Buying a company without having sufficient knowledge of it may be even more dangerous than having inadequate diversification.

Investors should be skeptical of history-based models. Constructed by a nerdy-sounding priesthood using esoteric terms such as beta, gamma, sigma and the like, these models tend to look impressive. Too often, though, investors forget to examine the assumptions behind the models. Beware of geeks bearing formulas.

A fool with a plan can outsmart a genius with no plan any day.

I will stand up for what I believe and for what I have always believed: Every person has a right to be rich in this country and I want to help them get there.

I just read and read and read. ... I have always enjoyed reading.

The stock market is filled with individuals who know the price of everything, but the value of nothing.