Market regulator Securities and Exchange Board of India (SEBI) has ordered Avadhut Sathe Trading Academy Private Limited (ASTPL) and its founder, Avadhut Sathe, to refund Rs 546.17 crore collected from investors and participants for unregistered investment advisory and research analyst activities. The market regulator has also directed them to deposit Rs 67.87 crore in interest with its Investor Protection and Education Fund (IPEF).