Mean returns for portfolios are calculated by taking the weighted average of the mean returns for each

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Mean returns for portfolios are calculated by taking the weighted average of the mean returns for each investment in the portfolio. Why won’t this approach work to calculate the standard deviation of portfolio returns?

Portfolio
A portfolio is a grouping of financial assets such as stocks, bonds, commodities, currencies and cash equivalents, as well as their fund counterparts, including mutual, exchange-traded and closed funds. A portfolio can also consist of non-publicly...
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Real Estate Finance and Investments

ISBN: 978-0073377339

14th edition

Authors: William Brueggeman, Jeffrey Fisher

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