If we have a strength, it is in recognizing when we are operating well within our circle of competence and when we are approaching the perimeter.
Warren BuffettIf you know how to value businesses, it's crazy to own 50 stocks or 40 stocks or 30 stocks, probably because there aren't that many wonderful businesses understandable to a single human being in all likelihood. To forego buying more of some super-wonderful business and instead put your money into #30 or #35 on your list of attractiveness just strikes Charlie and me as madness.
Warren BuffettOnly buy something that you'd be perfectly happy to hold if the market shut down for 10 years.
Warren BuffettIf horses had controlled investment decisions, there would have been no auto industry.
Warren BuffettWide diversification is only required when investors do not understand what they are doing.
Warren BuffettNone of this means, however, that a business or stock is an intelligent purchase simply because it is unpopular; a contrarian approach is just as foolish as a follow-the-crowd strategy. What's required is thinking rather than polling. Unfortunately, Bertrand Russell's observation about life in general applies with unusual force in the financial world: "Most men would rather die than think. Many do."
Warren Buffett