What is value investing?

Price is what you pay. Value is what you get.

Value investing starts from a simple observation: the stock market quotes prices every second, but the underlying worth of a business changes slowly. A share of stock is a fractional ownership claim on a company’s future cash flows — not a ticker symbol that wiggles on a screen. When the quoted price falls meaningfully below a conservative estimate of that worth, a value investor has an opportunity. When price runs far above it, the same investor waits.

The approach was formalized by Benjamin Graham in the 1930s and refined by practitioners such as Warren Buffett, Charlie Munger, Seth Klarman, and Howard Marks. Their methods differ, but the foundation is shared: estimate intrinsic value independently, then let the gap between price and value drive the decision.

A business is worth the cash it can return to its owners, discounted to today.

Intrinsic value is most often estimated with a discounted cash flow (DCF) model: project the free cash flow a company can generate, discount it back at a required rate of return, and add a conservative terminal value. Because the future is uncertain, serious investors test multiple scenarios and prefer inputs they can defend. Tools like a DCF calculator, a reverse DCF, and a WACC estimator make those assumptions explicit instead of hiding them.

Buy at a discount large enough to survive your own mistakes.

No valuation is precise. The margin of safety — buying at, say, 30–50% below estimated intrinsic value — exists because your estimate will sometimes be wrong. The discount absorbs forecasting errors, bad luck, and changes in the business. It is the central risk-management idea of the entire discipline: protection comes from the price you pay, not from predictions.

Know what you understand — and stay inside it.

Buffett’s rule is that the size of your circle matters less than knowing its boundary. Value investors concentrate on businesses whose economics they can genuinely reason about, and pass on everything else. A written research record helps: when you log the thesis, the numbers, and your mood at the time of each decision, you learn where your judgment is reliable.

Valuefocus turns these principles into a daily research workflow.

Ask about a ticker and receive a structured report with valuation, risks, and counterpoints from master-investor lenses. Pressure-test the idea in Value Chat, check your margin of safety with the free calculators on this site, and keep a decision journal so the record — not the narrative — judges your process.