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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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    References listed on IDEAS

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    More about this item

    Keywords

    Capital budgeting; CAPM; investment decisions; nonadditivity; framing effects;
    All these keywords.

    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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