交投回暖个股活跃，沪指半日微涨0.03%

Market Overview - A-shares experienced narrow consolidation with individual stocks being relatively active, as the Shanghai Composite Index fell by 0.03% to 3287.45 points, while the Shenzhen Component Index rose by 0.09% and the ChiNext Index increased by 0.05% [1][2] - The total trading volume for A-shares reached 657.55 billion yuan during the half-day session [1] Monetary Policy - The People's Bank of China conducted a 7-day reverse repurchase operation amounting to 340.5 billion yuan at a fixed rate of 1.50%, with a net injection of 120 billion yuan for the day after 220.5 billion yuan of reverse repos matured [2] Regulatory Actions - The National Development and Reform Commission, in collaboration with the Ministry of Commerce and the State Administration for Market Regulation, announced a campaign to eliminate unreasonable market access barriers, aiming to create a fair market environment and support the construction of a unified national market [3] Sector Performance - PEEK materials concept stocks saw significant gains, with companies like Juhua and Xinhang New Materials hitting the daily limit [3] - The chemical and environmental protection sector also performed well, with United Chemical reaching a historical high [3] - The computing power industry chain continued its rebound, with Hongbo shares achieving three consecutive limits [3] Notable Companies - Water Co., Ltd.: The company has overcome raw material constraints for its key product LCP, benefiting from growth in sectors such as new energy vehicles and AI computing [7] - Plit: As a leading player in the modified plastics industry, the company has made rapid advancements in semi-solid battery technology [7] - Zhongjian Technology: Recognized as a leader in high-end carbon fiber for aerospace, the company has broken through production capacity bottlenecks [8] - Everbright Tongchuang: Initially focused on laptop casing applications, the company is now expanding into the foldable smartphone market [8]