India's markets regulator has widened an investigation into alleged market manipulation by U.S. securities trading firm Jane Street to include other indexes and exchanges, a source familiar with the matter said.

The lawsuit alleged that the traders had stolen a “ highly valuable, unique, and proprietary ” trading strategy, which was quickly revealed to revolve around India’s booming options market. Jane Street and Millennium settled the lawsuit in December, but judging from SEBI’s report it has cast a long (and expensive) shadow.

India has banned the firm from the country’s financial markets and said it would seize around $570 million in profit for allegedly fraudulent trades.

Jamie Smith and Harry Brook continued to frustrate India in the second session of the third day as England went to Tea in a commanding position.