Definition
Intrinsic value is an estimate of what a stock is actually worth, based on the cash it's expected to generate in the future — as distinct from its current market price. The gap between intrinsic value and market price is what value investors call the margin of safety.
Three ways to estimate intrinsic value
There is no single "correct" intrinsic value — different models give different estimates depending on their assumptions. The three most common approaches:
Discounted Cash Flow (DCF)
Projects future free cash flows, discounts them to present value using WACC, adds a terminal value. Most versatile — works for any cash-generating business.
Dividend Discount Model (DDM)
Values a stock from its expected future dividends. Uses cost of equity as the discount rate (not WACC, since dividends flow to equity holders only).
Graham Number
A conservative heuristic combining earnings and book value. Not a present-value model — it's a screen, not a valuation.