Group 1 - The core index, the China Securities A100 Stable Index, closed at 4591.97 points, with a one-month increase of 2.45%, a three-month increase of 5.37%, and a year-to-date increase of 3.32% [1] - The index is constructed based on volatility and quality factors, selecting securities with high risk exposure to macroeconomic changes for the dynamic index and those with lower risk exposure for the stable index [1] - The top ten holdings of the China Securities A100 Stable Index include Kweichow Moutai (11.53%), CATL (9.21%), China Merchants Bank (7.28%), and others, indicating a concentration in specific large-cap stocks [1] Group 2 - The industry composition of the index shows that industrials account for 23.09%, financials for 16.13%, and major consumer goods for 13.13%, among others, reflecting a diverse sector representation [2] - The index samples are adjusted biannually, with changes implemented on the next trading day after the second Friday of June and December, typically not exceeding 10% of the sample [2] - Special adjustments can occur under certain circumstances, such as delisting or corporate actions like mergers and acquisitions [2]