📖Benjamin Graham

P/B Ratio Standard

🌿 Intermediate★★★★★

Only buy stocks priced at no more than 1.5 times book value to ensure a tangible asset backing. Book value provides asset backing; a ratio above 1.5x indicates paying a premium for intangible assets. Calculate the price-to-book ratio (P/B) and identify stocks with a P/B < 1. Ideally, these stocks should also meet both the P/E and P/B criteria simultaneously. The stock price should not exceed 1.5 times the book value. Key insight: Book value represents the accounting floor of a company's worth. Start with a minimal checklist: Do I have conviction in my analysis?; Am I trusting my knowledge?; Can I act independently?.

  • Do I have conviction in my analysis?
  • Am I trusting my knowledge?
  • Can I act independently?
  • Build knowledge before conviction

Avoid misuse: For some industries, book value is not a significant metric.

💬

Current price should not be more than 1.5 times the book value last reported.

— _The Intelligent Investor_，1949

🏠 Everyday Analogy

Buying stocks is like buying a second-hand house. If the renovation cost 1 million, you should offer no more than 1.5 million. Beyond that price, no matter how beautiful the house is, you might just be paying for someone else’s excessive upgrades. The price-to-book ratio is the ruler that helps you judge whether you’re getting your money’s worth.

📖 Core Interpretation

The stock price should not exceed 1.5 times the book value.
💎 Key Insight：Book value represents the accounting floor of a company's worth. Graham's 1.5x ceiling ensures you are not paying a large premium over tangible assets. This criterion is especially protective in downturns, when market sentiment collapses and only asset backing prevents catastrophic losses.

AI Deep Analysis

Get personalized insights and practical guidance through AI conversation

❓ Why It Matters

Book value provides asset backing; a ratio above 1.5x indicates paying a premium for intangible assets.

🎯 How to Practice

Calculate the price-to-book ratio (P/B) and identify stocks with a P/B < 1.5. Ideally, these stocks should also meet both the P/E and P/B criteria simultaneously.

🎙️ Master's Voice

Have the courage of your knowledge and experience.
Graham encouraged conviction in well-researched ideas. If your analysis is sound, trust it even when others disagree.

⚔️ Practical Guide

✅ Decision Checklist

  • Do I have conviction in my analysis?
  • Am I trusting my knowledge?
  • Can I act independently?

📋 Action Steps

  1. Build knowledge before conviction
  2. Trust your analysis
  3. Act on well-researched ideas

🚨 Warning Signs

  • No conviction
  • Following others
  • Doubting sound analysis

⚠️ Common Pitfalls

✕For some industries, book value is not a significant metric.
✕Consider the industry-specific characteristics.

📚 Case Studies

1
Post-Crisis Bank Recovery (2009)
Large U.S. bank traded below book value after 2008 crisis. Graham-style investors screened for strong capital ratios and consistent earnings history despite temporary losses.
✨ Outcome：Bought at ~0.5x P/B; as credit fears eased, valuation moved toward book, producing strong multi‑year gains.
2
European Insurer Re-Rating (2012)
Major European insurer traded around 0.6x P/B amid eurozone debt fears. Balance sheet stress-tested and reserves examined using conservative Graham standards.
✨ Outcome：Dividend maintained and solvency improved; market gradually re-rated shares closer to tangible book, yielding solid double-digit annualized returns.

📌 Save this principle as your rule

One click to drop it into your personal rule library — every future trade will be scored against it.

See how masters handle real scenarios?

30 real investment dilemmas answered by legendary investors

Explore Scenarios →