The capital asset pricing theory and its misconceptions

Resumo

The CAPM is the fundamental model for pricing financial securities. Nevertheless, the way it is proved in Finance textbooks can be fairly confusing, and more complicated than necessary; with an excessive use of figures at the expense of equations. In addition, depending on the Finance textbook, the set of assumptions that are supposedly needed to prove the CAPM may actually differ. This paper tries to provide an intuitive and straightforward proof of the CAPM and it also illustrates at which instances of the proof the traditional assumptions are actually needed. The main conclusion is that a much simpler version of the CAPM would possibly be as formidable and ingenious as the traditional one and yet, with a much more intuitive proof and fewer unrealistic assumptions.

Ficha do documento

Tipo

Estudo

Ano

2016

Instituição

Escola de Economia de São Paulo

Fonte

Repositório da FGV

Idioma

Inglês

Acesso

Acesso aberto

Identificador

oai:repositorio.fgv.br:10438/17660

Temas

Economia

Palavras-chave

Capital asset pricing modelMarket portfolioRisk free securityEconomiaRisco (Economia)Modelo de precificação de ativosInvestimentos - Administração