Traders assign a 98% implied probability against a U.S. default by the end of 2026 because the debt ceiling was raised by $5 trillion in July 2025 to $41.1 trillion, creating substantial headroom that projections from the Bipartisan Policy Center and others place the limit contact in early-to-mid 2027. Extraordinary measures would then extend payment capacity another six to nine months, pushing any X-date well beyond December 2026. Congress has raised or suspended the limit nearly 80 times since 1960, and both parties have consistently prioritized avoiding market disruption, higher borrowing costs, and economic fallout. Credit agencies have affirmed stable outlooks on the expectation of timely bipartisan action. Late-breaking developments such as sharply higher deficits from supplemental spending or prolonged post-election impasse could narrow the window but remain unlikely to trigger an actual missed payment within the resolution period.