The main purpose of this paper is to analyse if the Capital Asset Pricing Model and a two-factor model (model extended with the size factor) can efficiently explain the variability of the returns on the Personal Pension Plans in Spain over 1995-2003. We analyse the sample of two ways: set of...

“Orthogonal portfolios” methodology applied by Roll (1980), in order to get an orthogonal zero-beta portafolio when we have a nonefficient market index in Mean-Variance approach, is used by MacKinley and Pastor (2000) to obtain a non observed risk factor that considers the information aj?0...

De acuerdo a la literatura el precio de un activo (financiero o real) experimenta una burbuja si su precio de mercado se encuentra desajustado de manera persistente en el tiempo con respecto a su valor intrínseco o fundamental. En un contexto de racionalidad y eficiencia es difícil aceptar la...