it is critically important that you think seriously about what exactly a focus investing approach entails: Do not approach the market unless you are willing to think about stocks, first and always, as part-ownership interests in businesses. Be prepared to diligently study the businesses you own, as well as the companies you compete against, with the idea that no one will know more about your business than you do. Do not even start a focus portfolio unless you are willing to invest a minimum of five years (10 years would even be better). Never leverage your focus portfolio. An unleveraged focus
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