Success in investing doesn’t correlate with I.Q. Once you are above the level of 25; once you have ordinary intelligence, what you need is the temperament to control the urges that get other people into trouble in investing.
If you've got a good enough business, if you have a monopoly newspaper, if you have a network television station - I'm talking of the past - you know, your idiot nephew could run it. And if you've got a really good business, it doesn't make any difference.
My rather puritanical view is that any investment manager, whether operating as broker, investment counselor of a trust department, investment company, etc., should be willing to state unequivocally what he is going to attempt to accomplish and how he proposes to measure the extent to which he gets the job done.
Asset values and earning power are the dominant factors affecting the valuation of a controlling interest in a business. Market price, which governs valuation of minority interest positions, is of little or no importance in valuing a controlling interest.
Our future rates of gain will fall far short of those achieved in the past. Berkshire's capital base is now simply too large to allow us to earn truly outsized returns. If you believe otherwise, you should consider a career in sales but avoid one in mathematics.