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.

SEBI has temporarily barred Jane Street from the Indian stock market and impounded ₹4,840 crore for alleged index manipulation, raising concerns about retail traders' vulnerabilities in derivatives trading.

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.