Traders assign overwhelming odds against a U.S. default by 2027 because Congress has repeatedly raised or suspended the debt limit ahead of any binding constraint, most recently increasing it to $41.1 trillion in 2025. With debt subject to the limit projected to approach that cap in 2027, lawmakers retain procedural options including reconciliation, extraordinary measures by the Treasury, and attachment to must-pass funding bills during the lame-duck session or early in the new Congress. Both parties face strong incentives to avoid the severe market disruption, higher borrowing costs, and credit-rating damage that would follow an actual default. While post-election shifts in congressional control could complicate negotiations and extend brinkmanship, the consistent historical pattern of eventual resolution keeps implied probabilities of default extremely low.