美股操纵案激增至4倍，7成涉及中概股

Core Viewpoint - The article highlights a significant increase in stock price manipulation cases targeting small Chinese companies listed in the U.S., with 70% of suspicious trading activities involving Chinese concept stocks since 2022 [2][4]. Group 1: Stock Price Manipulation Trends - There is a sharp rise in stock price manipulation cases involving small Chinese companies listed in the U.S., with criminals using AI bots to spread false information on chat platforms to lure investors and inflate stock prices [2][4]. - The FBI reported that the number of complaints regarding stock price manipulation quadrupled in 2025 compared to the previous year, with a notable focus on Chinese concept stocks [4][9]. - The "Pump and Dump" scheme, where exaggerated profit claims are made to drive up stock prices before quickly selling off for profit, is increasingly prevalent among these stocks [4][6]. Group 2: Impact on Specific Companies - For instance, Ostin Technology Group's stock price peaked at $225.5 on June 25, only to plummet by approximately 90% the following day, currently trading around $1. The U.S. Department of Justice has initiated criminal proceedings against the company's executives for leading stock price manipulation [7][9]. - Other companies, including Park Ha Biological Technology and Everbright Digital Holding, also exhibited abnormal stock performance, with investor losses estimated at nearly $4 billion [7]. Group 3: Regulatory Responses - In response to the rising manipulation cases, Nasdaq is considering raising the listing requirements for small Chinese companies, proposing that companies must raise at least $25 million during their IPO and implement rapid delisting procedures if their market value declines [8]. - The U.S. Department of Justice has established a dedicated task force to investigate these manipulation cases, including recent criminal charges against individuals involved in manipulating the stock price of China Liberal Education Holdings [9].