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

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 c…