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PolymarketGeopoliticsUpdated 10m ago

Houthi military action against Saudi Arabia on September 21?

Market probability
49.5%
+1 percentage point
over 24 hours48.5%49.5%
1 day until the qualification deadline
Latest eligible start date: September 21, 2026 at 4:59 PM ET
The market can resolve after this date while a qualifying period defined in the rules completes.

The move lacks solid trading support — treat the new probability with caution.

The pricing has weak support: moderate trading volume, an unusually wide spread.

How credible was the move?

Three separate questions — a move can be genuine while the latest price is still settling. Methodology →

Move validity

Is the move backed by real trading and depth?

Weak

The pricing has weak support: moderate trading volume, an unusually wide spread.

Consensus stability

Has the market settled at the new probability?

Forming

Movement has slowed (1 point over six hours) but the market has not fully settled.

Contract clarity

Will the rules resolve without ambiguity?

High

The resolution rules are relatively specific, with a named source and a defined deadline.

Recent trade activity$18.2K traded

From the latest trade tape (most recent 200 prints) — a live activity sample, not a lifetime total.

What this market actually measures

This market will resolve to “Yes” if the Houthis take a qualifying military action against Saudi Arabia on the specified date, Arabia Standard Time (AST). Otherwise this market will resolve to “No.” A qualifying military action refers to an air strike or a surface-to-surface missile strike, initiated by the Houthis, that directly impacts Saudi Arabia.

This summary shows the opening of the venue's official rules. ProbCast has not yet generated an independent plain-English interpretation for this contract — review the full rules before relying on it.

View full official resolution rules

This market will resolve to “Yes” if the Houthis take a qualifying military action against Saudi Arabia on the specified date, Arabia Standard Time (AST). Otherwise this market will resolve to “No.” A qualifying military action refers to an air strike or a surface-to-surface missile strike, initiated by the Houthis, that directly impacts Saudi Arabia. An air strike includes bombs, air-to-surface missiles, and air-launched drones. A surface-to-surface missile strike includes one-way attack drones and surface-to-surface missiles such as cruise or ballistic missiles. The following actions do not constitute a qualifying military action: Munitions destroyed or intercepted before impact; Surface-to-air missile strikes; Small-arms fire; Ground incursions; Cyber operations; Naval gunfire and artillery fire; Howitzers, artillery pieces, mortars, and rocket artillery (e.g. MLRS systems); Minor surface-to-surface strikes, including short range loitering munitions, FPV drones, and ATGM strikes; Any threat, authorization, or announcement of force that has not been executed. Any munition that is intercepted or destroyed before impact does not constitute a qualifying military action. Debris, fragments, or any wreckage from intercepted munitions that land on Saudi Arabia do not constitute a military action regardless of any damage incurred. “Saudi Arabia” refers to the terrestrial territory of Saudi Arabia, including its internal waters. Saudi Arabia’s maritime territory and airspace are not encompassed. Where territorial borders are disputed, all territory claimed by and under the de facto control of Saudi Arabia as of market creation will qualify. The occurrence, attribution, and timing of a qualifying military action will be primarily determined based on a consensus of information available from the resolution sources. Where multiple sources conflict regarding the occurrence, attribution, or timing of a relevant military action, this market will remain open until the earlier of: i) the confirmation of the occurrence, attribution, and timing of the action based on a consensus of information available from the resolution sources or ii) 3 full calendar days (AST) from the date of the first credibly reported evidence of the action. If this period would extend past the end date, this market will remain open to allow for 3 full calendar days to pass. At the end of the third calendar day, if conflicting reports remain, the incident will be adjudicated based on the totality of information available from the resolution sources at that time. No single statement, denial, or presentation of evidence will govern where it is contradicted by the totality of information. The resolution sources for this market will be official information from the government and military of Saudi Arabia and the Houthis and a consensus of credible reporting.

What could move this market next?

  • The latest eligible start date passesSeptember 21, 2026 at 4:59 PM ET

    After this date, no new qualifying period can begin under the rules.

  • Completion of the qualifying period defined in the rules

    Resolution follows once the defined period finishes without a disqualifying event.

Derived from the contract's own mechanics as of Sep 20, 9:38 AM ET. ProbCast does not list scheduled meetings, announcements, or data releases it cannot verify.

Advanced analysis (experimental)

Research signals — these models are still accumulating the history needed for full validation, and they can disagree with the headline read. Model confidence: low · expected error ±33 pts.

Thin marketLegacy movement classifier: watch

What's happening

medium classifier confidence
Thin market

Thin book and/or wide spread. Small orders can move this price disproportionately, so any single print is noisy and easily overread.

  • Wide spread (71.0 pts)

Read with caution —Read the latest price with caution; conditions make it an unreliable summary right now.

More details — reliability score, dynamics, durability
Reliability score
0Low
Where the price path tends to go next321 observed
  • Choppy / mean-reverting89%
  • Stable consensus5%
  • Trend continuation3%

Short-term motion of the price line (~1h), distinct from the environment above — not a prediction of the final outcome.

DurabilityMedium· half-life <1h
PredictabilityElevated irreducibility

Secondary read: leaning toward Resolving soon.

A read-only classification of the market environment — how much weight the current price deserves as a read of consensus. It describes conditions, never a trade.

Market data

24h volume

$37.3K

Liquidity

$159.1

Total volume

$37.3K

Category
Geopolitics
Venue
Polymarket
Open interest
Spread
71.0 pts
Best bid
14.0%
Best ask
85.0%
7-day range
48.5% – 53.5%
Resolves
Sep 21, 2026
Change (pts)1H-1.06H+1.024H+1.07D+1.0

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