What is stock valuation?
Stock valuation is the process of estimating what a share of a company is worth by comparing its market price with measures of its earnings, cash flows, assets, or growth prospects. The word "estimating" carries the weight: no method outputs a guaranteed correct price. Each method asks the question from a different angle, embeds different assumptions, and regularly disagrees with the others. The point of valuation is to make those assumptions visible so that a judgment about the business can consider all of them.
This lesson is informational only. It does not recommend buying, selling, or holding any security, and it does not present any valuation method as a path to profitable trades. A stock can screen inexpensive on every measure and still decline if the business deteriorates; a stock can screen expensive and still rise if growth exceeds what the methods assumed. The P/E lesson shows how one widely used multiple is actually read and verified.
Price multiples: shorthand comparisons against one number
Price multiples divide a market price by a single measure of value: earnings, sales, book value, or cash flow. They are the most quoted valuation numbers because they compress a comparison into one figure. They are also the most easily misread, because the comparison they encode depends entirely on the chosen measure and the comparison set.
Price divided by earnings per share. Asks what the market pays for one dollar of earnings. Useful when earnings are positive and stable; meaningless with negative earnings and fragile around one-time items. P/E glossary entry and the full P/E lesson cover its traps.
Price divided by revenue per share. Asks what the market pays for one dollar of revenue. Useful when earnings are negative or distorted, because revenue is harder to manipulate than profit. Blind to margins: a low P/S can describe a business that will never earn on those sales.
Price divided by book value per share. Asks what the market pays for one dollar of net assets. Useful for asset-heavy businesses like banks and insurers, where the balance sheet is the business. Weak for asset-light businesses whose value lives in brands, software, or relationships that book value never records.
Enterprise value divided by earnings before interest, taxes, depreciation, and amortization. Asks what the whole company (equity plus debt) is worth relative to operating earnings before financing and accounting choices. Compares companies with different debt levels more cleanly than P/E, but ignores capital spending that EBITDA excludes.
Every multiple embeds the same assumption: that the chosen measure is the right one for this business and this moment. A P/E on peak-cycle earnings, a P/S on revenue that converts at 2% margins, or a P/B on a balance sheet full of intangible assets can each produce a multiple that answers a question nobody should be asking. The P/E versus PEG lesson shows how one multiple tries to fold growth expectations into the shorthand, and where that folding breaks.
Comparable companies: borrowing the market's pricing from peers
Comparable-company analysis (often called "comps") applies the multiples of peer companies to the company being studied. If similar businesses trade at a certain multiple of earnings or sales, the argument goes, this business should trade near that multiple once adjusted for its differences. The method is relative in the purest sense: it asks whether the company is priced richly or cheaply compared with the group, not whether the group itself is priced correctly.
The peer set is the entire method
A comps analysis is only as good as the peers it selects. Good peers share the economics that drive the multiple: similar growth rates, margin structures, capital intensity, cyclicality, and risk. Choosing peers by sector label alone is not enough. Document why each peer belongs in the set and which differences you adjusted for; an undefended peer set is an undefended conclusion.
Comps measure the market's mood, not the truth
If the entire peer group is overpriced - in a sector-wide boom, for example - the median multiple is an overpriced benchmark, and looking cheap against it means little. Comps inherit the market's current pricing of every assumption built into peers. This is why relative valuation should sit alongside an intrinsic method rather than stand alone.
Compare against the company's own history too
A company's own historical multiple range, measured across different market and cycle conditions, is often more informative than peers. If the current multiple sits at the top of its own ten-year range, the question is whether the business or the environment justifies a level the market has rarely granted before. The fundamentals comparison lesson walks through building these peer and history comparisons from filings.
Discounted cash flow: the concept, without the spreadsheet worship
The discounted cash flow (DCF) concept starts from a simple idea: a business is worth the cash it will generate for its owners, discounted back to today because money received later is worth less than money received now. The analyst projects future cash flows over a number of years, discounts each year's flow at a rate reflecting risk and the time value of money, adds a terminal value for the years beyond the projection, and arrives at an estimated present value.
The cash-flow projections are where the real assumptions live: revenue growth, margins, reinvestment needs, and how long high growth persists. Small changes in the growth trajectory compound into large changes in estimated value. Read any DCF by reading its projection first and its answer second.
The rate used to discount future cash flows reflects the risk the analyst assigns to the projections and the return demanded for waiting. Higher risk or higher demanded return means a lower present value. Because the rate is chosen rather than observed, two analysts can value the same projected cash flows differently on this input alone.
The terminal value estimates everything beyond the explicit projection period, often under an assumption of modest perpetual growth. In many DCFs it accounts for the majority of the estimated value, which means the headline answer often rests on the assumption the analyst spent the least time defending. Always ask what share of the answer the terminal value supplies.
A DCF that produces a value to two decimal places has not thereby become accurate. The output's precision comes from arithmetic; its accuracy comes from the projections. Treat DCF output as a range under scenarios - pessimistic, base, optimistic - rather than a single number, and write down which scenario you actually believe and why.
Conceptually, the DCF is the cleanest valuation idea in finance: value the cash, not the story. Practically, its sensitivity to inputs is exactly why this lesson frames valuation as assumption management. The method forces you to state what you believe about growth, margins, risk, and longevity; the discipline is in defending those beliefs with evidence from the 10-K and the business, not in the spreadsheet mechanics.
