Some Rules for Stock Success

Morningstar's Patrick Dorsey's new book lays down the guidelines. Among his tips: Never leave too many eggs in one basket

One way to identify a good candidate for your investment money is to see if the company has an "economic moat" -- something that strongly distinguishes it from the competition and protects its franchise. That's one of the principles enunciated by Patrick Dorsey, director of stock analysis for Morningstar, in his new book, The Five Rules for Successful Stock Investing.

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