Jamie Dimon has been at the helm of JPMorgan Chase since 2005. As the largest bank in the United States, it manages nearly $3 trillion — more than the gross domestic product of several countries. Dimon is also the longest-serving chief executive on Wall Street. “It is a scary place to be,” he told Marketplace’s Kai Ryssdal. Ryssdal spoke with Dimon about a wide range of issues, including interest rates, wages and the financial crisis.