| Which of the following is NOT a desirable characteristic of an asset class used for describing the returns on a portfolio?  | | A) | The asset classes used should explain a large part of the variability of portfolio returns. | 
 |  | | B) | The residual from the regression model of returns should be heteroskedastic. | 
 |  | | C) | Asset mix proportions should be easily measured. | 
 |  | | D) | It should be easy to construct a bogey portfolio for each class. | 
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 Answer and Explanation
 
 The asset classes used should explain a large part of portfolio return variability, the asset mix proportions should be easily measured, and it should be easy to construct a bogey portfolio for each class. Heteroskedasticity refers to a non-constant variance of the error terms in a regression, which makes the regression model unreliable.  |