A special court has directed the Anti-Corruption Bureau (ACB), Mumbai to file an FIR against former Sebi chairperson Madhabi Puri Buch, three current whole-time members of the market regulator and two BSE officials over allegations of stock market fraud, regulatory violations, and corruption related to the listing of a company in 1994. The order from the special court comes just a day after Buch's tenure as Sebi chief came to an end on February 28.