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Theoretical Flaws In The Use Of The Capm For Investment Decisions

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  • Magni, Carlo Alberto

Abstract

This paper uses counterexamples and simple formalization to show that the standard CAPM-based Net Present Value may not be used for investment valuations. The reason is that the standard CAPM-based capital budgeting criterion implies a notion of value which does not comply with the principle of additivity. Framing effects arise in decisions so that different descriptions of the same problem lead to different choices. As a result, the CAPM-based NPV as a tool for valuing projects and making investment decisions is theoretically unsound, even if the CAPM assumptions are met.

Suggested Citation

  • Magni, Carlo Alberto, 2005. "Theoretical Flaws In The Use Of The Capm For Investment Decisions," MPRA Paper 6330, University Library of Munich, Germany, revised Nov 2007.
  • Handle: RePEc:pra:mprapa:6330
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    File URL: https://mpra.ub.uni-muenchen.de/6330/1/MPRA_paper_6330.pdf
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    References listed on IDEAS

    as
    1. Ravi Jagannathan & Iwan Meier, 2002. "Do We Need CAPM for Capital Budgeting?," Financial Management, Financial Management Association, vol. 31(4), Winter.
    2. Carlo Alberto Magni, 2007. "Project valuation and investment decisions: CAPM versus arbitrage," Applied Financial Economics Letters, Taylor and Francis Journals, vol. 3(2), pages 137-140.
    3. Magni, Carlo Alberto, 2002. "Investment decisions in the theory of finance: Some antinomies and inconsistencies," European Journal of Operational Research, Elsevier, vol. 137(1), pages 206-217, February.
    4. Bierman, Harold, Jr & Hass, Jerome E, 1973. "Capital Budgeting Under Uncertainty: A Reformulation," Journal of Finance, American Finance Association, vol. 28(1), pages 119-129, March.
    5. Graham, John R. & Harvey, Campbell R., 2001. "The theory and practice of corporate finance: evidence from the field," Journal of Financial Economics, Elsevier, vol. 60(2-3), pages 187-243, May.
    6. Bogue, Marcus C & Roll, Richard, 1974. "Capital Budgeting of Risky Projects with "Imperfect" Markets for Physical Capital," Journal of Finance, American Finance Association, vol. 29(2), pages 601-613, May.
    7. Dybvig, Philip H & Ingersoll, Jonathan E, Jr, 1982. "Mean-Variance Theory in Complete Markets," The Journal of Business, University of Chicago Press, vol. 55(2), pages 233-251, April.
    8. John Graham & Campbell Harvey, 2002. "HOW DO CFOs MAKE CAPITAL BUDGETING AND CAPITAL STRUCTURE DECISIONS?," Journal of Applied Corporate Finance, Morgan Stanley, vol. 15(1), pages 8-23.
    9. Magni, Carlo Alberto, 2009. "Correct or incorrect application of CAPM? Correct or incorrect decisions with CAPM?," European Journal of Operational Research, Elsevier, vol. 192(2), pages 549-560, January.
    10. Fama, Eugene F., 1977. "Risk-adjusted discount rates and capital budgeting under uncertainty," Journal of Financial Economics, Elsevier, vol. 5(1), pages 3-24, August.
    11. Ekern, Steinar, 2006. "A Dozen Consistent CAPM-Related Valuation Models - So Why Use the Incorrect One?," Discussion Papers 2006/6, Norwegian School of Economics, Department of Business and Management Science, revised 25 Apr 2007.
    12. Mossin, Jan, 1969. "Security Pricing and Investment Criteria in Competitive Markets," American Economic Review, American Economic Association, vol. 59(5), pages 749-756, December.
    13. Magni, Carlo Alberto, 2007. "CAPM and capital budgeting: present versus future, equilibrium versus disequilibrium, decision versus valuation," MPRA Paper 5468, University Library of Munich, Germany.
    14. Stapleton, Richard C, 1974. "Capital Budgeting under Uncertainty: A Reformation: Comment," Journal of Finance, American Finance Association, vol. 29(5), pages 1583-1584, December.
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    More about this item

    Keywords

    Capital budgeting; CAPM; investment decisions; nonadditivity; framing effects;

    JEL classification:

    • G12 - Financial Economics - - General Financial Markets - - - Asset Pricing; Trading Volume; Bond Interest Rates
    • G11 - Financial Economics - - General Financial Markets - - - Portfolio Choice; Investment Decisions
    • G31 - Financial Economics - - Corporate Finance and Governance - - - Capital Budgeting; Fixed Investment and Inventory Studies
    • G30 - Financial Economics - - Corporate Finance and Governance - - - General

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