1. Report Industry Investment Rating - No information provided 2. Core Viewpoints - The central value of the trading duration of general credit bonds is stable around 2.2 years. As of March 20, the weighted trading durations of urban investment bonds and industrial bonds were 2.16 years and 2.29 years respectively, at the 90% and 74% historical quantiles since 2021. Among commercial bank bonds, the weighted average trading durations of secondary capital bonds, bank perpetual bonds, and general commercial financial bonds were 4.15 years, 3.41 years, and 1.73 years respectively. The duration quantile of secondary capital bonds was relatively high, while that of general commercial financial bonds remained at a relatively low historical level. For other financial bonds, the durations of securities company bonds, securities subordinated bonds, insurance company bonds, and leasing company bonds were 1.96 years, 2.87 years, 3.52 years, and 1.23 years respectively, all of which were longer than last week and at relatively high historical quantiles [2][9]. - The coupon duration congestion index has declined. After reaching its peak in March 2024, the index has fallen and is currently at the 48% level since March 2021 [12]. 3. Summary by Directory 3.1 Full - Variety Term Overview - The central value of the trading duration of general credit bonds is stable around 2.2 years. As of March 20, the weighted trading durations of urban investment bonds and industrial bonds were 2.16 years and 2.29 years respectively, at the 90% and 74% historical quantiles since 2021. Among commercial bank bonds, the weighted average trading durations of secondary capital bonds, bank perpetual bonds, and general commercial financial bonds were 4.15 years, 3.41 years, and 1.73 years respectively. For other financial bonds, the durations of securities company bonds, securities subordinated bonds, insurance company bonds, and leasing company bonds were 1.96 years, 2.87 years, 3.52 years, and 1.23 years respectively, all longer than last week and at relatively high historical quantiles [2][9]. - The coupon duration congestion index has declined. After reaching its peak in March 2024, the index has fallen and is currently at the 48% level since March 2021 [12]. 3.2 Variety Microscope 3.2.1 Urban Investment Bonds - The weighted average trading duration of urban investment bonds hovers around 2.37 years. The duration of Sichuan provincial urban investment bonds has extended to 4.05 years, while that of Henan provincial urban investment bonds has shortened to around 1.65 years. The historical quantiles of the durations of Jiangsu and Beijing district - level urban investment bonds have exceeded 90%, and the duration of Jiangsu prefecture - level urban investment bonds is approaching the highest level since 2021 [3][16]. 3.2.2 Industrial Bonds - The weighted average trading duration of industrial bonds has shortened compared to last week, generally around 1.94 years. The trading duration of the real estate industry has extended to 1.84 years, while that of the public utilities industry has shortened to 2.58 years. The trading duration of the building materials industry is at a relatively high historical quantile, while those of the transportation and coal industries are at relatively low historical quantiles [3][23]. 3.2.3 Commercial Bank Bonds - The duration of general commercial financial bonds has shortened to 1.73 years, at the 13.8% historical quantile, lower than the level of the same period last year. The duration of secondary capital bonds has shortened to 4.15 years, at the 86.4% historical quantile, higher than the level of the same period last year. The duration of bank perpetual bonds has extended to 3.41 years, at the 49% historical quantile, lower than the level of the same period last year [3][25]. 3.2.4 Other Financial Bonds - In terms of the weighted average trading duration, insurance company bonds > securities subordinated bonds > securities company bonds > leasing company bonds, at the 77.3%, 88.4%, 83.3%, and 66% historical quantiles respectively, all slightly higher than last week [3][28].