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A general formula for the WACC: A correction

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  • Fernandez, Pablo

    ()
    (IESE Business School)

Abstract

This paper corrects some of the equations of Farber, Gillet and Szafarz (2006). The WACC is a discount rate widely used in corporate finance. However, correctly calculating the WACC involves properly calculating the value of tax shields, and the value of tax shields depends on the company's debt policy. Many authors [e.g. Inselbag and Kaufold (1997), Booth (2002), Cooper and Nyborg (2006), Farber, Gillet and Szafarz (2006)] have stated that debt policy can only be implemented by maintaining a fixed market-value debt ratio (Miles-Ezzell's assumption) or a fixed dollar amount of debt (Modigliani-Miller's assumption).

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Bibliographic Info

Paper provided by IESE Business School in its series IESE Research Papers with number D/663.

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Length: 7 pages
Date of creation: 16 Dec 2006
Date of revision:
Handle: RePEc:ebg:iesewp:d-0663

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Postal: IESE Business School, Av Pearson 21, 08034 Barcelona, SPAIN
Web page: http://www.iese.edu/
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Related research

Keywords: required return to equity; value of tax shields; company valuation; cost of equity;

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References

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  1. André Farber & Roland Gillet & Ariane Szafarz, 2005. "A general formula for the WACC," Working Papers CEB 05-012.RS, ULB -- Universite Libre de Bruxelles.
  2. Miles, James A & Ezzell, John R, 1985. " Reformulating Tax Shield Valuation: A Note," Journal of Finance, American Finance Association, vol. 40(5), pages 1485-92, December.
  3. Cooper, Ian A. & Nyborg, Kjell G., 2005. "The value of tax shields IS equal to the present value of tax shields," Discussion Papers 2005/14, Department of Business and Management Science, Norwegian School of Economics.
  4. Laurence Booth, 2002. "Finding Value Where None Exists: Pitfalls In Using Adjusted Present Value," Journal of Applied Corporate Finance, Morgan Stanley, vol. 15(1), pages 95-104.
  5. Isik Inselbag & Howard Kaufold, 1997. "Two Dcf Approaches For Valuing Companies Under Alternative Financing Strategies (And How To Choose Between Them)," Journal of Applied Corporate Finance, Morgan Stanley, vol. 10(1), pages 114-122.
  6. Richard S Ruback, 2002. "Capital Cash Flows: A Simple Approach to Valuing Risky Cash Flows," Financial Management, Financial Management Association, vol. 31(2), Summer.
  7. Lewellen, Wilbur G. & Emery, Douglas R., 1986. "Corporate Debt Management and the Value of the Firm," Journal of Financial and Quantitative Analysis, Cambridge University Press, vol. 21(04), pages 415-426, December.
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Cited by:
  1. André Farber & Roland Gillet & Ariane Szafarz, 2007. "A general formula for the WACC: a reply," Working Papers CEB 07-004.RS, ULB -- Universite Libre de Bruxelles.

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