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.

Sebi imposed a temporary trading ban on the US-based firm and ordered the seizure of Rs 4,840 crore, citing 'an intentional, well-planned and sinister scheme'

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.