PEEK材料概念涨幅居前，21位基金经理发生任职变动

Market Performance - On August 15, A-shares saw all three major indices close higher, with the Shanghai Composite Index rising by 0.83% to 3696.77 points, the Shenzhen Component Index increasing by 1.6% to 11634.67 points, and the ChiNext Index up by 2.61% to 2534.22 points [1] Fund Manager Changes - In the past 30 days (July 16 to August 15), there were 516 fund manager changes across various fund products, with 18 announcements made on August 15 alone. The reasons for these changes included 3 managers leaving due to job changes and 3 due to product expirations [3][4] - Notable fund managers who left include Zhou Ping from Western Leading Individual Stock Selection Fund due to product expiration, and Mo Zhitong from multiple funds due to job changes [4] Fund Manager Performance - Wang Zihua from Harvest Fund has a total asset scale of 18.16 billion yuan, managing index funds, with the highest return of 76.58% from the Harvest Hang Seng Medical Healthcare ETF (159557) during his tenure [4] - Xu Meng from Huaxia Fund has an asset scale of 261.59 billion yuan, with the highest return of 143.10% from the Huaxia Strategic Emerging Index ETF during his 2 years and 45 days of management [5] Fund Research Activity - In the past month, Huaxia Fund conducted the most company research, engaging with 58 listed companies, followed by Penghua Fund with 52 and Southern Fund with 49 [6][7] - The most researched industry was communication equipment, with 281 instances, followed by chemical products with 213 [7] Recent Stock Research - The most focused stock in the past month was Defu Technology, with 79 fund management companies participating in its research, followed by Zhongji Xuchuang and Zhongchong Co., with 75 and 71 respectively [8][9] - In the past week (August 8 to August 15), the most researched company was Nanwei Medical, with 60 fund institutions involved [8][9]