The number one idea is to view a stock as an ownership of the business and to judge the staying quality of the business in terms of its competitive advantage. Look for more value in terms of discounted future cash-flow than you are paying for. Move only when you have an advantage.

Fancy computers are engaging in legalized front-running. The profits are clearly coming from the rest of us - our college endowments and our pensions. Why is this legal? What the hell is the government thinking? It's like letting rats into a restaurant.

The normal expectancy of the average investor - for example, the pension funds of AT&T or IBM - is 6% for a long time.

It would be nice if this [finding really cheap stocks] happened all the time. Unfortunately, it doesn't.

Knowing what you don't know is more useful than being brilliant.

Economics is in many respects the queen of the soft sciences. It's expected to be better than the rest. It's my view that economics is better at the multi-disciplinary stuff than the rest of the soft science. And it's also my view that it's still lousy.

I think that if you have a single payer system and an opt-out for people who want to pay more [for better service, etc.], I think it would be better - and I think we'll eventually get there. It wouldn't be better at the top - [our current system] is the best in the world at the top. But the waste in the present system is awesome and we do get some very perverse incentives.