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 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.

SEBI’s ban on Jane Street dents BSE and broker stocks; BSE down 6.4%, Angel One 6%, Nuvama 10.6%. Experts warn of potential impact on volumes, retail activity, and HFTs. SEBI assures long-term market confidence;