Trader consensus implies an 86.5% probability against NATO invoking Article 5 before 2027, driven by the absence of any armed attack on alliance territory amid contained Russia-Ukraine hostilities. Recent hybrid threats, including Baltic drone incursions in March 2026 and prior airspace violations over Poland and Estonia, have been managed through intercepts and Article 4 consultations without crossing the invocation threshold, which requires consensus on a qualifying assault. NATO's bolstered eastern flank deployments and deterrence posture have prevented escalation, while EU leaders' late April discussions on mutual assistance pacts under Article 42.7 reflect hedging against U.S. reliability concerns rather than imminent risks. Only a major spillover, such as Russian incursion into Poland or the Baltics, could shift odds significantly before year-end.