上证小盘指数下跌0.69%，前十大权重包含上海电气等

Group 1 - The A-share market's three major indices closed mixed, with the Shanghai Small Cap Index down 0.69% at 4495.05 points and a trading volume of 99.392 billion [1] - The Shanghai Small Cap Index has decreased by 6.52% over the past month, increased by 1.38% over the past three months, and has fallen by 2.26% year-to-date [1] - The index categorizes listed companies in the Shanghai market into different sizes based on market capitalization and trading volume, reflecting the overall performance of securities from various scales of companies [1] Group 2 - The top ten weighted stocks in the Shanghai Small Cap Index include Hu'nong Commercial Bank (1.18%), Chifeng Gold (1.11%), Chengdu Bank (1.07%), and others, with the index fully composed of stocks from the Shanghai Stock Exchange [1] - The industry composition of the index shows that industrials account for 23.59%, information technology for 18.17%, and financials for 12.57%, among others [2] - The index sample is 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]