“I try to stress the idea that a portfolio should have at least ten companies, with one or two providing a fairly good dividend,” says Ms. Morrissey. “But before my students can put any stock in the portfolio, they have to explain exactly what the company does. If they can’t tell the class the service it provides or the products it makes, then they aren’t allowed to buy. Buying what you know about is one of our themes.” Buying what you know about is a very sophisticated strategy that many professionals have neglected to put into practice.
