2/10年期美债收益率周五跌超3.5个基点，本周长端美债收益率至少涨3.6个基点

Core Viewpoint - The U.S. Treasury yields showed mixed movements with the 10-year yield declining slightly while the 20-year and 30-year yields increased, indicating fluctuations in investor sentiment and market dynamics [1] Summary by Relevant Categories 10-Year Treasury Yield - The 10-year benchmark Treasury yield fell by 3.58 basis points to 4.4155% on July 18, with a weekly increase of 0.62 basis points [1] - The yield traded within a range of 4.3915% to 4.4933% during the week, experiencing a notable short-term rally on Tuesday before gradually retreating [1] 2-Year Treasury Yield - The 2-year Treasury yield decreased by 3.54 basis points to 3.8691%, with a cumulative decline of 1.59 basis points for the week [1] - The yield fluctuated between 3.9587% and 3.8564% during the week, showing a significant "n-shaped" movement on Tuesday and Wednesday [1] 20-Year and 30-Year Treasury Yields - The 20-year Treasury yield increased by 3.60 basis points, reaching 4.9807% [1] - The 30-year Treasury yield rose by 3.84 basis points, closing at 4.9875% [1]