两年期美债收益率涨约4.5个基点，本周第一笔国债拍卖的需求偏冷

Group 1 - The yield on the 10-year U.S. Treasury bond increased by 0.98 basis points, reaching 4.2021%, with intraday fluctuations peaking at 4.2237% before retreating after the release of the ISM non-manufacturing index [1] - The 2-year Treasury yield rose by 4.49 basis points to 3.7201%, maintaining a trading range of 3.6629% to 3.7284% throughout the day [1] - The yield spread between the 2-year and 10-year Treasury bonds decreased by 3.514 basis points, settling at +47.995 basis points, with fluctuations around +51.751 basis points prior to the ISM data release [1] Group 2 - The 20-year Treasury yield fell by 1.33 basis points, while the 30-year Treasury yield decreased by 1.69 basis points [1] - The 3-year Treasury yield increased by 3.64 basis points, the 5-year yield rose by 2.76 basis points, and the 7-year yield went up by 2.06 basis points [1] - Following the ISM non-manufacturing data release, the yield spread attempted to rise to +52 basis points but subsequently declined [1]