U.S. Value Stock Investing: A Complete Guide to Benjamin Graham’s Stock Selection Method

TL;DR： The Graham stock-picking method filters undervalued U.S. stocks using seven quantitative criteria. Its core concept, the “margin of safety,” emphasizes buying when price is below intrinsic value to reduce investment risk. While the method requires adaptation in today’s markets, its philosophy remains an important reference for long-term investing.

Benjamin Graham (1894–1976), widely recognized as the “father of value investing,” profoundly influenced countless investors, including his most famous student, Warren Buffett. For Hong Kong investors seeking undervalued opportunities in the U.S. stock market, understanding the Graham method is an important first step on the path to rational investing.

What Are U.S. Value Stocks

“U.S. value stocks” are shares in the U.S. market whose prices are low relative to company fundamentals. These stocks typically trade at price-to-earnings (P/E) or price-to-book (P/B) ratios below the market average, while maintaining solid financial health and sustained profitability. Value investors focus on buying below intrinsic value, seeking returns as prices revert toward fair value.

Newcomers to U.S. equities can consult the Beginner’s Guide to U.S. Stock Investing to learn about account opening and basic trading rules.

Graham’s Seven Stock Selection Criteria

In The Intelligent Investor, Graham proposed seven quantitative criteria for “defensive investors,” designed to filter for companies with sound financials and reasonable valuations.

1. Sufficient company size: Select companies with annual sales above a certain threshold to ensure resilience in economic downturns.

2. Adequate financial liquidity: The current ratio (current assets ÷ current liabilities) should be at least 2, and long-term debt should not exceed net current assets.

3. Earnings stability: The company should have reported positive earnings every year for the past ten years, indicating long-term sustainability.

4. Uninterrupted dividend record: The company should have paid dividends for twenty consecutive years, indicating robust cash flow. See also Four Financial Metrics for Assessing Dividend Sustainability for further evaluation.

5. Earnings growth: Earnings per share (EPS) should have grown by at least one-third over the past ten years.

6. Reasonable P/E ratio: The P/E ratio, based on the average EPS over the past three years, should be below 15x.

7. Low P/B ratio: The P/B ratio should be below 1.5x, and the product of P/E and P/B should not exceed 22.5.

Tip: In modern markets, U.S. stocks that satisfy all seven criteria simultaneously are relatively rare. Use these criteria as a screening framework rather than rigid requirements that must all be met.

Margin of Safety: The Core Safeguard of Value Investing

The “margin of safety” is the most central concept in Graham’s framework. It is the gap between a stock’s intrinsic value and its purchase price. For example, if a stock’s intrinsic value is estimated at USD 20 and an investor buys at USD 14, the margin of safety is 30% (hypothetical illustration). This buffer compensates for potential valuation errors and offers some protection in market downturns.

Graham also proposed the “Graham Number” as a simple valuation tool:

Graham Number = √(22.5 × Earnings per Share × Book Value per Share)

If the market price is below the Graham Number, the stock may offer a margin of safety and merit further research. The Graham Number is an aid, not a buy guarantee; investors should still evaluate comprehensively with other factors.

Application and Limitations in Today’s Market

A mechanical application of Graham’s original criteria has not necessarily outperformed the S&P 500 in recent years, and past performance does not represent future results. In his later years, Graham also acknowledged that companies fully meeting all his conditions were increasingly hard to find.

Many modern investors therefore make moderate adjustments—for example, shortening the earnings stability requirement to five years, the dividend record to two years, and incorporating contemporary financial ratios. More importantly, they preserve the core spirit: buy below intrinsic value, maintain a sufficient margin of safety, and avoid chasing stocks amid euphoric market sentiment.

Investors should also watch for “value traps,” where low valuations reflect ongoing business deterioration rather than temporary mispricing. You can regularly track U.S. market data and leverage AI-assisted analysis of financial reports to improve research efficiency.

FAQs

Does a low P/E always mean a stock is cheap?

Not necessarily. A low P/E may reflect market expectations of declining future earnings or structural challenges facing the industry. The Graham method calls for a multi-metric assessment to avoid falling into a “value trap.”

How does the Graham method differ from Buffett’s approach?

Graham focused more on static asset value and quantitative metrics; building on that foundation, Buffett places greater emphasis on durable competitive advantages and management quality, and is willing to buy outstanding companies at reasonable prices and hold them long term. By widely cited accounts, roughly 85% of Buffett’s style derives from Graham’s philosophy, with the remainder influenced by growth investor Philip Fisher.

Can we still find stocks that meet Graham’s criteria today?

Yes, but it is harder than in Graham’s era. During market corrections or when individual companies face short-term headwinds, some valuations may approach Graham’s thresholds. Investors should use qualitative analysis to confirm that issues are temporary rather than structural.

Conclusion

Graham’s seven criteria and the margin of safety concept provide a disciplined quantitative framework. In uncertain markets, analyzing businesses with an owner’s mindset, seeking undervalued U.S. equities, valuing conservatively, and leaving a buffer are key to reducing investment risk.

Your choice of investment tools depends on your objectives, risk tolerance, market views, and experience. Whatever you choose, ensure you fully understand its mechanics, risk characteristics, and trading rules, and establish a robust risk management plan. You can learn more via Longbridge Academy or by downloading the Longbridge App.