久期如何极致演绎？

1. Report Industry Investment Rating - Not provided in the given content 2. Core View of the Report - As of June 27, the weighted average trading durations of urban investment bonds and industrial bonds were 2.18 years and 3.39 years respectively, both at over 90% quantile levels since March 2021. Among commercial bank bonds, the weighted average trading durations of secondary capital bonds, bank perpetual bonds, and general commercial financial bonds were 4.21 years, 3.54 years, and 2.07 years respectively, with general commercial financial bonds 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 1.54 years, 2.28 years, 3.18 years, and 1.45 years respectively, with securities company bonds and securities subordinated bonds at low historical quantiles and leasing company bonds at a high historical quantile [2][9]. 3. Summary by Relevant Catalog 3.1 Full - Variety Duration Overview - The weighted average trading durations of urban investment bonds and industrial bonds were 2.18 years and 3.39 years respectively, both at over 90% quantile levels since March 2021. Among commercial bank bonds, secondary capital bonds had a duration of 4.21 years (95% quantile), bank perpetual bonds had a duration of 3.54 years (62.6% quantile), and general commercial financial bonds had a duration of 2.07 years (56.3% quantile). For other financial bonds, the durations of securities company bonds, securities subordinated bonds, insurance company bonds, and leasing company bonds were 1.54 years (33.3% quantile), 2.28 years (56.3% quantile), 3.18 years (66% quantile), and 1.45 years (87.8% quantile) respectively [2][9]. - The coupon duration congestion index declined after reaching its peak in March 2024 and then slightly increased. This week, it decreased slightly compared to last week and was currently at the 45% level since March 2021 [12]. 3.2 Variety Microscope Urban Investment Bonds - The weighted average trading duration hovered around 2.18 years. Shaanxi provincial urban investment bonds had a duration of over 8 years, while Fujian district - county - level urban investment bonds' trading duration shortened to around 1.24 years. The duration quantiles of urban investment bonds in regions such as Guangdong prefecture - level cities, Fujian prefecture - level cities, Hebei prefecture - level cities, and Shanxi provincial - level regions exceeded 90%, and the durations of Hunan provincial - level and Henan prefecture - level urban investment bonds were approaching their highest levels since 2021 [3][16]. Industrial Bonds - The weighted average trading duration was around 3.39 years, slightly longer than last week. The trading duration of the steel industry shortened to 1.66 years, while that of the food and beverage industry lengthened to 2.31 years. The real estate industry's trading duration was at a low historical quantile, while industries such as public utilities, transportation, retail, and building materials were at over 90% historical quantiles [3][21]. Commercial Bank Bonds - The duration of general commercial financial bonds shortened to 2.07 years (56.3% quantile), lower than the same period last year. The duration of secondary capital bonds lengthened to 4.21 years (95% quantile), higher than the same period last year. The duration of bank perpetual bonds shortened to 3.54 years (62.6% quantile), also higher than the same period last year [3][24]. Other Financial Bonds - In terms of weighted average trading duration, insurance company bonds > securities subordinated bonds > securities company bonds > leasing company bonds, with quantiles of 66%, 56.3%, 33.3%, and 87.8% respectively. The overall duration of other financial bonds slightly shortened compared to last week [3][27].