When Estimating the Cost of Capital (Part I of III) In this paper, published in three parts with NACVA’s QuickRead, Roger Grabowski reviews the size effect, potential reasons why one observes the size effect, and correct common misconceptions and address criticisms of the Size Premia (SP). Throughout this paper, the author shows that using a pure market factor as the sole risk factor in estimating the expected return provide an incomplete estimate. For the last four decades, research has shown that adjustments to the CAPM are required. Here, Roger Grabowski addresses some of the criticism to the theoretical basis of…
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Measuring the Relative Performance of Small Stock vs. Large Stock and the Cost of Equity Roger Ibbotson and James Harrington discuss two different ways of measuring the relative performance of small stocks versus large stocks in this article: (i) the “small stock premium” and (ii) the “beta-adjusted size premium”. Ibbotson and Harrington demonstrate why using a non-beta-adjusted size premium within the context of the capital asset pricing model (CAPM) to estimate cost of equity capital will likely “double count” beta risk, and therefore overstate risk and understate value. The authors also demonstrate that a non-beta-adjusted size premium used in conjunction…