Afford Anything

10 Rules for Building a Portfolio That Actually Works for Your Life, with Cullen Roche

77 snips
Jan 31, 2026
Cullen Roche, founder and CIO of Discipline Funds and pragmatic investing commentator, shares 10 portfolio principles. He reframes buying stocks as reallocating savings. Short takes cover behavioral pitfalls like panic-selling and FOMO. He explains diversification, cost and tax importance, the 3–10 year allocation challenge, and concrete tactics like the 351 exchange and defined-duration matching.
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INSIGHT

You're A Saver, Not A Direct Investor

  • Buying stocks on the secondary market reallocates your savings rather than funding production.
  • Treat portfolio building as a long-term, prudent process, not a get-rich scheme.
INSIGHT

You Are Your Portfolio's Biggest Risk

  • Behavioral biases make you your portfolio's biggest threat across market cycles.
  • FOMO in rallies can be as destructive as fear in crashes because it drives performance-chasing.
ADVICE

Limit Stock Picking To Scratch The Itch

  • Keep active stock-picking to a small portion if it helps you stay engaged, e.g., 5–10%.
  • Use that 'fun money' to scratch the itch while the rest stays low-cost and diversified.
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