What Is Intrinsic Value? How to Estimate What a Stock Is Really Worth

Written by Jim Norris · NorrisAI AlphaLens · Updated August 2026

Quick answer: Intrinsic value is what a business is genuinely worth — based on the cash it will generate over its lifetime, discounted back to today — independent of what the market currently prices it at. It's the foundation of value investing: buy when the market price is meaningfully below intrinsic value (providing a margin of safety), and sell or hold when the price approaches or exceeds it. Intrinsic value is a range, not a precise number, because it's built on assumptions about an uncertain future.

Where the concept comes from

Benjamin Graham — Warren Buffett's mentor and the father of value investing — introduced intrinsic value as the cornerstone of rational investment analysis. His argument: the stock market in the short run is driven by sentiment, mood, and momentum — none of which have anything to do with what a business is actually worth. In the long run, price converges to value. The investor's job is to estimate value accurately enough to identify when price and value have meaningfully diverged.

How intrinsic value is estimated

The most rigorous approach is the Discounted Cash Flow (DCF) model — projecting the free cash flows a business will generate over time and discounting them back to present value using a rate that reflects the investment's risk.

Simplified: Intrinsic Value = Sum of all future cash flows, discounted to present value

In practice, this requires estimates of: revenue growth rate, operating margin trajectory, capital requirements, terminal growth rate, and discount rate. Each estimate carries uncertainty — which is why intrinsic value is always a range rather than a precise figure.

Why intrinsic value is a range, not a number

A DCF model that spits out "$147.83 per share" is projecting false precision. Small changes in assumptions produce large changes in output. A business growing at 15% with a 25% terminal margin is worth dramatically more than the same business growing at 12% with a 20% terminal margin — yet both seem like reasonable estimates.

The right approach: build three scenarios (optimistic, base, pessimistic) and express intrinsic value as a range. If the current stock price sits comfortably below the pessimistic case, the margin of safety is substantial. If it only makes sense under the optimistic case, there's essentially no cushion.

Professor Aswath Damodaran of NYU Stern Business School — widely regarded as the world's foremost authority on valuation — teaches that intrinsic value is an estimate built on uncertain inputs, and that the goal is to be approximately right rather than precisely wrong. A range of $120–$160 built on honest assumptions is more useful than a single number of $147.83 built on wishful thinking. — The Little Book of Valuation, Wiley

Intrinsic value vs market price — the investor's opportunity

The market price and intrinsic value diverge constantly and sometimes dramatically. Causes of underpricing: market overreaction to bad news, sector-wide selloffs that punish good companies alongside bad ones, small-cap neglect, complex business models that analysts misunderstand, or temporary earnings headwinds that obscure sustainable earnings power.

Causes of overpricing: excessive enthusiasm for a sector or theme, extrapolation of cyclically elevated margins, narrative-driven speculation disconnected from business fundamentals.

The investor's job is to estimate intrinsic value independently of price — and act when the gap is wide enough to provide an adequate margin of safety.

The margin of safety connection

Intrinsic value estimates are always uncertain. The margin of safety — buying at a meaningful discount to estimated intrinsic value — provides protection against errors in your assumptions. If you estimate intrinsic value at $100 and buy at $70, you have a 30% margin of safety. Even if you're somewhat wrong about the business's prospects, you may still earn an acceptable return.

The required margin of safety should be larger for: more uncertain businesses, earlier-stage companies with less financial history, more cyclical businesses whose earnings are harder to normalize, and businesses in rapidly changing industries.

Warren Buffett has said that intrinsic value is the only logical way to evaluate an investment — it's not a company's current earnings, not its book value, not its market cap, but the present value of the cash that can be taken out of the business over its remaining life. Everything else in valuation is a shortcut to approximating this number.

A concrete way to hold all of this together: say a company's estimated intrinsic value comes out to a range of $90–$110 per share, and the stock trades at $75. The margin of safety is the gap between your price and the conservative end of that range — roughly 17% here, using $90 as the anchor. That gap is your cushion if the estimate turns out too optimistic. The free Margin of Safety Calculator runs that exact math for any two numbers you enter. The harder problem — actually arriving at a $90–$110 range in the first place, instead of guessing — is what the Fair Value Stress Test framework does: it builds bull, base, and bear DCF scenarios and stress-tests the assumptions behind each one, rather than asking you to trust a single point estimate.

How AlphaLens estimates intrinsic value

The Fair Value Stress Test — framework #3 — is AlphaLens's dedicated intrinsic value framework. It builds the three-scenario DCF approach, shows the range of values under different assumptions, identifies which variables the valuation is most sensitive to, and compares the result to current market price. It answers: at today's price, what does the market need to believe about this business — and is that belief realistic?

Where to go deeper

For a detailed walkthrough of each research framework, see the complete guide to all 15 AlphaLens frameworks.

For definitions of investing terms, see the AlphaLens investing glossary.