Portfolio Pricing Methods
Portfolio Pricing Methods
The idea of business investments assembled as part of an investment portfolio is a powerful one with ramifications that extend to the pricing of individual investments. The author describes the mean-variance framework, as outlined by Harvey Markowitz in the 1950s, as establishing the basis for an entire class of Modern Portfolio Theory models. The author then outlines the relationship between portfolio models and the Basic Pricing Equation, the most familiar of the portfolio models, the Capital Asset Pricing Model, including a recursive derivation of the CAPM that is somewhat closer to actual household behavior than the typical presentation, and the Roll critique of CAPM and similar models, and extends that critique noting that equity in 99% of firms do not fit into portfolio models. Portfolio models are then tested to see if they provide a practical basis for valuing three actual firms.
Keywords: portfolio models, CAPM, Markowitz, empirical CAPM, recursive models, quadratic CAPM, factor models, Roll critique, Modern Portfolio Theory, MPT
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