华尔街巨头简街集团被印度禁入，没收484亿卢比非法所得！

Core Viewpoint - The major quantitative trading firm Jane Street Group faces significant regulatory action in the Indian market, with the Securities and Exchange Board of India (SEBI) imposing a market ban and accusing the firm of market manipulation, leading to the seizure of illegal profits amounting to 48.4 billion Indian Rupees [1][3]. Group 1: Regulatory Actions - SEBI issued a temporary order against Jane Street Group, marking a pivotal shift in the regulatory stance towards foreign quantitative trading firms in India [1]. - The investigation was prompted by a legal dispute between Jane Street Group and Millennium Management, which revealed details that led to SEBI's scrutiny of the firm's trading practices [3]. Group 2: Profitability and Manipulation - Jane Street Group reportedly made approximately 365 billion Indian Rupees in profits from trading in the Indian derivatives and spot markets between January 2023 and March 2025, equivalent to about 30.6 billion Chinese Yuan [3]. - The firm employed a strategy that involved significant capital deployment on weekly index options expiration days to manipulate prices in lower-volume futures and spot markets, misleading retail investors and establishing larger positions in more liquid index options [3][4]. Group 3: Specific Trading Strategies - The manipulation strategy consisted of three phases: 1. Accumulation phase, where the firm bought a large volume of bank stock index components, pushing the index up by over 1% [4]. 2. Arbitrage phase, where Jane Street aggressively sold call options and bought put options, accumulating short positions totaling 8.75 trillion Indian Rupees [4]. 3. Profit-taking phase, where the firm systematically closed and sold its long positions as stock prices fell, realizing overall profits [4]. - On January 17, 2024, Jane Street achieved a remarkable profit of 86 million USD in a single day, with a net trading value of approximately 511 million USD, making it the second-largest trader in the market, accounting for 15% to 25% of total market trading value [4].