军工股，大爆发

Market Overview - A-shares experienced narrow fluctuations in the morning session, with the three major indices showing slight increases. The Shanghai and Shenzhen markets had a half-day trading volume of 1.06 trillion, an increase of 52.5 billion compared to the previous trading day. The Shanghai Composite Index closed at 3627.54 points [1]. Sector Performance - The PEEK materials concept stocks continued to surge, with Zhongxin Fluorine Materials achieving two consecutive trading limits. Military stocks also saw significant gains, with Great Wall Military Industry hitting four trading limits in five days. Liquid cooling server concept stocks rose sharply, with Kexin Innovation Source reaching a 20% trading limit. Conversely, pharmaceutical stocks underwent adjustments, with companies like Hanyu Pharmaceutical seeing declines of over 5% [3]. - The sectors with the highest gains included PEEK materials, military, liquid cooling servers, and humanoid robots, while the sectors with the largest declines included traditional Chinese medicine, Tibet-related stocks, innovative pharmaceuticals, and film and television [3]. - By the end of the session, the Shanghai Composite Index rose by 0.27%, the Shenzhen Component Index increased by 0.46%, and the ChiNext Index gained 0.39% [3].