European country agrees to give Ukraine security guarantee by...?

According to the latest prediction market data for the query “European country agrees to give Ukraine security guarantee by...? ”, traders have formed a strong consensus.

Currently, December 31 is dominating the market with an overwhelming 11.5% chance of winning. June 30 follows in second place at 0.9%. The betting volume for this specific market has already reached $171.8K, reflecting intense industry interest.

To better assess where each potential outcome stands, the market can be segmented into three distinct trading tiers based on implied probability and contract pricing:

🥇 Tier 1: The Dominant Leader

• December 31 (11.5%): Currently commanding the highest probability, December 31 is heavily favored by the order book. Traders looking to back this outcome face a “Buy Yes” contract price of 12¢, signaling a high degree of market conviction. This contract alone has generated $4.4K in volume.

🥈 Tier 2: The Primary Challengers

• June 30 (0.9%): Positioned as the most viable alternative, June 30 maintains a 0.9% chance of resolving true. Its “Buy Yes” shares currently trade at 1¢.

This market will resolve to “Yes” if any European country formally commits to giving Ukraine a security guarantee, defined as a publicly announced and mutually agreed deal between the relevant European country and the Government of Ukraine which creates a binding obligation for the relevant European country to defend or directly intervene on Ukraine’s behalf, by June 30, 2026, 11:59 PM ET. Otherwise, this market will resolve to “No.”

A qualifying “security guarantee” requires language that is equivalent in character to a NATO Article 5–style mutual defense commitment: the relevant European country must commit to responding militarily if Ukraine is attacked, or otherwise guarantee Ukraine’s defense through binding defense obligations. Examples of qualifying language include commitments modeled on the US treaties with Japan, South Korea, or the Philippines, or NATO's Article 5 instrument, which obligates the United States to “act to meet the common danger” through military force if an ally is attacked. Cooperative frameworks, capacity-building measures, consultative mechanisms, or nonbinding pledges will not qualify.

Examples of non-qualifying arrangements include the June 13, 2024 US–Ukraine bilateral security agreement, the Taiwan Relations Act, or G7/EU “security arrangements” that provide support or consultation but stop short of binding defense guarantees.

A qualifying agreement must be jointly announced and finalized, and take the form of a treaty, executive agreement, memorandum of understanding, joint declaration, or equivalent written instrument. Announcements which are statements of intent, contingent, exploratory, or otherwise not indicative of a formalized policy will not count.

The primary resolution source will be a consensus of credible reporting.

Qualifying European countries include: Albania; Andorra; Armenia; Austria; Azerbaijan; Belgium; Bosnia and Herzegovina; Bulgaria; Croatia; Cyprus; Czechia; Denmark; Estonia; Finland; France; Georgia; Germany; Greece; Hungary; Iceland; Ireland; Italy; Latvia; Liechtenstein; Lithuania; Luxembourg; Malta; Moldova; Monaco; Montenegro; Netherlands; North Macedonia; Norway; Poland; Portugal; Romania; San Marino; Serbia; Slovakia; Slovenia; Spain; Sweden; Switzerland; Ukraine; United Kingdom.

While human consensus and speculative volume shape the broader prediction market, our quantitative algorithms offer a data-driven counter-perspective. By analyzing fundamental signals, underlying trends and historical distributions, our AI Valuation model calculates an independent “Fair Value” probability for each outcome.

Comparing this Fair Value against the current Trade Value uncovers major disparities — known as the Expected Value (EV) Gap. Contracts with a positive EV Gap represent statistically underpriced outcomes, whereas a negative EV Gap flags a potential market overreaction.

Top AI Alpha & Mispriced Arbitrage Opportunities

Based on the latest data model run, several key contracts stand out with significant deviations:

• The Best Value Play (Highest EV) Our model identifies June 30 as the premium value opportunity on the board. While the market only assigns it a 0.9% trading probability, our AI’s Fair Value assessment sits at 19.5% — yielding an impressive +18.6% EV Gap.