Plain-English definitions of key terms used in stock valuation and fundamental analysis.
Intrinsic value is the estimated true worth of an asset based on its fundamental economic characteristics, completely independent of its current market price or the mood of Mr. Market. The concept was formalized by Benjamin Graham and David Dodd in their landmark 1934 textbook Security Analysis, where they argued that every business has an underlying value determinable through rigorous fundamental analysis. In stock valuation, intrinsic value most precisely represents the present value of all cash the business will generate over its remaining life, discounted back at an appropriate risk-adjusted rate. Because this calculation requires forecasting an uncertain future, intrinsic value is best thought of as a range rather than a single precise number — a band within which the true value almost certainly lies.
Margin of safety is the percentage discount between a stock's estimated intrinsic value and its current market price, providing a cushion against errors in the stock valuation model, unforeseen adverse events, and the inherent uncertainty of forecasting future cash flows. The concept was introduced by Benjamin Graham in his 1934 treatise Security Analysis and later popularized for a general audience in The Intelligent Investor (1949), where Graham devoted an entire chapter to arguing that margin of safety is the central concept of sound investing. Just as a bridge engineer designs a structure rated to hold ten times the expected load — not merely the expected load — an investor demanding a margin of safety is building in protection against being precisely wrong while still being directionally right. The margin of safety is not a fixed number applicable to all situations: highly predictable, asset-heavy businesses (utilities, consumer staples) may warrant a 15–20% buffer, while speculative growth companies with uncertain cash flows may require 40–50% or more.
Discounted Cash Flow (DCF) is a fundamental stock valuation methodology that estimates the present value of a business or investment by projecting its expected future free cash flows and discounting each cash flow back to today's dollars using a risk-adjusted rate (typically the Weighted Average Cost of Capital). The mathematical foundations of DCF trace to Irving Fisher's 1930 work The Theory of Interest, and the method was adapted for equity analysis by John Burr Williams in The Theory of Investment Value (1938), who argued that a stock's worth is "the present value of all the dividends to be paid upon it." Modern DCF practice, as codified by practitioners like Aswath Damodaran in Damodaran on Valuation, extends Williams's framework to free cash flow to the firm, enabling stock valuation of businesses regardless of their dividend policy. DCF is considered an intrinsic stock valuation method because it derives value from a business's own economics — its growth rate, profitability, reinvestment needs, and risk — rather than by benchmarking against comparable companies whose stock valuations may themselves be mispriced.
Free Cash Flow (FCF) is the cash a company generates from its core business operations after funding the capital expenditures necessary to maintain and grow its asset base — representing the true economic earnings available to all capital providers before financing decisions. The concept was popularized for equity valuation by Warren Buffett's notion of "owner earnings," introduced in his 1986 Berkshire Hathaway annual letter, where he described the cash that could hypothetically be extracted from a business without impairing its competitive position. In formal finance, FCF is distinguished from net income because it excludes non-cash accounting items (depreciation, amortization) and includes the real cash cost of sustaining the business (capital expenditures), making it far more resistant to earnings management than GAAP net income. There are two common variants: Free Cash Flow to the Firm (FCFF), used in DCF analysis to value the entire enterprise before paying debt holders, and Free Cash Flow to Equity (FCFE), which deducts net debt payments and is used in equity-focused models; MiniValuator uses FCFF as its primary DCF input.
WACC is the blended rate of return that a company must earn on its invested capital to satisfy all of its capital providers — equity shareholders and debt holders alike — weighted by each source's proportional share of the total capital structure. The framework emerged from the foundational work of Franco Modigliani and Merton Miller in their 1958 and 1963 papers on capital structure, and was extended into practical stock valuation methodology by academics and practitioners through the 1970s and 1980s. The equity component of WACC is calculated using the Capital Asset Pricing Model (CAPM) — cost of equity = risk-free rate + beta × equity risk premium — while the debt component uses the company's pre-tax borrowing rate adjusted for the tax shield (since interest is deductible). The tax shield on debt is a key reason why companies with investment-grade debt tend to have lower WACCs than all-equity financed peers, though the benefit is limited by financial distress risk at high leverage ratios. WACC serves as the discount rate in DCF analysis, functioning as the hurdle rate against which projected cash flows are measured: a company whose return on invested capital exceeds its WACC is creating economic value; one whose ROIC falls below WACC is destroying it.
Terminal value represents the present value of all future cash flows beyond the explicit forecast period in a DCF model. It captures the ongoing value of a business assumed to continue operating indefinitely.
An exit multiple is a stock valuation ratio (such as EV/EBITDA or EV/FCF) applied to a financial metric in the final forecast year to estimate the terminal value in a DCF model.
