A-shares close: ChiNext index rebounds and rises 2.66%, with CPO and PCB concepts all rising According to Caixin News Agency, the market has fluctuated and rebounded, with the Shenzhen Component Index rising over 1% and the ChiNext Index rising over 2%. The yellow and white lines are clearly differentiated, and the trend of heavyweight stocks is strong. The transaction volume of the Shanghai and Shenzhen stock markets was 2.77 trillion yuan, a decrease of 84.5 billion yuan from the previous trading day. On the market, the hot topics are quite chaotic, with over 3800 stocks falling across the entire market. From a sector perspective, the CPO concept fluctuated and rebounded during the trading session, with Yuanjie Technology and Guangku Technology both rising by over 10%. The concept of fiber optic technology is rapidly rising, with Hengtong Optoelectronics hitting a new historical high and Changfei Fiber optic hitting the limit up. The concept of PCB fluctuated and rose, and Honghe Technology briefly emerged from the "earth sky board" during trading, while Pengding Holdings hit the daily limit up. The MLCC concept continues to be strong, with Torch Electronics selling 3 boards in 4 days. The concept of robots is showing active performance, with Zhongdalide and Kaidi stocks hitting the daily limit up. The non-ferrous metal sector rose, with Huaxi Nonferrous Metals, Tin Industry Co., Ltd., and Jiangxi Copper Industry hitting the daily limit up.