Market Overview - Major A-share indices collectively adjusted, with the Shanghai Composite Index and Shenzhen Component Index both falling over 1.4% [1] - As of the close, the Shanghai Composite Index dropped 1.76% to 3800.35 points, while the Shenzhen Component Index fell 1.43% to 12295.07 points [2] - The ChiNext Index decreased by 0.69%, and the North China 50 Index saw a decline of 2.6% [1][2] - Total trading volume reached 3.2 trillion yuan, an increase of 488 billion yuan compared to the previous trading day [1] Sector Performance - The aerosol detection sector experienced significant declines, with Jieqiang Equipment falling by 9% [3] - The titanium dioxide sector also weakened, with Zhenhua Co., Ltd. dropping nearly 7% [3] - Micro-cap stocks collectively plummeted, with over 90 stocks declining by more than 5% [3] - The textile and apparel sector showed weak performance, with multiple stocks, including Zhenai Meijia, hitting the daily limit down [3] - The cement and building materials sector weakened, with Sichuan Shuangma falling over 6% [3] Notable Trends - The CPO concept rose against the trend, with Cambridge Technology hitting the daily limit up [3] - The AI chip sector strengthened, with Ruixin Micro and Yanshan Technology both reaching the daily limit up [3] - A few sectors, including F5G concept, minor metals, and optical communication modules, recorded gains [3]

（文章来源：北京商报） 北京商报讯8月14日，A股三大股指集体高开，上证综指早盘走高，盘中一度站上3700点，续刷近四年 新高。之后三大股指震荡走低，截至收盘，上证综指、深证成指、创业板指分别收跌0.46%、0.87%、 1.08%，分别报3666.44点、11451.43点、2469.66点。 成交金额方面，沪市成交金额9494.64亿元，深市成交金额13297.45亿元，两市合计成交金额约2.28万亿 元，系年内第三次破2万亿。 盘面上，保险、数字哨兵、电子身份证等板块涨幅居前，气溶胶检测、房屋检测、PCB等板块跌幅居 前。 个股方面，A股735股飘红，其中52股涨停。此外，4648股飘绿，其中15股跌停。 ...