He explains how a stock is like a fable, a bond, and a guess. Plus, he tells of his past mistakes, such as not buying FNMA stock when he had the perfect chance. He recommends keeping a sheet that allows you to make only 20 purchases over your lifetime. That way, you will be picky and load up on a good thing. Buying a little of a great opportunity is like doing almost nothing, he says. From 2001 at the U of Georgia, to MBA students.