A-shares close: Sci Tech 50 index falls 5%, with trading volume shrinking by over 440 billion yuan in both markets According to Caixin News Agency, the market surged and fell throughout the day, with the ChiNext Index falling more than 2% and the Sci Tech Innovation 50 Index falling 5%. The yellow and white lines are clearly differentiated, and the trend of small and medium-sized stocks is strong. The transaction volume of the Shanghai and Shenzhen stock markets was 2.88 trillion yuan, a decrease of 441.5 billion yuan from the previous trading day. On the market, the hot topics are quite chaotic, with over 3700 individual stocks rising in the entire market, of which 166 stocks hit the limit up. From the perspective of sectors, the AI application side has exploded, with Tian Di Online holding three consecutive boards, Zhangyue Technology holding two boards in four days, and Vision China, Tax Friend Co., Ltd., and Jiuqi Software hitting the daily limit up. The coal sector is strengthening, with major players including Energy, Zhengzhou Coal and Electricity, Haohua Energy, Jinkong Coal Industry, and Lu'an Environmental Energy hitting the daily limit up. The concept of AI PC is showing active performance, with Spring and Autumn Electronics holding two consecutive boards, and Victory Precision, Yingli Shares, and Thunder God Technology hitting the daily limit up. Gas stocks rose sharply due to abnormal movements, while China National New Energy Corporation hit the daily limit up.