美债收益率普跌，长端美债收益率至少跌超8个基点

Core Viewpoint - The U.S. Treasury yields experienced a significant decline on May 27, with the 10-year benchmark yield falling by 7.92 basis points to 4.4338% after a long weekend, indicating a downward trend in the bond market [1] Group 1 - The 10-year Treasury yield traded within a range of 4.5070% to 4.4259% throughout the day [1] - The 20-year Treasury yield decreased by 8.60 basis points [1] - The 30-year Treasury yield saw a decline of 9.04 basis points [1]