The Warren Buffett Portfolio book club questions

1. 1.

   Hagstrom argues that diversification often reflects ignorance rather than wisdom. Do you find that persuasive, or does it feel like rationalization for concentrated risk?

2. 2.

   How many businesses do you think you could genuinely understand well enough to bet a large portion of your net worth on them?

3. 3.

   The book was published in 1999. How has the case for concentrated stock-picking aged against the rise of low-cost index investing?

4. 4.

   What does 'understanding a business' actually mean in practice? What would you need to know to feel confident about a ten-year holding commitment?

5. 5.

   Hagstrom describes the psychological challenge of holding through volatility. Have you experienced a situation where your analytical conviction conflicted with the feeling of watching a position fall? What did you do?

6. 6.

   Buffett's management criteria include candor and rationality in capital allocation. How would you assess those qualities in a CEO you haven't met?

7. 7.

   The book argues that a truly great business held for decades outperforms almost anything else. What makes a business great enough to hold forever?

8. 8.

   Owner earnings is a more conservative measure than reported GAAP earnings. Why do most investors and analysts focus on GAAP earnings instead?

9. 9.

   Focus investing requires accepting that your portfolio will look very different from the market in any given year. How much tracking error would you be able to live with?

10. 10.

    Keynes reportedly lost most of his investors' capital before finding his concentrated approach. How do you think about the relationship between conviction and accountability when managing others' money?

11. 11.

    Hagstrom includes Coca-Cola and Gillette as case studies. What would modern equivalents look like, and how would you identify them?

12. 12.

    If you had to pick five businesses to hold for twenty years starting today, what criteria would you use, and would you actually trust your own judgment enough to execute?

How to run the discussion

• Pick six to eight, not all of them. An hour of real discussion covers fewer questions than anyone expects, and racing the list is what makes a book club feel like homework.
• Open with what people noticed, not what they concluded. Asking for a verdict first hardens opinions before anyone has heard each other.
• Let the disagreement run. The questions below that split a room are the ones worth the time; the ones everyone answers the same way can be skipped.
• Ask the quiet person a specific question. A direct, narrow question is far easier to answer than an open invitation to contribute.