标普在赤字与收益率波动间维持美国AA+评级：关税收入对冲“大而美”法案冲击

Core Viewpoint - S&P Global Ratings maintains the United States' long-term credit rating at AA+ and short-term rating at A-1+, citing the resilience of the U.S. credit system despite significant fiscal challenges posed by the recent "Big and Beautiful" tax expenditure bill [1][6]. Group 1: Tax Revenue and Fiscal Impact - The increase in effective tariff rates is expected to generate substantial tariff revenue, which will offset potential weaker fiscal outcomes related to recent U.S. fiscal legislation that includes both tax cuts and increased tariff revenues [2]. - In July, U.S. tariff revenue reached a record high of approximately $28 billion, with projections suggesting that annual tariff revenue could exceed 1% of U.S. GDP by 2025 [2]. Group 2: Debt Market Concerns - Investors have been worried about fiscal deficits and broader debt sustainability issues since the return of Trump to the White House, with the 30-year U.S. Treasury yield rising above 5% in May due to concerns over tariffs and tax legislation [3]. - The "term premium" phenomenon indicates ongoing market concerns regarding the increasing interest payments on U.S. debt, with the 30-year Treasury yield remaining at 4.93% and the 10-year yield at 4.33% [4]. Group 3: Future Projections and Ratings Outlook - S&P's stable outlook suggests that while U.S. fiscal deficits are not expected to improve significantly, they also will not worsen, with net government debt projected to exceed 100% of GDP in the next three years [6]. - The average general government deficit is expected to be around 6% from 2025 to 2028, which is lower than the previous year's 7.5% [6].