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#10 Michael Mauboussin: Expectations Investing

Investing by the Books

CHAPTER

Buying or Selling a Stock?

Step one is to create scenarios for your most important value trigger. And then we want to assign probabilities to those scenarios coming to pass. Those probabilities should be, or can be very much informed by base rates. With those outcomes and probabilities, we generate an expected value. That's basically it. If it's cheap, you buy it, and if it's expensive, you sell it.

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