The European Union's institutional architecture, anchored in binding treaties and shared governance bodies such as the European Commission, Parliament, and Court of Justice, creates substantial structural barriers to dissolution. Ongoing cooperation on trade, regulation, and foreign policy among 27 member states, reinforced by economic interdependence and recent joint responses to external pressures, underpins the near-certain trader consensus reflected in current pricing. No credible legislative or diplomatic process exists for rapid breakup within the 2027 timeframe. Tail risks that could still shift probabilities include simultaneous member-state withdrawals, a severe multi-country fiscal crisis prompting treaty renegotiation, or major geopolitical shocks altering alliance incentives, though all remain low-probability events absent unprecedented coordination.