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]