刚进入12月，利率债收益率突现陡峭上行，是何原因？

Group 1 - The core viewpoint of the article highlights a sudden increase in bond yields, particularly a rise of 3 basis points in the 10-year government bond yield to around 1.85% and over 7 basis points in the 30-year bond yield [1] - The bond market has entered a "sensitive period" regarding news, with upcoming political meetings expected to influence market expectations for future economic policies [2] - The bond market has shown increased sensitivity to negative news, with the 10-year bond yield rising from approximately 1.82% to 1.86% and the 30-year yield from about 2.18% to 2.27% [3] Group 2 - Analysts attribute the weakness in long-term bonds to several factors, including constraints on institutional investors, potential redemption pressures from public funds, and a shift in investment focus towards equities [4] - The market is currently reacting to expectations surrounding central bank bond purchases and policy direction for the upcoming year, with a net purchase of government bonds by the central bank reported at 50 billion yuan [4] - The upcoming political meetings are expected to influence the bond market, with historical trends suggesting that policy announcements often lead to increased bond market activity in December [7][8]