Group 1 - The A-share market indices closed mixed, with the Shanghai 180 risk-weighted index at 5107.99 points, showing a 2.82% increase over the past month, a 6.34% increase over the past three months, and a 2.48% increase year-to-date [1] - The Shanghai 180 risk-weighted index and the Shanghai 380 risk-weighted index are designed to equalize the risk contribution of each sample, allowing for risk diversification and a higher Sharpe ratio compared to market capitalization-weighted indices [1] - The index is based on a reference date of December 31, 2004, with a base point of 1000.0 [1] Group 2 - The top ten holdings in the Shanghai 180 risk-weighted index include: Yangtze Power (1.85%), China Construction Bank (1.77%), Agricultural Bank of China (1.62%), Industrial and Commercial Bank of China (1.54%), Bank of China (1.34%), Sichuan Investment Energy (1.27%), Guotou Power (1.17%), Shandong High-Speed (1.12%), China Mobile (1.05%), and Ninghu Expressway (1.04%) [1] - The index's holdings are entirely composed of stocks listed on the Shanghai Stock Exchange, with a 100% allocation [1] Group 3 - In terms of industry allocation, the financial sector accounts for 27.44%, industrial sector for 23.49%, utilities for 10.34%, materials for 9.22%, information technology for 8.17%, consumer discretionary for 5.83%, energy for 5.07%, healthcare for 4.28%, consumer staples for 3.22%, communication services for 2.55%, and real estate for 0.39% [2] - The index samples are adjusted quarterly, with adjustments occurring on the next trading day following the second Friday of March, June, September, and December [2] - Weight factors are generally fixed until the next scheduled adjustment, with special circumstances allowing for temporary adjustments [2]

数据统计显示，上证380等风险加权指数近一个月上涨1.24%，近三个月上涨1.34%，年至今上涨 2.80%。 据了解，上证380等风险加权指数通过风险加权调整，使每个样本股对组合的风险贡献相同。该指数以 2004年12月31日为基日，以1000.0点为基点。 从上证380等风险加权指数持仓样本的行业来看，工业占比29.92%、原材料占比12.71%、可选消费占比 9.70%、医药卫生占比9.18%、信息技术占比7.68%、金融占比7.51%、公用事业占比5.48%、通信服务占 比5.03%、主要消费占比4.75%、能源占比4.71%、房地产占比3.33%。 资料显示，指数样本每季度调整一次，样本调整实施时间分别为每年3月、6月、9月和12月的第二个星 期五的下一交易日。权重因子随样本定期调整而调整，调整时间与指数样本定期调整实施时间相同。在 下一个定期调整日前，权重因子一般固定不变。特殊情况下将对指数进行临时调整。当样本退市时，将 其从指数样本中剔除。样本公司发生收购、合并、分拆等情形的处理，参照计算与维护细则处理。 金融界3月27日消息，上证指数低开高走，上证380等风险加权指数 (380ERC，H500 ...