Companies that grow for the sake of growth or that expand into areas outside their core business strategy often stumble. On the other hand, companies that build scale for the benefit of their customers and shareholders more often succeed over time.

The Trump administration's economic agenda is the right agenda. Corporate taxes have been driving capital and brains and companies overseas for a decade. It has caused huge damage in investment and jobs and productivity. It was a mistake. We have to fix it. Counterintuitively, that usually helps middle-class wages, and lower-class wages, and job formation.

JP Morgan always has higher capital liquidity, that is partially to make up for mistakes and problems and obviously its a tough economy. We support an oversight committee, we supported some of the compensation, new compensation rules, though we already follow most of them. We support a lot of it.

You would expect to see that first in high-yield [debt], but it was in the most liquid thing in the world. So that, I think - it's a little bit of a warning that we've got to be prepared and just be careful.

Part of the reason some Japanese companies have underperformed financially was corporate governance and board structures.

I don't think you could have a banker serving in a major role in Washington in the next 10 years. I just don't think it's going to happen - it's just not politically feasible - so I don't spend much time thinking about it. Do I think I could do a good job? Maybe. It's possible.

Manipulating currencies is when you're going into the marketplace and buying something in large amounts to depress the value of the currency.