突然大跌超6%！发生了什么?

Market Overview - The Shanghai Composite Index experienced a slight decline of 0.22%, closing at 3380.19 points, while the Shenzhen Component Index fell by 0.72% to 10219.62 points, and the ChiNext Index dropped 0.96% to 2045.57 points [1] - The North Stock Exchange 50 Index saw a significant drop of 6.15% after recently reaching a historical high [1][6] - The total trading volume in the Shanghai, Shenzhen, and North Stock Exchanges was 113.99 billion yuan, a decrease of 74.7 billion yuan from the previous day [1] Sector Performance - Consumer sectors such as tourism, catering, and food and beverage collectively declined, while the banking sector showed resilience with notable gains [1][10] - The banking sector saw increases, with China CITIC Bank and Qingdao Bank rising over 3%, and several banks reaching new highs during the trading session [10][12] - The military industry sector performed strongly, with stocks like Guoke Tiancai and Sichuan Chuangxin hitting the daily limit [1] - AI application concepts remained active, with stocks like Kunlun Wanwei and Huibo Yuntong also hitting the daily limit [1] Individual Stock Movements - In the Hong Kong market, the Hang Seng Index fell by 1.25%, and the Hang Seng Technology Index dropped by 1.81% [2] - Notable declines included Alibaba Health down over 6%, Lenovo Group down over 5%, and Baidu Group down over 4% [2] - Conversely, Xpeng Motors and Pop Mart both saw increases of 6%, with Pop Mart's market capitalization surpassing 300 billion HKD [2] Specific Stock Highlights - Nanjing Port experienced significant volatility, initially hitting the daily limit down before rebounding to close up 7.2%, with total trading exceeding 1.65 billion yuan [14] - The stock had previously shown a "limit-up" pattern over several trading days, indicating strong market interest [16] - The company provides services related to the handling and storage of oil and chemical products, with a focus on container services [16]