes, the rules filter out many of the friction incidents that have occurred periodically in the Red Sea without rising to the level of a qualifying US strike. This means the ceasefire can survive on the books even through episodes of lower-level tension, which is part of why traders are willing to price this so high with nine days left in the window.The remaining risk is concentrated in a narrow but real scenario: a Houthi attack on a US-linked or allied vessel severe enough to provoke a US air or missile response, including a one-way attack drone strike, before 31 October. Given the history of this conflict, such an incident would not need advance warning, which is the main reason the price sits below full certainty rather than at the extreme.
What moves the probability
Houthi compliance with the truce
If Houthi forces continue to avoid attacks on US-linked shipping, there is no provocation for a US military response. This is the single largest factor keeping the probability high, since nearly every past round of US strikes followed a Houthi attack on vessels or US assets.
Gaza war spillover
Houthi actions have historically been framed around solidarity with Gaza. Any sharp escalation in that conflict could prompt renewed Houthi attacks, which would in turn raise the odds of a US retaliatory strike before 31 October.
Narrow definition of a qualifying strike
The rules exclude naval gunfire, interceptions, small-arms fire, ground incursions, and surface-to-air fire from counting as a ceasefire breach. This raises the bar for a No resolution and is a structural reason the market sits closer to Yes than raw regional tension might suggest.
Length of the existing ceasefire
The US-Houthi truce dates to May 2025 and has already outlasted several periods of regional friction. Each additional month without a qualifying strike reinforces trader confidence that the arrangement will hold through the remainder of October.
Single-venue, moderate-volume market
With only Polymarket listing this contract and $396,031 in volume, the price reflects a relatively concentrated pool of traders rather than a broad consensus across platforms, which can make it more sensitive to a single sharp news event.
The case for
- The US-Houthi ceasefire brokered by Oman in May 2025 has held for roughly a year and a half without a qualifying US strike on Yemen.
- The resolution rules exclude naval gunfire, interceptions, small-arms fire, ground incursions, and surface-to-air fire, narrowing the set of incidents that could end the truce on paper.
- Both the US and Houthi leadership have shown sustained incentive to avoid restarting a costly air campaign that produced no lasting operational gain for either side.
- As of 22 October 2026, no qualifying US strike on Yemen has been reported by DoD, Reuters, or AP sources for this window.
The case against
- A single Houthi attack on a US or allied vessel in the Red Sea could trigger a US retaliatory air or missile strike within the remaining window before 31 October 2026.
- The definition of a qualifying strike still includes one-way attack drones, which lowers the threshold for what would count as a ceasefire breach.
- US forces remain forward-deployed in the region and have historically responded quickly once a provocation occurs, leaving little lead time for markets to adjust.
- Nine days remain in the resolution window, long enough for an unplanned incident tied to the broader Gaza conflict to unfold.
What to watch
The resolution date is 31 October 2026 at 11:59 PM Yemen Standard Time. Between now and then, the key things to track are any reported Houthi attacks on shipping in the Red Sea or Bab-el-Mandeb Strait, any US Department of Defense or CENTCOM statements about strikes on Yemen, and Reuters or AP reporting that would determine whether an incident meets the specific definition of a qualifying US strike. Developments in the Gaza war are also worth watching, since Houthi actions have historically tracked that conflict's intensity.
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