Because of that [Brexit], you're going to have slow growth and, unfortunately, while there may not be huge volatility, there will be volatility.

The best thing to do is muddle through and maybe, over time, create a solution of that, if someone really wanted to exit, the legal basis on which you could exit. Because right now there almost doesn't exist one.

Most CEOs are patriotic and most CEOs can see the problems in front of them, and they want to do something about it. We don't always agree about the ways and means, but the objective? We're totally together.

I also think you have to be very careful. I mean, the heritage of our company is very strong, and building some of these businesses into leading players is extremely tough. You and I can both build a trading business, and it looks like you're doing OK, and it looks like I'm doing OK. But, really, I am, and you aren't. It comes down to the quality of clients, quality of systems, quality of risk controls.

From my point of view, the American financial system - including banks and investment banks - is far safer because of capital and liquidity requirements. Despite all the turbulence so far this year, I don't think anyone's questioning our system. And that, obviously, is a good thing.

You've seen certain credit type products that are going to be in nonbanks, like sophisticated CLO [collateralized loan obligation] tranches and stuff where the capital charge is so high that a bank simply will not own it. Someone will buy it, hedge it, trade it. But it won't typically be a bank.

I haven't studied it deeply, but the American banks started the crisis with far more capital and what I would call "good liquidity." The riskiest funding is unsecured wholesale funding. It's the most fickle. Not repo, which the government focused on, too. Unsecured. JPMorgan Chase had almost none of that - virtually zero.