SANHUA(SZ:002050) Di Yi Cai Jing·2025-10-18 01:57Core Viewpoint - A rumor regarding "Sanhua Intelligent Control securing a $685 million order from Tesla for Optimus linear actuators" triggered a significant surge in the stock price of Sanhua Intelligent Control and related stocks, leading to a rapid market reaction within a short time frame [1][2][4]. Group 1: Rumor Propagation - The rumor initially spread through overseas social media platforms, disguised as a report from domestic media, and was then amplified by other Tesla-related accounts, giving it an "international certification" appearance [2][17]. - The first mention of the rumor occurred on September 29, where a user on the Snowball platform claimed that Sanhua Intelligent Control had received a substantial order from Tesla, which was later deleted [13][15]. - On October 15, a user on X (formerly Twitter) claimed that Sanhua had secured a 50 billion RMB order, which was widely circulated and led to a significant stock price increase [4][8]. Group 2: Market Reaction - On October 15, Sanhua Intelligent Control's stock surged to a limit-up price of 44.18 RMB per share within half an hour, with a total trading volume of 11.98 billion RMB [1][23]. - The stock's sudden rise was accompanied by a significant influx of capital, with notable buying from retail investors, institutions, and northbound funds, totaling around 3.5 billion RMB in the top five trading seats [2][21]. - The trading data indicated that the stock experienced a volatility of over 11% during the trading session, with a peak trading volume of over 140,000 shares in a single minute [3][23]. Group 3: Institutional Behavior - Notable buying activity was observed from a well-known retail investor seat, referred to as "Zhang Mengzhu," which accounted for a net purchase of over 680 million RMB on that day [21][24]. - Conversely, northbound funds and institutional investors exhibited signs of profit-taking, with significant sell-offs amounting to approximately 610 million RMB from northbound funds and net sell-offs from institutional seats [25][26]. - The overall trading dynamics suggested a potential strategy of raising prices to facilitate selling, as evidenced by the contrasting buying and selling behaviors of different market participants [25][28].