Trader consensus on an 85.5% implied probability for no NATO Article 5 invocation before 2027 stems from the absence of any armed attack on alliance territory in recent months, despite contained escalations like Russia's Ukraine war and a March ballistic missile intercepted over Turkey, which NATO Secretary General Mark Rutte explicitly ruled out as a trigger. US Defense Secretary Pete Hegseth's March 31 refusal to reaffirm collective defense commitments, followed by President Trump's early April NATO exit threats, has prompted EU leaders to explore Article 42.7 mutual assistance alternatives as of April 24, underscoring alliance strains but no consensus for activation amid diplomatic containment efforts and historical invocation rarity—only once post-9/11—erecting high procedural barriers.