Ongoing Russian hybrid threats, including drone strikes on merchant vessels in the Black Sea near Romania and Bulgaria in October 2026, have prompted discussions of Article 4 consultations among eastern flank members. Romania and Bulgaria opted against formal invocation following trilateral talks with NATO Secretary General Mark Rutte, favoring instead a scheduled North Atlantic Council meeting on regional security without triggering the mechanism. This approach follows the most recent invocations by Poland and Estonia in September 2025 over airspace violations. Heightened concerns over sabotage, incursions, and potential escalation shape trader views on the likelihood of another request before year-end, though allies have shown preference for incremental NATO adaptations like enhanced Black Sea presence over immediate Article 4 steps.