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calculare the standard deviation of a portfolio that contains 40% of one stock with a standard...

calculare the standard deviation of a portfolio that contains 40% of one stock with a standard deviation of 23% and 60% of another stock with a standard deviatiom of 26% and the correlation of their stock returns is 0.2
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Standard Deviation of portfolio = [(standard Deviation A)2)(Weight A)2 + (Standard Deviation B)2(Weight B)2 + 2(Standard Deviation A)(Standard Deviation B)(Weight A)(Weight B)(correlation coefficient)]1/2

= [(23)2(0.4)2 + (26)2(0.6)2 + 2(23)(26)(0.4)(0.6)(0.2)]1/2

= 19.63%

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