The perpetuity growth rate (also called the terminal growth rate) is the constant rate at which a company's free cash flows are assumed to grow forever beyond the DCF forecast period in stock valuation.
Earnings Per Share (EPS) is a company's net income divided by its weighted average number of outstanding shares. It measures the profit allocated to each share of common stock and is a widely referenced figure in stock valuation.
The Price-to-Earnings (P/E) ratio is a relative valuation metric that compares a company's current share price to its earnings per share. It indicates how much investors are willing to pay per dollar of earnings.
Enterprise Value (EV) represents the total value of a company to all capital providers (equity holders + debt holders - cash) and is a foundational concept in stock valuation. It is a capital-structure-neutral measure of a company's worth.
Net Present Value (NPV) is the sum of all future cash flows discounted to their present value, minus the initial investment. A positive NPV indicates an investment is expected to create value — a core concept in stock valuation.
Beta measures the sensitivity of a stock's returns to movements in the overall market. A beta of 1.0 means the stock moves in line with the market; above 1.0 means greater volatility; below 1.0 means less. In stock valuation, beta is a core input for calculating the cost of equity via CAPM.
CAPM is a financial model that defines the relationship between systematic risk and expected return for an asset. In stock valuation, CAPM is used to calculate the cost of equity — the return required by equity investors given the stock's market risk (beta).
Cost of equity is the return that equity investors require to compensate them for the risk of investing in a company's stock. It is a key component of WACC and therefore directly affects the discount rate used in DCF stock valuation.
ROIC measures how efficiently a company generates profit from its total invested capital (equity + debt). It is one of the most important quality metrics in stock valuation because companies that consistently earn ROIC above their WACC create economic value.
Return on Equity (ROE) measures how much net profit a company generates per dollar of shareholders' equity. It reflects management's ability to generate returns for equity owners, making it a widely used quality metric in stock valuation.
Revenue growth rate is the percentage increase in a company's total revenue over a given period. In stock valuation, it is a primary driver of free cash flow projections and terminal value assumptions in DCF models.
The Price-to-Book (P/B) ratio compares a stock's market price to its book value per share (assets minus liabilities on the balance sheet). It is a relative stock valuation metric favored by Graham-style value investors.
EV/EBITDA is a stock valuation multiple that compares a company's Enterprise Value to its Earnings Before Interest, Taxes, Depreciation, and Amortization. It is widely used in relative stock valuation and as an exit multiple in DCF terminal value calculations.
Book value is the net asset value of a company as recorded on its balance sheet — total assets minus total liabilities. Per share book value is obtained by dividing by shares outstanding. It represents the accounting value of equity and is a reference point in stock valuation.
The Dividend Discount Model (DDM) is a stock valuation method that estimates intrinsic value as the present value of all future dividends. It is most appropriate for mature, dividend-paying companies with stable and predictable payout histories.
Sensitivity analysis in stock valuation tests how changes in key input assumptions affect the output (intrinsic value). A sensitivity heatmap typically varies the discount rate (WACC) and growth rate simultaneously, revealing the range of plausible intrinsic values.
A two-stage DCF model divides the forecast period into two phases: a high-growth stage (typically 5–10 years) with explicitly projected cash flows, followed by a stable-growth stage captured in the terminal value. It is the standard approach for stock valuation of growth companies.
Operating Cash Flow (OCF) is the cash generated by a company's core business operations, before capital expenditures. It is the starting point for calculating free cash flow and serves as a measure of a company's ability to self-fund growth — a critical input for DCF stock valuation.
Shares outstanding refers to the total number of shares of a company's stock that have been issued and are held by investors, including insiders and institutional holders. Diluted shares outstanding includes the effect of stock options, warrants, and convertible instruments — this is the correct figure to use in stock valuation.
Free Cash Flow Yield is the ratio of free cash flow per share to the stock price, expressed as a percentage. It is the inverse of the P/FCF multiple and provides a direct yield-based measure of stock valuation — analogous to a bond's current yield but based on cash generation rather than coupon payments.
Owner Earnings is a concept introduced by Warren Buffett in his 1986 Berkshire Hathaway letter as a more accurate measure of true economic earnings than reported net income. It adjusts net income for non-cash charges and maintenance capital expenditures to approximate the cash an owner could sustainably extract from the business — a preferred input for stock valuation.
Mastering stock valuation starts with understanding these core terms. From free cash flow to terminal value, each concept plays a critical role in estimating what a stock is truly worth. This glossary explains the most important stock valuation terms in plain English, with real examples and formulas where applicable.
Quick answers about DCF terms and stock valuation concepts.
