Ongoing hybrid incidents and airspace violations by Russian forces against NATO's eastern flank, including multiple drone incursions into Poland in September 2025 that prompted Article 4 consultations and Operation Eastern Sentry without reaching the armed-attack threshold for Article 5, continue to shape trader assessments. These events, alongside similar probes in Estonia, have prompted enhanced vigilance activities and collective defensive measures rather than collective-defense obligations, consistent with NATO's historical pattern of managing gray-zone activity below the invocation line. With the Russia-Ukraine conflict persisting without direct spillover onto alliance territory and no major diplomatic or military escalations in recent months crossing that threshold, the market reflects sustained expectations that deterrence and calibrated responses will keep full Article 5 activation unlikely through 2026.