A Wall Street stockbroker, Dimon's father, Theodore, encouraged all three of his sons to learn more about the markets, but only Jamie leaned in. By high school, Dimon's idea of leisure reading was anything but typical: he spent his spare time reading books, papers, and reports on psychology, economics, and accounting. He went on to graduate from Tufts University before earning an MBA from Harvard Business School. After graduation, Dimon landed his first Wall Street role as an assistant to then-American Express president Sanford "Sandy" Weill. Today, Dimon is one of the only remaining Wall Street CEOs still in place from the 2008 financial crisis.