What is Value Investing? 5 Core Principles from Buffett, Munger and Graham

August 22, 2024

This guide explores the historical philosophies of Warren Buffett and Benjamin Graham. It is a study of their mental models, not financial advice. Investing involves risk. Always consult a qualified financial advisor before making investment decisions.

For over 80 years, one philosophy has quietly outperformed nearly every other strategy in the stock market: Value Investing. It’s not a “get rich quick” scheme, and it has no complex algorithms. It’s a fundamental, rational approach to the market.

This philosophy was born with one man, Benjamin Graham, perfected by his student, Warren Buffett, and refined by Buffett’s partner, Charlie Munger. Together, these three men provided a complete masterclass on how to think rationally about money. Let’s explore the 5 core principles of their system.

Principles of Value Investing

Five timeless lessons from Warren Buffett, Charlie Munger, and Benjamin Graham.

Price vs. Value

“Price is what you pay; value is what you get.”

The central concept. “Mr. Market” is manic-depressive. Your job is to ignore the noise. Price is often irrational; Value is the stable worth of the business.

The “Margin of Safety”

“The central concept of investment is ‘margin of safety.’”

Buying a dollar for 50 cents. It’s an iron-clad defense against an unpredictable future. If your calculation is wrong, the discount protects you. Rule No. 1: Never lose money.

Wonderful Companies

“It’s far better to buy a wonderful company at a fair price…”

Don’t just buy cheap “cigar butts.” Focus on high-quality businesses with strong “economic moats” (brands, patents) that you can hold forever.

Be a “Learning Machine”

“I have known no wise people… who didn’t read all the time.”

Munger championed the “latticework of mental models.” Investing isn’t just math; it’s understanding psychology, history, and science.

Temperament is Key

“The most important quality for an investor is temperament, not intellect.”

High IQ doesn’t guarantee success if you are ruled by fear and greed. You must be ruthlessly patient and unemotional.

Value investing is a philosophy of rationality, patience, and independent thought. It’s a proven framework for building long-term wealth by thinking like a business owner, not a speculator.

If you want to dive deeper into the minds of these three legends, this analysis was inspired by the full collection in our book, 1101 Warren Buffett, Charlie Munger, and Benjamin Graham quotes. You can explore all 1101 insights in our complete volume, available now on Amazon. More than 1000 copies sold. As a bonus, in the final chapter, you will find the Summary of the Intelligent Investor written by Benjamin Graham! So, what are you waiting for? Buy on Amazon

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Building a business creates wealth, but managing that wealth requires a different skill set. To protect and grow what you have built, you should study the masters of capital in Investment Lessons from Soros, Lynch, and Dalio.

Value investing is about patience and discipline, traits that apply to more than just the stock market. These same virtues are the bedrock of personal growth, as outlined in Seven Fundamental Principles for Lasting Achievement.

1. Principle: Price is What You Pay, Value is What You Get

“Price is what you pay; value is what you get.” – Warren Buffett

This is the central concept of value investing. Benjamin Graham first explained this using his parable of “Mr. Market,” a manic-depressive partner who shows up every day offering to sell you his share of the business (or buy yours) at a wild, emotionally-driven price. Graham’s point? The price (the stock quote) is often irrational. The value (the actual, underlying worth of the business) is stable. The value investor’s job is to ignore the noise and buy only when the price is far below the value.

2. Principle: The “Margin of Safety”

“The central concept of investment is ‘margin of safety.’… You must buy at a price that gives you a margin of safety. People don’t know how right they are, so they must have a margin of safety.” – Benjamin Graham

This is Graham’s non-negotiable rule, and it’s the engine of the entire philosophy. A margin of safety simply means buying a dollar for 50 cents. It’s an iron-clad defense against a future you can’t predict. If your calculations of a company’s value are slightly wrong, or if the company hits a rough patch, the deep discount at which you bought the stock protects you from a permanent loss. As Buffett says, “Rule No. 1: Never lose money. Rule No. 2: Never forget rule No. 1.”

The Limits of Value Investing While powerful, this philosophy is not without critics. In the last decade, ‘Value’ has often underperformed ‘Growth’ strategies (like tech investing), leading some to argue that the definition of ‘value’ must evolve to include intangible assets like code and brand, rather than just factories and inventory.

3. Principle: Buy Wonderful Companies, Not Just Cheap “Cigars”

“It’s far better to buy a wonderful company at a fair price than a fair company at a wonderful price.” – Warren Buffett

This is the great evolution that Buffett and Munger brought to Graham’s ideas. Graham was famous for buying “cigar butts”—terrible companies that were so cheap they had “one good puff” left in them. Buffett and Munger realized it was much more profitable, and easier, to buy wonderful companies—those with a strong, durable “economic moat” (like a powerful brand or patent)—at a fair price and hold them forever.

4. Principle: Be a “Learning Machine”

“In my whole life, I have known no wise people… who didn’t read all the time – none, zero.” – Charlie Munger

Munger and Buffett are famous for spending most of their day (80% or more) just reading. Munger championed the idea of building a “latticework of mental models”—pulling ideas from psychology, history, science, and more. Value investing isn’t a simple formula. It’s a way of thinking, and the only way to get better at it is to constantly broaden your mind.

5. Principle: The Most Important Quality is Temperament

“The most important quality for an investor is temperament, not intellect… You need a temperament that neither derives great pleasure from being with the crowd or against the crowd.” – Warren Buffett

This is the hardest lesson. You can have the highest IQ in the world and be a terrible investor. Why? Because you’ll be ruled by fear and greed. Value investing requires a temperament that is ruthlessly patient (willing to do nothing for years) and unemotional (willing to buy when everyone else is panicking and sell when they are euphoric). It’s a test of character, not intelligence.

Value vs. Growth: The Cheat Sheet

Understand the difference in seconds.

The Verdict: You don’t have to choose one. The best portfolios often use Value for defense and Growth for offense.

How to Calculate “Intrinsic Value” (The Benjamin Graham Formula)

In his 1949 classic, Benjamin Graham proposed a simple heuristic to estimate value. While modern markets have become more complex, this formula illustrates how Graham prioritized earnings and growth over hype.

Don’t just guess. Use the math.

Benjamin Graham used a simple formula to estimate what a stock is truly worth. While modern analysts use complex DCF (Discounted Cash Flow) models, this is the classic “back of the napkin” math:

• V: Intrinsic Value (What you should pay)
• EPS: Earnings Per Share (Trailing 12 months)
• 8.5: The base P/E for a company with zero growth
• g: The expected growth rate for the next 7-10 years

  Note: This formula is from 1949 and is used here for educational illustration only. Modern valuation requires more complex modeling.