Whether arbitrage or manipulation, the Jane Street episode highlights a critical truth: markets need more transparency, more accountability, and more human judgment.

Jane Street has been barred from the Indian securities market by its markets regulator, which has said the U.S. firm used its trading strategies to "manipulate" a key stock market index, leading to losses for millions of retail investors,

India’s market regulator SEBI has barred US-based Jane Street from trading in local securities, alleging manipulative trades that earned it ₹4,843 crore ($570 million) in unlawful gains