What is Benjamin Graham's investing strategy?

Graham is the father of value investing. His 'Defensive Investor' framework from The Intelligent Investor (1949) demands: P/E below 15, P/B below 1.5, current ratio above 2, debt-to-equity below 1, profitability in each of the last 5 years, and some earnings growth. Graham's bar is intentionally low so any rule-following retail investor can apply it.

What is the difference between Graham and Buffett?

Graham was Buffett's mentor and codified the value-investing rulebook. Graham bought cheap stocks regardless of business quality. Buffett evolved this in the 1970s - under Munger's influence - toward 'wonderful businesses at fair prices.' Same value-investing philosophy, but Buffett demands quality first; Graham accepted mediocre businesses if the price was deep enough.

Does Graham's framework still work today?

Strict Graham screens find very few stocks in modern markets (most quality businesses trade above 1.5× book). But the *principles* still anchor every disciplined value framework: margin of safety, quantitative bar, business profitability over decades. Modern adaptations (Greenblatt's Magic Formula, Smith's Fundsmith) all trace back to Graham.

Who should use Graham's framework?

Risk-averse investors who want a rules-based screen they can apply without judgment. Graham is the easiest framework to apply mechanically - every criterion is a number you can pull from a 10-K. If a stock passes all six criteria, it qualifies. The hard part is that very few stocks pass in 2026's market, so the framework also forces patience.

Defensive deep-value investing

Benjamin Graham's Investing Strategy

Benjamin Graham - Buffett's mentor and the father of value investing - codified the 'Defensive Investor' framework in The Intelligent Investor. The bar is low, but each criterion is non-negotiable.

Last reviewed: January 1, 2026