“One filter that’s useful in investing is the simple idea of opportunity cost. If you have one opportunity that you already have available in large quantity, and you like it better than 98 percent of the other things you see, well, you can just screen out the other 98 percent because you already know something better. So the people who have a lot of opportunities tend to make better investments than people that don’t have a lot of opportunities. And people who have very good opportunities, and using a concept of opportunity cost, they can make better decisions about what to buy. With this attitude, you get a concentrated portfolio, which we don’t mind.”
—Charlie Munger.
