(4-hour Berkshire Q&A compilation > $200k MBA)
Core Investing Principles
• Keep it simple: Buy great businesses at a discount to intrinsic value. Logic + courage beats high IQ.
• Markets serve you, not instruct you – Ignore noise, fear, and crowd psychology.
• You only need a few great ideas in a lifetime. Concentrate on what you deeply understand (Circle of Competence).
• Opportunity cost is king: Always compare to your best alternative.
Risk & Psychology
• Be extremely risk-averse: Never risk what you have and need for what you don’t.
• Avoid leverage and complex derivatives – fat-tail risks can destroy you.
• Most mistakes come from emotion and self-deception. Study your own biases.
Practical Wisdom
• Diversification is often “asinine” – own wonderful companies at fair (or better) prices.
• Errors of omission (missing big opportunities) hurt more than errors of commission.
• Compensation & incentives matter hugely – align them properly or expect trouble.
• America’s economic engine remains powerful long-term. Focus on individual businesses, not macro predictions.
Bottom line:
Be rational, patient, and obsessive about avoiding big mistakes. Compound over decades by owning quality cheap and thinking like a business owner.
Bookmark the original video and watch it. Best investing education you’ll get for free.