NATO allies have reinforced their eastern flank with additional multinational battlegroups and launched enhanced vigilance activities such as Eastern Sentry, while European members increased defense spending significantly in 2025-2026 and reaffirmed an "ironclad" Article 5 commitment at the July 2026 Ankara summit. The Russia-Ukraine conflict continues without direct attacks on NATO territory, and reported hybrid incidents, including drone incursions, have prompted Article 4 consultations rather than collective defense measures. US force posture adjustments and questions over alliance cohesion have not altered the absence of conditions that would meet the threshold for invocation before the end of 2026. Traders price the low probability of an Article 5 trigger accordingly, reflecting these structural deterrents and the contained nature of current threats.