And then there were two. JPMorgan elevated Troy Rohrbaugh and Doug Petno to co-presidents on Thursday, the clearest sign yet that they are leading the race to replace CEO Jamie Dimon. The announcement comes after more than a decade of speculation and a rotating cast of succession candidates. Even now, the field could keep shifting until the day Dimon steps down. While both are held in high esteem at JPMorgan, Petno and Rohrbaugh have distinct strengths — the former is known for his charm and client relation ...