美国遭遇股债汇“三杀”，美债“灰犀牛”或冲击全球金融市场

Group 1 - The U.S. financial market experienced significant turmoil on May 21, with U.S. Treasuries, equities, and the dollar all declining sharply [1][3] - The auction results for the 20-year Treasury bond revealed a yield of 5.047%, a 24 basis point increase from the previous month, marking the second highest level in history [1][3] - The downgrade of the U.S. sovereign credit rating by Moody's from Aaa to Aa1 has put additional pressure on U.S. Treasuries, leading to a rise in long-term bond yields [3][4] Group 2 - The 10-year Treasury yield rose by 12 basis points to 4.56%, while the 30-year yield surpassed 4.7% [3] - The dollar index (DXY) fell by 0.8% to 104.2, reaching its lowest point in a month [3] - Major U.S. stock indices saw significant declines, with the Dow Jones Industrial Average dropping 800 points (1.91%), and the Nasdaq and S&P 500 also experiencing notable losses [3] Group 3 - The U.S. federal government debt-to-GDP ratio has reached 97.8%, with projections indicating it will exceed 107.2% by 2029 [4] - Concerns regarding the sustainability of U.S. debt are growing, potentially increasing the risk premium on long-term U.S. Treasuries [4]