Ongoing war with Russia remains the dominant barrier, as NATO accession requires unanimous ally consent, full interoperability standards, and resolution of territorial disputes before any invitation or ratification. Recent statements from NATO Secretary General Mark Rutte confirm no membership decision has been taken, while U.S. policy under the current administration and demands from Russia in ongoing peace talks explicitly treat NATO entry as incompatible with negotiations. Ukraine has explored alternative security guarantees in place of membership, and internal assessments highlight persistent gaps in capabilities. With only months remaining before 2027, these structural and diplomatic realities underpin trader consensus on a low-probability outcome. Late breakthroughs such as a comprehensive ceasefire enabling accelerated accession talks represent the main variables that could still shift positioning.