Bloomberg reported that JPMorgan Chase investors risk shortening Jamie Dimon’s tenure as CEO if they appoint a separate chairman to help lead the bank, citing Charles Peabody, an analyst at Portales Partners.

The article said that calls for Dimon to give up the chairmanship have been building since the bank disclosed risk-control lapses on derivatives bets last year that fueled more than $6.2 billion in losses.

To read the entire Bloomberg story, click here.