Question

                  a             b Expected return 0.1 0.08 SD 0.06 0.05 investment weight 0

                  a

            b

Expected return

0.1

0.08

SD

0.06

0.05

investment weight

0.3

0.7

covariance

0.0008

0.086

0.586436

0.765791094

=0.3*0.1+0.7*0.08 = 0.086

=(0.3^2)+(0.06^2)+(0.7^2)+(0.05^2)+2*0.3*0.7*0.0008= 0.5866436

=SQRT (0.5866436) = 0.76579109

************PLEASE CHECK MY WORK*******

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Answer #1

Expected return calculated is correct, but there is a small mistake in portfolio standard deviation

Standard deviation of a portfolio is

0,- /wo, + wžo į + 2w,w,Cov 1,2

using formula

Sqrt(0.3^2)*(0.06^2)+(0.7^2)*(0.05^2)+2*0.3*0.7*0.0008 = sqrt(0.001885) = 0.043417

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