Traders assign an 81.5% probability against a U.S. invasion of Cuba in 2026 because bilateral relations continue to center on economic sanctions, migration enforcement agreements, and periodic diplomatic contacts rather than military planning. No recent official statements from the White House or Pentagon, troop deployments, or congressional authorizations have indicated any shift toward invasion, consistent with decades of U.S. policy that relies on executive orders and legislative tools instead of direct intervention. Hemispheric security discussions in early 2026 have focused on counter-narcotics and regional stability without involving Cuban territory. Significant structural barriers, including international opposition and domestic political constraints, reinforce the current trader consensus. Late-breaking events such as major diplomatic ruptures or unexpected regional escalations remain the only plausible factors that could move these odds.