Why different methods disagree - and what the disagreement tells you
Disagreement between valuation methods is normal and useful. Each method answers a different question with different inputs, so their divergence maps the shape of your uncertainty rather than indicating that one method is broken. The productive response is not to average them into a fake consensus but to ask what each answer would require to be true.
Multiples say cheap, DCF says expensive
This pattern often means the market's current pricing of peers (or the company's history) is generous relative to the business's own projected cash flows. The question to investigate: is the peer set genuinely comparable, or is the whole group priced for a growth outlook that this company's cash-flow evidence does not support?
DCF says cheap, multiples say expensive
This pattern often means the market doubts the growth story that the DCF's projections assume. The question to investigate: what evidence supports the projection - segment growth, margin expansion, reinvestment returns - and what is the market pricing that the projection ignores, such as balance-sheet risk or management credibility?
Every method says the same thing
Agreement across methods with genuinely different assumptions is the strongest signal valuation can give - and it is rare. Before trusting it, check that the methods are actually independent: a DCF whose terminal value was calibrated to peer multiples and a comps analysis using the same peers are not two votes; they are one vote counted twice.
Record each method's answer, its key inputs, and the assumption that would have to break for the answer to change. That record is the deliverable of a valuation exercise: not a price target, but an explicit map of what you believe and what would prove you wrong.
The valuation assumption worksheet
Run each valuation lens through this table before treating any answer as meaningful. A completed worksheet does not say the stock is attractive; it says which assumptions each answer depends on, and which of those assumptions the evidence actually supports.
| Method | Question it answers | Key assumption recorded | Evidence that supports it | What breaks the answer |
|---|---|---|---|---|
| P/E multiple | What the market pays for $1 of earnings | Earnings measure, period, GAAP or adjusted | Filing-sourced EPS, matching periods | One-time items, cycle peak, negative earnings |
| P/S multiple | What the market pays for $1 of revenue | Revenue quality and margin outlook | Segment margins, revenue recognition note | Revenue that never converts to profit |
| P/B multiple | What the market pays for $1 of net assets | Book value reflects economic assets | Balance sheet composition, intangibles | Asset-light business, impaired assets |
| EV/EBITDA | Company value vs operating earnings | EBITDA approximates operating cash power | Cash conversion, capex levels | Heavy capex, working-capital distortion |
| Comps | Rich or cheap vs the peer set | Peers share the relevant economics | Peer selection documented, adjustments shown | Mispriced sector, mismatched peers |
| DCF | Present value of future cash flows | Projections, discount rate, terminal value | Segment trends, margins, reinvestment returns | Over-optimistic growth, understated risk |
Completion rule: every method you cite gets a filled row: the assumption written in plain words, the evidence it rests on, and the specific development that would invalidate it. A valuation without a written assumption record is an opinion looking for numbers.
Questions about stock valuation
What is stock valuation?
Stock valuation is the process of estimating what a share of a company is worth, usually by comparing its market price with measures of its earnings, cash flows, assets, or growth prospects. It is a framework for organizing evidence and assumptions, not a procedure that outputs a guaranteed correct price. Different methods answer the same question from different angles and regularly disagree.
What are the main stock valuation methods?
The main families are price multiples (ratios like price-to-earnings or enterprise value to EBITDA that compare market price with a per-share or company-wide measure), comparable-company analysis (applying peer multiples to the subject company), and discounted cash flow analysis (estimating the present value of future cash flows). Asset-based approaches and dividend models are used in specific situations, such as asset-heavy businesses or steady dividend payers.
What is a discounted cash flow (DCF) analysis?
A discounted cash flow analysis estimates a company's value by projecting its future cash flows over a period of years and then discounting them back to the present at a rate reflecting risk and the time value of money. Its output is only as good as its inputs: the cash-flow projections, the discount rate, and the terminal value assumption usually dominate the result, so the same company can produce very different values from slightly different assumptions.
Why do different valuation methods give different answers?
Each method embeds different assumptions and answers a different question. Multiples ask what the market pays for comparable earnings today; DCF asks what future cash flows are worth under specific projections and a chosen discount rate; asset-based methods ask what the balance sheet holds. They disagree because they measure different things with different inputs, and disagreement between methods is itself information about where the uncertainty lies.
What is the difference between relative and intrinsic valuation?
Relative valuation compares a company with peers or its own history using multiples, asking whether it is priced richly or cheaply versus the comparison set. Intrinsic valuation estimates what the company is worth on its own terms, usually through a discounted cash flow, asking what the business's future cash generation is worth today. Relative methods can be systematically wrong if the whole comparison set is mispriced; intrinsic methods can be precisely wrong if the projections are off.
Can valuation tell me whether to buy a stock?
No. Valuation methods organize evidence and make assumptions explicit, but they do not produce buy or sell instructions. A stock can look inexpensive on every multiple and still decline if the business deteriorates, and a stock can look expensive on every measure and still rise if growth exceeds expectations. Valuation is an input to a broader judgment that includes business quality, risk, diversification, and personal circumstances.
StockEyes provides informational research organization and transparent calculations, not personalized investment advice, valuation conclusions, trade instructions, or predictions. Nothing in this lesson is a recommendation to buy, sell, or hold any security. Always review the original filings before relying on a number, and consult a qualified professional for advice about your own situation.