Group 1 - Nanjing Port's stock experienced significant volatility, with a closing price increase of 7.21% after a series of trading days marked by extreme fluctuations, including a total trading volume of 16.46 billion yuan and a turnover rate of 27.28% on the latest trading day [1] - The stock price of Nanjing Port increased by a cumulative 103.09% over eight trading days from May 13 to May 22, which triggered a notice of severe abnormal trading fluctuations from the company [1] - The company primarily engages in the unloading and storage services of crude oil, refined oil, liquid chemical products, containers, and general cargo, with its subsidiary focusing on container services without direct involvement in import and export trade [1] Group 2 - During the period of severe stock price fluctuations, Nanjing Port recorded a total trading volume of 67.98 billion yuan and a cumulative turnover rate of 126.24%, with retail investors accounting for 59.74% of the purchases [2] - Notable speculative trading activity was observed, with significant buying and selling from well-known trading groups, including a specific instance where a prominent trading seat purchased approximately 29.84 million yuan worth of shares [2] - The shipping and port sector showed mixed performance, with Nanjing Port rising by 7.21%, while other ports like Xiamen Port and Ningbo Ocean experienced declines of 5.8% and 5.71%, respectively [2]

Core Viewpoint - Nanjing Port (002040) has issued a notice regarding its significant short-term stock price increase, indicating potential risks for investors [1] Company Overview - The main business activities of the company include providing services for the handling and storage of crude oil, refined oil, liquid chemical products, containerized cargo, and general cargo [1]