午评：沪指半日小幅涨0.31%，商业航天产业链延续强势

Market Overview - The three major indices showed mixed performance in the morning session, with the Shanghai Composite Index up by 0.31%, the Shenzhen Component Index up by 0.03%, and the ChiNext Index down by 0.32% [1] - The total trading volume in the Shanghai, Shenzhen, and Beijing markets reached 1.4078 trillion yuan, a decrease of 57.8 billion yuan compared to the previous day [1] - Over 3,400 stocks in the market experienced declines [1] Sector Performance - The top-performing sectors included carbon fiber, diversified finance, brain-computer interfaces, non-ferrous metals, CPO, wind power equipment, commercial aerospace, and humanoid robots [1] - The sectors that faced the most significant declines were food and beverage, retail, batteries, chemicals, and influenza [1] Notable Stocks - In the carbon fiber sector, Jilin Chemical Fiber reached the daily limit, with Jilin Carbon Valley, Zhongfu Shenying, and Nanjing Julong also showing significant gains [1] - The commercial aerospace sector continued its strong performance, with Shenjian Co. achieving eight consecutive trading limits, Daye Co. four consecutive limits, and Tailong Co. three consecutive limits [1] - Humanoid robot concept stocks saw a surge, with Haoshi Electromechanical, Wuzhou New Spring, and Siling Zhichui leading the gains [1] Underperforming Stocks - The food and beverage and retail sectors collectively declined, with Miaokelan Duo, Baida Group, and Dongbai Group hitting the daily limit down, while Huangshi Group, Nanjiao Food, and Western Pastoral also fell [1] - The battery supply chain underperformed, with XWANDA dropping over 10%, and Haike Xinyuan, Shida Shenghua, and Huasheng Lithium also experiencing declines [1]