Discounted Cash Flow
Updated 2026-08-11
INTRODUCTION
English translation pending.
CORE DEFINITION
Discounted cash flow estimates value by projecting the cash a business will generate and reducing each period to its present value using a discount rate that prices time and risk. The idea traces to John Burr Williams, whose 1938 book The Theory of Investment Value argued that a stock is worth the present value of its future dividends. Munger treated the method as a way of thinking rather than a calculator: the output is only as good as the assumptions, so the discipline lies in testing how sensitive the answer is.
SCAFFOLDING EFFECT
Reduce cognitive load
- Assumption exposure: state the growth and margin figures your value depends on - Sensitivity sweep: vary the discount rate and terminal growth to see the plausible range - Sanity gate: treat a value that flips on small tweaks as evidence you do not understand the business
Anchor fast decisions
Money available today can be invested immediately and is not exposed to future uncertainty or inflation, so a dollar received later is worth less than a dollar now. Discounting each future cash flow puts amounts from different dates on a single comparable scale, with the discount rate carrying both the time value of money and the risk attached to the forecast. This is also why the result is so sensitive to the discount rate and to growth far in the future.
MINIMUM ACTION
In progress 0/1Practice this model in one real situation:
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Source support: Explicit
- mungermodels.comhttps://mungermodels.com/models/discounted-cash-flowverified
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