A股午评：科创50指数涨3.4%，半导体、算力硬件爆发

Market Overview - The three major A-share indices collectively rose in the morning session on the 18th, with the Shanghai Composite Index up by 0.45%, the Shenzhen Component Index up by 0.79%, and the ChiNext Index up by 0.49% [2] - The North China 50 Index increased by 1.05%, while the Sci-Tech Innovation 50 Index surged by 3.4% [2] - The total trading volume in the Shanghai and Shenzhen markets reached 17,203 billion yuan, an increase of 1,584 billion yuan compared to the previous day [2] Sector Performance - Over 2,700 stocks in the market experienced gains, with notable increases in sectors such as photolithography machines, semiconductors, liquid-cooled servers, copper cable high-speed connections, wind power equipment, and robotics [2] - The semiconductor and computing hardware sectors saw a collective surge, with companies like SMIC, Haiguang Information, Industrial Fulian, and Northern Huachuang reaching historical highs [2] - The humanoid robot sector continued its strong performance, with Wanxiang Qianchao achieving four consecutive trading limit ups, and companies like Junsheng Electronics and Top Group also hitting historical highs [2] - The wind power equipment sector was active, with Tongyu Heavy Industry rising over 10% [2] Declining Sectors - The non-ferrous metals, large financials, pork, coal, and airport shipping sectors experienced declines [2] - The gold and non-ferrous metal sectors mostly fell, with companies like Xiaocheng Technology, Hunan Silver, and Hunan Gold showing significant losses [2] - The securities sector also lagged, with stocks like Shouchuang Securities and Guosheng Financial Holdings dropping over 5% during the session [2]