Jane street:

Jane Street , regulators say, was executing what’s known as an extended ‘marking the close’ strategy — placing large and aggressive buy or sell orders near the end of the trading session, with the intention of artificially moving the closing price of a stock or index. Jane Street Capital is an American proprietary trading firm headquartered in New York City. [4] It employs more than 3,000 [5] people in six offices in New York City, London, Hong Kong, Amsterdam, Chicago, and Singapore, and trades a broad range of asset classes on more than 200 venues in 45 countries. The Securities and Exchange Board of India (Sebi) has accused the quantitative trading firm Jane Street and its entities of manipulating the Indian securities market. Sebi has ordered the confiscation of ‘illegal gains’ to the tune of Rs 4,843 crore. But what happened? How did Jane Street make a profit of hundreds of crores in a single day?