**Traders price the "No" outcome at 93.5% because no armed attack on NATO territory has occurred or appears imminent that would meet the Article 5 threshold.** The alliance has invoked the clause only once historically, after the 2001 attacks, and current flashpoints—including Russia’s war in Ukraine and hybrid incidents along the eastern flank—have prompted Article 4 consultations and enhanced forward deployments rather than collective defense activation. NATO continues bolstering deterrence through multinational forces in Finland and the Baltics, increased air policing, and large-scale exercises simulating Article 5 scenarios, while adversaries have avoided direct strikes on member states. With roughly six months remaining before 2027, the absence of escalatory events crossing into NATO territory underpins the strong market consensus reflected in these odds.