Anytime anybody offers you anything with a big commission and a 200-page prospectus, don't buy it. Occasionally, you'll be wrong if you adopt "Munger's Rule." However, over a lifetime, you'll be a long way ahead - and you will miss a lot of unhappy experiences.

With Congress and the S.E.C. so heavily peopled by lawyers, and with lawyers having been so heavily involved in drafting financial disclosure documents now seen as bogus, there was a new "lawyer" joke every week. One such was: "The butcher says 'the reputation of lawyers has fallen dramatically', and the check-out clerk replies: "How do you fall dramatically off a pancake?

I don't want to sell credit to people who are going to hurt themselves with it. You should only sell products that are good for the people who use them. Some disagree with this, but I know I'm right. That is to say, you're talking to a Republican who admires Elizabeth Warren.

The investment game always involves considering both quality and price, and the trick is to get more quality than you pay for in price. It's just that simple.

If you have competence, you know the edge. It wouldnt be a competence if you didnt know where the boundaries lie. Asking whether youve passed the boundary is a question that almost answers itself.

Black-Scholes is a know-nothing system. If you know nothing about value - only price - then Black-Scholes is a pretty good guess at what a 90-day option might be worth. But the minute you get into longer periods of time, it's crazy to get into Black-Scholes. For example, at Costco we issued stock options with strike prices of $30 and $60, and Black-Scholes valued the $60 ones higher. This is insane.

The stupid and dishonest accountants allowed the genie of totally inappropriate accounting to descend on derivatives books. And once this has happened - people get status, etc. - it's impossible to get it back into the bottle.