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Portfolio beta is a linear combination of each asset's beta times the weight of the asset in the portfolio. Thus in general we have $$ \beta = \sum_{i=1}^N w_i \beta_i $$ where $w_i$ is the weight of asset $i$ and $\beta_i$ its beta. If we assume that for stocks the betas are positive then $\beta$ above is positive for positive weights. If you have positive ...


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Some use the acronym SAMURAI: a benchmark should be S - Specified in Advance A - Appropriate M - Measurable U - Unambiguous R - Reflective of Current Investment Thinking A - Accountable I - Investable In principle it is the responsibility of the decision maker (the board of the pension fund) to set the benchmark, otherwise if the choice is left to ...



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