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#10 Michael Mauboussin: Expectations Investing

Investing by the Books

CHAPTER

What Is a Pre-Mortem?

A pre-mortem is actually a third exercise. It was developed by a psychologist named Gary Klein. What we all do, and we presume this investment, we made it and it turned out poorly. And then what each of us does is independently write down the story as to why this investment turns sour. The pre-mortem for reasons that has some sort of intellectual, interinteresting psychological components to it.

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