The optimum portfolio depends on the various expectations of choices available and the degree of variance in performance which is tolerable. The greater the number of selections, the less will be the average year-to-year variation in actual versus expected results. Also, the lower will be the expected results, assuming different choices have different expectations of performance.
Warren BuffettI have a house that I bought 55 years ago. It's warm in the winter; it's cool in the summer. It has everything I wanted, plus it has all kinds of good memories. Like my kids, I have good thoughts about that. I can't imagine living any better.
Warren BuffettI look for businesses in which I think I can predict what they're going to look like in ten to fifteen years time. Take Wrigley's chewing gum. I don't think the internet is going to change how people chew gum.
Warren Buffett