India’s securities regulator plans to boost its surveillance systems to better detect complex trading strategies after taking action against high-speed trading giant Jane Street Group for alleged market manipulation.

At the heart of the controversy is Jane Street’s aggressive trading in the derivatives (futures) segment, where the firm executed trades designed not just to profit, but to sway the market itself. Here's how.

On Monday, futures and options (F&O) turnover on the NSE was Rs 91.4 trillion, a 26 per cent drop from the average of the previous 12 Mondays