A-shares close: ChiNext index opens high, rises nearly 4%, semiconductor and PCB sectors collectively rebound According to Caixin News Agency, the market has fluctuated and rebounded, with the Shanghai Composite Index returning above 4000 points, the ChiNext Index rising nearly 4%, and the Sci Tech Innovation 50 Index rising over 4%. The transaction volume of the Shanghai and Shenzhen stock markets was 2.64 trillion yuan, a decrease of 152.4 billion yuan from the previous trading day. On the market, hot topics quickly rotated, with over 3300 individual stocks rising and over a hundred stocks hitting the limit up. From the perspective of sectors, the semiconductor industry chain is strengthening, with active semiconductor equipment stocks, two consecutive board meetings at Yaxiang Integration, and daily limit up at Xinlai Yingcai and Shenghui Integration. The concept of analog chips fluctuated and rose, with Jewat reaching a limit up of 20cm. The concept of semiconductor silicon wafers is rapidly rising, with TCL Zhonghuan hitting the limit up, and Xi'an Yicai and Shanghai Silicon Industry hitting the limit up by 20CM. The PCB concept has repeatedly strengthened, with Jin'an Guoji 2 consecutive boards, and multiple stocks such as Shandong Fiberglass and Hongchang Electronics hitting the daily limit up. The MLCC concept is once again active, with Lihe Xing reaching its limit up of 20cm, and Fenghua High tech, Shuangxing New Materials, and Boqian New Materials reaching their limit up.