Sou Hu Cai Jing·2025-04-18 08:23Core Viewpoint - The A-share market indices showed mixed performance, with the Shanghai 180 Industry Layered Equal Weight Index declining by 0.48% to 10,897.68 points, with a trading volume of 98.172 billion yuan. Over the past month, this index has decreased by 3.04%, increased by 0.81% over the last three months, and has fallen by 2.88% year-to-date [1]. Group 1 - The Shanghai 180 Industry Layered Equal Weight Index and the Shanghai 180 Equal Weight Index share the same sample, but the former uses an industry-layered equal weighting method, while the latter employs a simple equal weighting approach. This results in different risk-return characteristics to cater to diverse investor preferences [1]. - The top ten holdings of the Shanghai 180 Industry Layered Equal Weight Index include Poly Development (4.43%), Zhangjiang Hi-Tech (4.26%), China Telecom (2.85%), China Mobile (2.53%), China Unicom (2.42%), China Satellite Communications (2.16%), China Petroleum (1.13%), Dongpeng Beverage (1.11%), China Shenhua (1.1%), and China National Offshore Oil Corporation (1.08%) [1]. Group 2 - The Shanghai Stock Exchange accounts for 100% of the holdings in the Shanghai 180 Industry Layered Equal Weight Index. The industry distribution of the index includes Communication Services (9.96%), Consumer Staples (9.64%), Information Technology (9.60%), Materials (9.32%), Financials (9.24%), Healthcare (9.23%), Utilities (9.07%), Real Estate (8.69%), Industrials (8.53%), Consumer Discretionary (8.48%), and Energy (8.25%) [2]. - The index samples are adjusted biannually, with adjustments occurring on the next trading day after the second Friday of June and December each year. The sample adjustment typically does not exceed 10%, and the weight factors are adjusted accordingly. In special circumstances, temporary adjustments may be made [2].