JPMorgan Chase promotes Petno, Rohrbaugh to copresidents, setting up two more successors for Dimon

JPMorgan Chase promoted investment bankers Doug Petno and Troy Rohrbaugh to copresidents, positioning them as potential successors to CEO Jamie Dimon. Marianne Lake, a former top executive, will retire at year-end, ending speculation about her succession. The moves reflect the board's focus on developing leadership from commercial and investment banking ranks.