Trader consensus implies an 84.5% probability against NATO invoking Article 5 before 2027, driven by the alliance's stringent criteria for collective defense—an armed attack on a member state—and repeated official rejections of lower-threshold provocations. In March 2026, NATO Secretary General Mark Rutte explicitly ruled out Article 5 after Turkey downed an Iranian missile near its airspace, deeming it insufficient despite heightened Middle East tensions. Russia's 2025 surge in airspace violations—18 confirmed over Poland, Estonia, Romania, Finland, and Latvia—prompted North Atlantic Council condemnations and warnings of self-defense measures but no invocation consensus, viewed as hybrid threats rather than attacks. Bolstered eastern flank defenses and European spending hikes toward 2027 U.S.-urged targets reinforce deterrence, keeping invocation risks low absent major escalation.