📖Benjamin Graham

Earning Power

🌳 Advanced★★★★★

A company's demonstrated ability to generate consistent earnings is the primary driver of its stock valuation. In the long run, stock prices follow earnings, as profitability determines intrinsic value. Analyze the profit trends over the past 5-10 years to assess the stability and growth of earnings. Profitability is the core element of stock valuation. Key insight: Earning power, defined as the expected average earnings under normal business conditions, is Graham's preferred valuation anchor. Start with a minimal checklist: What margin of safety does this price offer?; Am I paying too much?; Is the discount sufficient?.

  • What margin of safety does this price offer?
  • Am I paying too much?
  • Is the discount sufficient?
  • Calculate intrinsic value first

Avoid misuse: Profits from a single year may not be representative.

💬

Earning power is the key element in the valuation of a common stock.

— _Security Analysis_，1934

🏠 Everyday Analogy

Just as one evaluates character in a matchmaking process, buying stocks requires assessing a company's ability to generate profits. No matter how handsome or wealthy a person may be, poor character ultimately makes them unreliable; similarly, no matter how popular or sharply a stock rises, without sustainable profitability, it is merely a castle in the air. A truly good company is like a time-honored restaurant—regardless of external changes, it consistently delivers value to customers and creates profits for shareholders.

📖 Core Interpretation

Profitability is the core element of stock valuation.
💎 Key Insight：Earning power, defined as the expected average earnings under normal business conditions, is Graham's preferred valuation anchor. It should be measured over a full business cycle, not a single exceptional year. Companies with stable, predictable earning power command higher valuations than those with volatile or unproven earnings.

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❓ Why It Matters

In the long run, stock prices follow earnings, as profitability determines intrinsic value.

🎯 How to Practice

Analyze the profit trends over the past 5-10 years to assess the stability and growth of earnings.

🎙️ Master's Voice

The margin of safety is always dependent on the price paid.
Graham taught that no investment is inherently safe or risky—it depends on price. A great company at too high a price is a bad investment.

⚔️ Practical Guide

✅ Decision Checklist

  • What margin of safety does this price offer?
  • Am I paying too much?
  • Is the discount sufficient?

📋 Action Steps

  1. Calculate intrinsic value first
  2. Demand meaningful discount
  3. Walk away if margin is insufficient

🚨 Warning Signs

  • Paying fair value
  • No margin of safety
  • Hoping for higher prices

⚠️ Common Pitfalls

✕Profits from a single year may not be representative.
✕Focus on long-term averages and trends.

📚 Case Studies

1
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.
2
Post-Crisis Blue-Chip Bargains (2009)
After the 2008 crash, an investor applies Graham’s earning power and margin-of-safety tests to buy profitable large caps at historically low earnings multiples.
✨ Outcome：Over the following 5–7 years, holdings recover strongly, producing substantial absolute gains and market-beating risk-adjusted returns.

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