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PolymarketGeopoliticsUpdated 11m ago

Israel military action against Yemen by September 30?

Market probability
16.0%
3.4 percentage points
over 24 hours19.4%16.0%
10 days until the qualification deadline
Latest eligible start date: September 30, 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: healthy trading volume and market depth, 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: healthy trading volume and market depth, an unusually wide spread.

Consensus stability

Has the market settled at the new probability?

Forming

Movement has slowed (3.4 points 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$3.9K 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 Israel takes a qualifying military action against Yemen by the specified date, 11:59 PM 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 Israel, that directly impacts Yemen.

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 Israel takes a qualifying military action against Yemen by the specified date, 11:59 PM 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 Israel, that directly impacts Yemen. 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 Yemen do not constitute a military action regardless of any damage incurred. “Yemen” refers to the territory within the internationally recognized borders of Yemen. If the precise location of a strike cannot be clearly attributed to the defined territory, it will not 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. If, at the end of the third calendar day, conflicting reports remain as to the occurrence, attribution, or timing of the action, this market will resolve 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 governments and militaries of Israel and Yemen and credible reporting.

Why the odds moved

The probability fell 3.4 percentage points over the last 24 hours (19.4% 16.0%).

No verified catalyst has been linked to this move yet. ProbCast does not attribute moves to news without evidence connecting the timing of a specific report to the repricing.

What could move this market next?

  • The latest eligible start date passesSeptember 30, 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, 3:39 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 ±31 pts.

Thin marketLegacy movement classifier: noisy

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 (4.2 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
8Low
Where the price path tends to go next350 observed
  • Choppy / mean-reverting89%
  • Stable consensus4%
  • Thin-liquidity spike3%

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 Reacting to news.

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

$32.1K

Liquidity

$27.5K

Total volume

$80.1K

Category
Geopolitics
Venue
Polymarket
Open interest
Spread
4.2 pts
Best bid
13.9%
Best ask
18.1%
7-day range
9.8% – 20.4%
Resolves
Sep 30, 2026
Change (pts)1H+1.06H-3.424H-3.47D-3.4

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