Valuation is the process of estimating what a business is worth and comparing that estimate with the price the market is asking. It is part arithmetic and part judgment. The arithmetic is covered by a handful of well-known tools: multiples such as price to earnings, price to book and enterprise value to EBITDA; and discounted cash flow models that project future cash and convert it to a value today. The judgment lies in the inputs, such as growth, margins, risk and the discount rate, and small changes there can move the answer a lot.
Multiples are the quickest way to compare companies, but each carries blind spots. A P/E ratio depends on how earnings are measured, whether trailing or forward, and whether one-time items are included. Enterprise value looks at the whole business including debt, which makes it better for comparing companies with different capital structures. Book value matters more for banks and asset-heavy businesses than for software companies. Knowing which multiple fits which industry is half the skill.
A discounted cash flow model forces you to state your assumptions explicitly. It starts from free cash flow, projects it forward, and discounts it at a rate that reflects risk, often built from a weighted average cost of capital. Its strength is also its weakness: the terminal value usually accounts for a large share of the result, so the model is best used to test what a price implies rather than to produce a single precise number.
Good valuation begins with good inputs, and the best inputs come from primary sources. Annual reports on Form 10-K, quarterly reports on Form 10-Q and current reports on Form 8-K are filed with the SEC and are free to read on EDGAR. Learning to separate GAAP from adjusted figures, to read the cash flow statement alongside the income statement, and to notice items like stock-based compensation helps you see how much of reported profit turns into cash.
The guides below move from reading company filings, through the main valuation tools, to profitability and capital-return measures. They are educational and are not recommendations to buy or sell any security.
ECMSource publishes education and research, not personalised investment advice. See the financial information disclaimer.
Start here
Reading primary sources and the two most-used valuation ratios.
- SEC Filings Explained: 10-K, 10-Q, and 8-K — what each filing contains and where to look first
- How to Read an Earnings Report: Revenue, EPS, and Guidance — revenue, EPS and guidance, and how to read them together
- What Is the P/E Ratio and When Does It Mislead You? — trailing versus forward earnings, and when the ratio misleads
Reading financial statements
Understanding what the reported numbers do and do not say.
- GAAP vs. Non-GAAP Earnings: What Adjusted EPS Really Means — what adjusted figures leave out
- Stock-Based Compensation Explained: GAAP vs Non-GAAP — how equity pay shows up in reported results
- The Cash Flow Statement Explained: CFO, CFI, and CFF — operating, investing and financing cash flows
- What Is Free Cash Flow — and Why Investors Trust It — the formula and why investors lean on it
- Cash Conversion Cycle Explained: DSO, DIO, DPO — days sales, inventory and payables outstanding
- CapEx vs. OpEx: Accounting Rules, Tax Impact, and Cash Flow — how the classification changes reported results and cash
- Debt Service Coverage Ratio: Formula, Meaning, and Covenants — how lenders and covenants measure repayment capacity
Valuation multiples
Common ratios and when each one fits.
- Enterprise Value Explained: When EV/EBITDA Beats P/E — valuing the whole business including debt
- What Is EBITDA — And What It Doesn’t Tell You — the formula and its limitations
- PEG Ratio Explained: When Growth Justifies a High P/E — adjusting the P/E for expected growth
- Price-to-Book Ratio Explained: When Book Value Matters — when book value matters
- CAPE Ratio Explained: When Stocks Are Truly Expensive — a cyclically adjusted view of market valuation
- The Rule of 40 Explained: How SaaS Stocks Are Valued — a growth-plus-margin yardstick for software companies
Intrinsic value and cost of capital
Discounting future cash flows and choosing the rate.
- DCF Valuation Explained: Inputs, Math, and Pitfalls — inputs, math and common pitfalls
- WACC Explained: How Companies Calculate Their Cost of Capital — how companies calculate their cost of capital
- NPV vs IRR Explained: When They Disagree and Why — when the two project-ranking measures disagree and why
Returns, profitability and capital allocation
How well a business turns capital into profit, and what it does with the cash.
- DuPont Analysis Explained: 3-Step and 5-Step ROE — splitting return on equity into its drivers
- Return on Invested Capital (ROIC) Explained — measuring returns on all invested capital
- Stock Buybacks vs. Dividends: How Companies Pay You Back — two ways companies return cash to owners
- Dividend Payout Ratio: Formula, FCF Coverage, and Traps — formula, cash-flow coverage and traps
- Ex-Dividend Date Explained: Timeline, T+1 Rules, and Price Drops — the timeline and what happens to the price
- Stock Splits Explained: Forward, Reverse, and What They Do — what splits change and what they do not
- Stock Split Accounting: Par Value & Balance Sheet Effects — par value and balance sheet effects
Valuing banks
Banks are read through different measures from industrial companies.
- Bank Capital Ratios Explained: CET1, Tier 1, Tier 2 — CET1, Tier 1 and Tier 2 in plain terms
- Net Interest Margin Explained: How Banks Make Money — how banks earn from the gap between lending and funding
- Provision for Credit Losses: How Banks Calculate ACL and CECL — how expected credit losses are estimated
Related tools
- DCF Scenario Lab — test how growth and discount-rate assumptions change a DCF
- Reverse Valuation Calculator — work backwards from a price to the growth it implies