沪深300建材指数报6823.44点，前十大权重包含海螺水泥等

Group 1 - The A-share market indices closed mixed, with the Shanghai-Shenzhen 300 Building Materials Index reported at 6823.44 points [1] - The Shanghai-Shenzhen 300 Building Materials Index has increased by 0.28% over the past month, 2.89% over the past three months, and 6.48% year-to-date [1] - The index is designed to reflect the overall performance of different industry companies within the Shanghai-Shenzhen 300 Index, categorized into 11 primary industries, 35 secondary industries, over 90 tertiary industries, and more than 200 quaternary industries [1] Group 2 - The Shanghai-Shenzhen 300 Building Materials Index holdings are entirely composed of stocks from the Shanghai Stock Exchange, with a 100% allocation [2] - The index's sample is exclusively focused on the cement and concrete sector, which also accounts for 100% of the holdings [3] - The index samples are adjusted biannually, with adjustments occurring on the next trading day following the second Friday of June and December each year [3]