Remco Lenterman, the outspoken chairman of one of Europe's most influential lobby groups for proprietary traders, is stepping down from the role he has held since the body's formation in 2011. The departure comes at a time of intense debate over market structure and the role of high-frequency trading firms.

Lenterman's decision to step down from the Futures Industry Association's European Principal Traders Association in Amsterdam comes after his departure from HFT firm IMC Financial Markets, where he was a managing director.