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.

By Ira Dugal, Jayshree P Upadhyay and Scott Murdoch MUMBAI (Reuters) -Indian regulators barred U.S. securities trading company Jane Street from the local market and seized $567 million of its funds, saying an investigation found it manipulated stock indices through positions taken in derivatives.

India has barred Jane Street from the country’s financial markets and said it would seize around $570 million that the U.S. securities firm made from allegedly fraudulent trades.