Regulatory Action - India's market regulator, Sebi, imposed a temporary ban on a major market player [1] - Sebi barred Jane Street from accessing the local securities market, alleging index manipulation and misleading retail participants [2] - Sebi ordered the seizure of 70 million USD from Jane Street [2] Market Impact and Concerns - The case could have a chilling effect on global trading firms eyeing India's derivatives market [3] - High-speed trading firms' profits are seen as coming at the expense of small investors [4] - Sebi reports that 90% of investors lost money on derivatives [4] Jane Street's Response - Jane Street disputes Sebi's allegations, calling them "erroneous" and "unsupported" [3]