A股午评：沪指冲高回落跌0.17% PCB 板块走强

Market Overview - The three major A-share indices experienced fluctuations, with the Shanghai Composite Index down 0.17%, the Shenzhen Component Index down 0.16%, and the ChiNext Index up 0.10% as of midday trading [1] - The total trading volume in the Shanghai, Shenzhen, and Beijing markets reached 1.1387 trillion yuan, an increase of 146 billion yuan compared to the previous day [1] - Over 3,000 stocks in the market declined [1] Sector Performance - The PCB, film and television, and PEEK materials sectors saw gains, while the coal and steel sectors underwent adjustments [2] - The PCB sector performed strongly, with Fangbang shares hitting the daily limit, and Shenghong Technology rising over 11% [2] - The film and television sector also showed strength, with companies like Happiness Blue Sea and China Film reaching the daily limit [2] - The PEEK materials sector saw gains, with Zhongxin Fluorine Materials hitting the daily limit and Mingyang Technology rising over 14% [2] - The coal sector faced adjustments, with Zhengzhou Coal Electricity and Shanxi Coking Coal both dropping over 5% [2] - The steel sector experienced low-level fluctuations, with Liugang shares falling over 8% [2] Stock Performance Highlights - Xizang Tourism achieved a six-day consecutive limit-up [3] - Tuoshan Heavy Industry recorded a four-day consecutive limit-up [4] - New Agricultural Shares, Zhizhen Technology, and Tianpu Shares each achieved a two-day consecutive limit-up [5] Hot Sectors - The Huawei concept sector had eight stocks hitting the daily limit, with one stock achieving a two-day consecutive limit-up [6] - The artificial intelligence sector also had eight stocks hitting the daily limit, with three stocks achieving consecutive limit-ups, the highest being six days and five limit-ups [7] - The Belt and Road sector had eight stocks hitting the daily limit, with three stocks achieving consecutive limit-ups, the highest being six days and five limit-ups [8] Market Trends - In the artificial intelligence sector, relevant stocks include Erkang Pharmaceutical and *ST Tianyu, with news of Shanghai Jiyue Star Intelligent Technology releasing a new generation foundational model at the World Artificial Intelligence Conference [11] - The Chinese government proposed the establishment of a World Artificial Intelligence Cooperation Organization, with Shanghai as a potential headquarters [12] - In the humanoid robot sector, UTree Technology launched its third humanoid robot, "Unitree R1," priced from 39,900 yuan, and has secured orders totaling 124 million yuan [13]