SEBI has barred US-based Jane Street Group from participating in the Indian stock market and ordered it to disgorge unlawful gains of ₹4,843 crore for allegedly manipulating stock indices through derivative positions.

Speaking with reporters over the interim order against the New York-based hedge fund manager, Tuhin Kanta Pandey said surveillance has been increased both by the regulator and also at the exchange level.

India's markets regulator has widened an investigation into alleged market manipulation by U.S. securities trading firm Jane Street to include other indexes and exchanges, a source familiar with the matter said.