Capping the size of American banks won't eliminate the needs of big businesses; it will force them to turn to foreign banks that won't face the same restrictions.

One of the issues with some of these lenders is going to be, where will their provider of credit be when there's a crisis? That's why some of these smarter services, to support their operations, are courting more permanent capital. They want a source of longer-term funding that can survive a crisis.

My father and grandfather were stockbrokers, and they would actually take stock certificates from a vault, give it to a runner, and send it to another vault. Then somebody said, "Let's digitize it and have one vault." Now the DTCC clears and settles almost everything, and the cost of doing a trade is a tenth of what it was before.

We take smaller companies and middle-sized companies, all around the world, and we do currency exchange for them; we raise bonds and equities for them; and we do inventory finance, trade finance, and custody of assets.

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.

Our investment bank looks like it does because its customers like our expansive network and want to do equity, debt, M&A, custody, move money, deposit money, et cetera.

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.