Jamie Dimon, chairman and chief executive of JP Morgan Chase, sees opportunities to gain market share in most of the bank’s business lines except investment banking, according to an analyst who met him and the bank's new co-chief operating officer.

Jeffery Harte, principal at Sandler O'Neill + Partners, said in a report today that he had met with Dimon and Matt Zames, previously the head of fixed-income trading and current head of the chief investment office and mortgage capital markets, who was named co-chief operating officer of the whole firm last Friday.