About this episode

In this episode, Stephen and Andrew discuss the importance of understanding your circle of competence in investing and how to avoid common pitfalls.

Circle of competence” sounds fancy, but it’s really just this: know what you know, and know what you don’t. In this episode, Stephen and Andrew break down how most investing mistakes happen when you get confident in a business you don’t truly understand—even if the company feels familiar on the surface. You’ll learn how to define your circle of competence, how to expand it safely over time, and how to avoid common traps like investing in “cool” companies or getting swept up in market narratives. Stephen also shares a simple pen-and-paper method to quickly test whether a company is truly inside your circle. What You Will Learn What a “circle of competence” actually means (and why it matters for stock picking) How to separate familiarity with a company from understanding the business model How moats, competition, and industry dynamics affect long-term results A simple checklist to test whether a company is inside your circle of competence How to expand your circle safely (sleep on decisions, start small, watch your emotions) Timestamps 00:00 — Why circle of competence matters 01:51 — Business understanding & where your investor advantages are 02:59 — “Know what you don’t know”…

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