The 69.5% market-implied probability favoring no EU long-term sovereign rating downgrade by S&P, Moody’s, or Fitch before year-end 2026 stems primarily from repeated agency affirmations of AAA or AA+ ratings with stable outlooks through mid-2026. These reflect the EU’s supranational structure, joint-and-several backing from high-rated member states, and predictable own-resources revenue, even as outstanding debt approaches €900 billion and the aggregate EU debt-to-GDP ratio edges higher. Recent national actions—such as France’s downgrade to A+ or Slovakia’s cut—have produced no negative watches or outlook shifts for the EU itself. With resolution imminent and no material deterioration in fiscal or institutional metrics reported in 2026 releases, traders price only modest tail risk from further peripheral slippage or policy slippage ahead of final review windows.