📖Benjamin Graham

Net-Net Selection Criterion

🌳 Advanced★★★★☆

Apply strict balance sheet tests before buying. Without process, there is no reliable feedback loop. Structured execution and review improve decision quality over time. Run a decision loop of research, thesis, execution, and post-mortem; document assumptions and update playbooks with evidence, not hindsight bias. Benjamin Graham advocates a repeatable process: define criteria, execute consistently, and review decisions against evidence. Process quality drives outcome consistency. Key insight: Financial conservatism protects against permanent capital loss. A process is like a pilot checklist: discipline prevents simple mistakes when pressure rises and keeps outcomes more repeatable.

Avoid misuse: Having opinions without execution criteria

💬

We suggested as a minimum requirement that the total equity be at least half the total capitalization, and that total current assets should be at least equal to total current liabilities.

— _The Intelligent Investor_，1949

🏠 Everyday Analogy

A process is like a pilot checklist: discipline prevents simple mistakes when pressure rises and keeps outcomes more repeatable.

📖 Core Interpretation

Benjamin Graham advocates a repeatable process: define criteria, execute consistently, and review decisions against evidence. Process quality drives outcome consistency.
💎 Key Insight：Financial conservatism protects against permanent capital loss.

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❓ Why It Matters

Without process, there is no reliable feedback loop. Structured execution and review improve decision quality over time.

🎯 How to Practice

Run a decision loop of research, thesis, execution, and post-mortem; document assumptions and update playbooks with evidence, not hindsight bias.

⚠️ Common Pitfalls

✕Having opinions without execution criteria
✕Reviewing outcomes but not decisions
✕Abandoning rules during volatility spikes

📚 Case Studies

1
Net-Net Bargains in Depression (1932)
During the Great Depression, Graham bought stocks trading below net current asset value, including undervalued industrials and utilities.
✨ Outcome：Many positions doubled or more as conditions normalized, validating deep value, balance-sheet-based quantitative methods.
2
Dot-com Bubble Valuation Discipline (1999)
Graham-style analysis rejects profitless tech stocks despite market euphoria, focusing on established firms with strong earnings and low P/E ratios.
✨ Outcome：Portfolio avoids 2000–2002 crash losses and later outperforms broad tech-heavy indices over the decade.

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