One of Wall Street’s most well-known bears, Marko Kolanovic, is leaving JPMorgan Chase.

According to a person with knowledge of the situation, the bank’s co-heads of sales and research said in an email to the staff that Kolanovic is planning to leave after 19 years at the bank and that Hussein Malik will now be the firm’s sole head of global research. Another email, sent by Malik, said that Dubravko Lakos-Bujas will lead the markets strategy team and become the bank’s chief markets strategist.