When it comes to value investing, few names are as revered as Benjamin Graham. Often referred to as the “father of value investing,” Graham was not only Warren Buffett’s mentor, but also the mind behind a formula that has stood the test of time: the Benjamin Graham Formula for estimating the intrinsic value of a stock.
In this post, we’ll explore:
- The origins of the Graham formula
- How it evolved over time
- How to apply it with real examples
- And how you can use our Benjamin Graham Calculator to simplify your analysis
Who Was Benjamin Graham?
Benjamin Graham (1894–1976) was a renowned economist, investor, and professor at Columbia Business School. His books Security Analysis (1934) and The Intelligent Investor (1949) laid the foundation for modern value investing.
Graham emphasized investing in businesses that trade below their intrinsic value, focusing on margin of safety, solid fundamentals, and a long-term outlook.
His teachings deeply influenced legendary investors like Warren Buffett, Seth Klarman, and Joel Greenblatt.
The Origins of the Graham Formula
In his 1974 revision of The Intelligent Investor, Graham proposed a simple formula for estimating the intrinsic value of a stock based on earnings and growth:
Original Formula:
Intrinsic Value = EPS × (8.5 + 2g)
Where:
- EPS = Earnings Per Share (Trailing Twelve Months)
- g = Expected Annual Growth Rate (in %)
- 8.5 = Graham’s assumed P/E ratio for a no-growth company
This formula allowed investors to quickly estimate how much a stock might be worth based on its earnings power and projected growth.
The Revised Graham Formula
Graham later acknowledged that the original formula didn’t account for interest rates or inflation. So he introduced an updated version:
Revised Formula:
Intrinsic Value = [EPS × (8.5 + 2g) × 4.4] / Y
Where:
- 4.4 = Average corporate bond yield in Graham’s era
- Y = Current AAA corporate bond yield
This adjustment made the formula more flexible across different interest rate environments.
Why the Graham Formula Still Matters
While the formula is not a one-size-fits-all tool, it offers:
- A baseline valuation for conservative investors
- A quick screen for undervalued stocks
- A foundation for deeper analysis
It forces investors to focus on earnings and growth rather than market hype. In today’s world of meme stocks and volatility, Graham’s approach offers clarity.
As Warren Buffett puts it:
“The market is there to serve you, not to guide you.”
How to Use the Benjamin Graham Formula in Practice
Let’s walk through an example using the revised formula.
Example: ABC Corp
- EPS: $5
- Expected Growth Rate (g): 6%
- Current AAA Bond Yield (Y): 5.5%
Step 1:
Intrinsic Value = [5 × (8.5 + 2×6) × 4.4] / 5.5
Step 2:
= [5 × (8.5 + 12) × 4.4] / 5.5
= [5 × 20.5 × 4.4] / 5.5
= 451 / 5.5
= $82
If the current market price of ABC is $60, the formula suggests it’s undervalued by 27%.
Want to skip the math? Use our Benjamin Graham Calculator to plug in the values and get the result instantly.
Pros and Cons of the Graham Formula
✅ Pros:
- Easy to use
- Requires only a few inputs
- Encourages a long-term mindset
- A great first-pass filter for fundamental investors
❌ Cons:
- Sensitive to estimated growth rate (g)
- Doesn’t factor in debt, cash, or industry-specific nuances
- Not suitable for companies with negative or volatile earnings
This is why Graham himself emphasized using the formula only as a guideline, not an absolute rule.
Tips for Using the Formula More Effectively
- Be conservative with growth assumptions: Aim low, avoid optimism.
- Use trailing 12-month EPS: Avoid forward earnings unless you’re confident in their accuracy.
- Cross-check with other models: Like discounted cash flow (DCF) or EV/EBITDA comparisons.
- Filter for quality companies: Strong balance sheets, consistent earnings, and high return on capital.
Who Should Use the Graham Formula?
- Long-term value investors
- Beginners learning valuation principles
- Analysts building screening tools
- Conservative investors looking for margin of safety
It’s especially useful for:
- Dividend-paying blue chips
- Mature, stable businesses
- Low-volatility sectors (e.g., consumer staples, industrials)
Final Thoughts
The Benjamin Graham Formula is more than a relic of investing history—it’s a timeless framework that still works for investors who value discipline, fundamentals, and long-term thinking.
While the formula isn’t perfect, it offers a rational approach in an often irrational market. Whether you use it as a starting point or a core part of your valuation toolkit, it belongs in every investor’s arsenal.
Want to give it a try? Head over to our Benjamin Graham Calculator and see what your favorite stocks are really worth.
Have a valuation story using the Graham Formula? Drop it in the comments—we’d love to hear how you use it in your investing journey.
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