I think corporate managers should learn to be better investors because it would make them better managers.

It's dangerous to short stocks.

To some extent, stocks are like Rembrandts. They sell based on what they've sold in the past. Bonds are much more rational. No-one thinks a bond's value will soar to the moon.

Bull markets go to people's heads. If you're a duck on a pond, and it's rising due to a downpour, you start going up in the world. But you think it's you, not the pond.

A director who gets $150,000 per year from a company and needs the money is not independent.

The cash register did more for human morality than the Congregational Church. It was a really powerful phenomenon to make an economic system work better, just as, in reverse, a system that can be easily defrauded ruins a civilization. A system that's very hard to defraud, like a cash register, helped the economic performance of a civilization by reducing vice, but very few people within economics talk about it in those terms.

The name of the game is continuing to learn. Even if you're very well trained and have some natural aptitude, you still need to keep learning.