穆迪下调美国主权信用评级，债务高企与利息负担侵蚀美国信用体系

Group 1 - Moody's downgraded the U.S. government's long-term issuer and senior unsecured rating from Aaa to Aa1, marking all three major credit rating agencies have rated U.S. sovereign credit below AAA [1] - The primary reasons for the downgrade include the continuous expansion of U.S. government debt and increasing interest payment ratios, which are significantly higher than those of similarly rated sovereign nations [2][3] - Moody's expects the U.S. federal deficit to widen, reaching nearly 9% of GDP by 2035, up from 6.4% in 2024, primarily due to rising debt interest payments and low revenue [3] Group 2 - The aggressive tariff policies implemented by the U.S. have negatively impacted the country's sovereign credit level, increasing the risk of economic downturn and debt repayment [4] - The combination of high debt levels and rising interest payments is projected to lead to cumulative interest expenditures on U.S. debt reaching $13.8 trillion over the next decade, nearly double the inflation-adjusted total of the past 20 years [5] - The failure of U.S. government policies is accelerating the collapse of U.S. debt credit, with market skepticism about the sustainability of dollar hegemony reaching historical peaks [6]