The Securities and Exchange Board of India ( Sebi) plans to introduce within two months new norms to regulate algorithmic trading. “Algorithm- based trade or high frequency trades are prone to high risks. We are examining a number of options to bring down these risks,” said Sebi Chairman U KSinha on Thursday. These are trading systems that utilise advanced mathematical models for transaction decisions in financial markets. As of May, 15.1 per cent of the BSE turnover came through the algo route. These trades account for 19.8 per cent of the total on the National Stock Exchange, with an additional 24.3 per cent of volumes coming through co- located servers. The Reserve Bank of India had recently cautioned against these trades. “ The increased complexities of algo coding and reduction in latency due to faster communication platforms need focused monitoring, as they may pose risks in the form of increased possibilities of error trades and market manipulation,” it had said in June. S...