The Securities and Exchange Board of India (Sebi) is set to undertake a comprehensive overhaul of the small and medium enterprise (SME) listing framework, while also tightening accountability around the use of artificial intelligence (AI) and machine learning (ML) in financial markets. Speaking on the sidelines of the FICCI Annual Capital Markets Conference in Mumbai on Wednesday, Sebi chairman Tuhin Kanta Pandey said the regulator was examining several shortcomings in the SME framework, including difficulties in trading, market making, underwriting and migration to the main board.