Derivatives are financial weapons of mass destruction.

Investors... can't pick stocks that are better than average. Stocks are a good thing to own over time. There's only two things you can do wrong: You can buy the wrong ones, and you can buy or sell them at the wrong time. And the truth is you never need to sell them.

We would do best in a market where everyone acted foolishly.

So some guy may know how to make money in cocoa beans, but I don't so I just let him have that. But it's got to be something I understand. It's got to be a business with fundamentally good economics. It's got to be a management that I like and trust and admire. And it's got to be a price that makes sense.

You get what I call the natural progression, the three Is. The innovators, the imitators, and the idiots.

It's a nightmare to administer some of this sort of thing, but I want to tell the shareholders of Berkshire, to the percent we own marketable securities or things for which there are market, even if those markets - I want to tell them what it's all about.

If some institution wants to sell you a billion dollars worth of mortgages, they might have to sell 100 million in the market, and then you'll buy the other 900 million on the same terms. Now, the very fact that this has been authorized or will be authorized, I hope, will firm up the market to some degree. And that's fine. But you don't want to have artificial prices being paid.