Clamping down on unauthorised investment advisory services offered in the name of 'Baap of Chart', regulator Sebi on Wednesday barred three entities from the securities market and ordered impounding illegal gains worth over Rs 17 crore. Mohammad Nasiruddin Ansari, who described himself as an investment wizard, provided recommendations on stocks in the name of 'Baap of Chart' through the social media platform X and messaging app Telegram. The recommendations were given in the garb of providing educational training related to the securities market, according to Sebi.