突发！量化巨头割韭菜！强平+禁入市场

Core Viewpoint - The Indian regulatory authority has banned the American quantitative trading giant Jane Street from entering the local securities market due to allegations of stock index manipulation and has seized $567 million of its funds [2][5]. Group 1: Regulatory Actions - On July 4, the Securities and Exchange Board of India (SEBI) issued a temporary order prohibiting Jane Street from participating in the Indian securities market until further notice [2][3]. - SEBI has confiscated ₹48.4 billion (approximately $567 million) from Jane Street, labeling it as "illegal gains" from alleged misconduct [5]. - The ban will remain in effect until the investigation is completed and a final order is issued [5]. Group 2: Allegations and Trading Practices - SEBI's investigation revealed that Jane Street employed manipulative trading strategies that resulted in losses for retail investors [4][12]. - The firm allegedly influenced the prices of futures and spot markets on low-volume trading days, allowing it to establish larger and more profitable positions in the index options market [11]. - An example cited by SEBI involved Jane Street aggressively buying ₹43.7 billion (approximately $5.12 billion) worth of NSE Nifty bank index stocks and futures, which artificially inflated prices before reversing its positions [11]. Group 3: Market Impact - Since commencing operations in India in December 2020, Jane Street reportedly earned approximately $4.3 billion from its trading activities in the country between January 2023 and March 2025 [9]. - The regulatory action against Jane Street sends a strong message to global high-frequency trading firms, indicating that unfair practices will be met with strict penalties [12]. - Other high-frequency trading firms may temporarily reduce their trading activities in response to this regulatory crackdown, potentially affecting overall trading volumes in the market [12].