Group 1: Report Overview - The report is a deep - dive into the bond index system, covering classification, construction, calculation, and evaluation [5][17] - It aims to provide a comprehensive reference for understanding the bond index's compilation basis and internal logic [5] Group 2: Index Classification - Mainstream bond indices are compiled by institutions like ChinaBond, China Securities Index, Shanghai Clearing House, etc [19] - Indices can be classified by bond type (interest - rate bonds, credit bonds, convertible bonds, and composite bonds) and return treatment (wealth index, full - price index, net - price index) [19][24] - Different institutions have unique index family classifications [27] Group 3: Index Construction - Sample bond selection follows criteria such as bond type, credit rating, and remaining maturity, with some indices setting limits on the number of constituent bonds [37] - Market - value weighting is the mainstream method, and some indices set weight caps [42] - Index sample bonds are adjusted regularly (daily, monthly, quarterly) and temporarily, with some indices having an alternative bond mechanism [50][54] Group 4: Index Calculation - There are two main calculation methods: the daily - calculation method and the Paasche - weighting method [61] - The daily - calculation method is used by ChinaBond, Shenzhen, and other institutions, while the Paasche - weighting method is used by China Securities Index and others [61] Group 5: Index Evaluation - Evaluation dimensions include representativeness, transparency, investability, and stability [72] - A comparison between the ChinaBond New Composite Index and the China Securities Composite Bond Index shows differences in constituent bond composition, rating weights, and duration contributions [79][83][88]