Fisher separation theorem
E196121
The Fisher separation theorem is a foundational result in financial economics stating that a firm's investment decision can be made independently of its owners' consumption preferences, focusing solely on maximizing the present value of the firm.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Fisher separation theorem canonical | 1 |
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
microeconomic theorem
ⓘ
theorem in financial economics ⓘ |
| appliesTo | competitive capital markets ⓘ |
| assumes |
complete and perfect information
ⓘ
investors are rational and maximize expected utility ⓘ investors can borrow and lend at the same risk‑free rate as firms ⓘ no taxes ⓘ no transaction costs ⓘ perfect capital markets ⓘ |
| assumptionType | normative and simplifying assumptions about markets and behavior ⓘ |
| category |
economic theorems
ⓘ
theorems in finance ⓘ |
| clarifies | distinction between production opportunities of the firm and preferences of investors ⓘ |
| consequence |
consumption choices can be made after investment decisions via trading in financial markets
ⓘ
firm’s objective function can be specified without reference to individual utility functions ⓘ |
| contrastsWith | models where managers maximize their own utility instead of firm value ⓘ |
| coreIdea |
firms should choose investment projects that maximize the present value of the firm
ⓘ
investment decisions can be separated from consumption preferences of owners ⓘ optimal investment rule is independent of individual shareholders’ risk preferences under certain conditions ⓘ |
| field |
corporate finance
ⓘ
financial economics ⓘ microeconomics ⓘ |
| formalizedIn | intertemporal choice models ⓘ |
| historicalContext | developed in early 20th‑century work of Irving Fisher ⓘ |
| implies |
all shareholders agree on the same investment rule under its assumptions
ⓘ
firm’s investment decision is to maximize net present value of projects ⓘ production decision of the firm is separate from owners’ consumption decisions ⓘ shareholders can adjust their personal consumption and risk through capital markets ⓘ |
| influenced |
development of normative corporate finance principles
ⓘ
modern theory of the firm in finance ⓘ |
| namedAfter | Irving Fisher ⓘ |
| relatedTo |
Modigliani–Miller theorem
ⓘ
consumption–investment separation ⓘ expected utility theory (with John von Neumann) ⓘ
surface form:
expected utility theory
net present value rule ⓘ |
| reliesOn |
competitive equilibrium in capital markets
ⓘ
present value calculation of cash flows ⓘ |
| requires | existence of well‑functioning financial markets for shareholders ⓘ |
| status | foundational result in financial economics ⓘ |
| supports |
separation of ownership and control in corporations
ⓘ
value maximization objective of the firm ⓘ |
| taughtIn |
MBA corporate finance courses
ⓘ
financial economics curricula ⓘ graduate microeconomics courses ⓘ |
| teaches | under ideal conditions, investment and financing decisions can be separated from consumption decisions ⓘ |
| usedIn |
analysis of shareholder unanimity on investment decisions
ⓘ
corporate investment decision‑making theory ⓘ derivation of firm value maximization as a normative rule ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.