Jamie Dimon, de J.P. Morgan:
But the success of Dimon and his crew seems to refute the "too big to manage" hypothesis, and in any case, Dimon doesn't buy the whole concept. "In every business, some huge companies are successful and others aren't," he says. To Dimon the rich flow of information from different corners of the bank, like the signal from servicing that warned him about subprime, is a major advantage. "We have a gold mine of knowledge, but you have to manage it well," he says, "so every one of our businesses benefits from it." Other successful models will emerge, but for now Dimon has the best game plan - and don't forget, the best team to go with it.