A portfolio is comprised of the following stocks. What is the portfolio beta? Stock Market Value of Shares Beta
A $ 14,000 1.79 B $ 17,500 .98 C $ 8,600 1.16 1.18 1.45 1.30 1.37
You own a $25,000 portfolio that is invested in a risk-free security and Stock A. The beta of Stock A is 1.70 and the portfolio beta is .95. What is the amount of the investment in Stock A? |
$14,791
$11,331
$13,971
$16,531
Solution: | ||||
1. | Answer is 3rd option 1.30 | |||
Working Notes: | ||||
Beta of a Portfolio = Weighted average beta of individual assets. | ||||
Stock A with a beta BA= 1.79 | ||||
WA = investment A/ total investment | ||||
= $14,000/($14,000 + $17,500 + $8,600) | ||||
= 0.349127 | ||||
Stock B with a beta BB= 0.98 | ||||
WB = investment in B/ total investment | ||||
= 17,500/($14,000 + $17,500 + $8,600) | ||||
= 0.43640897755 | ||||
Stock C with a beta BC= 1.16 | ||||
WC = investment in B/ total investment | ||||
= 8,600/($14,000 + $17,500 + $8,600) | ||||
= 0.21446384 | ||||
Beta of a Portfolio = Weighted average beta of individual assets. | ||||
= BA x WA + BB x WB + BC x WC | ||||
=1.79 x 0.349127 + 0.98 x 0.43640897755 + 1.16 x 0.21446384 | ||||
= 1.301396182 | ||||
=1.30 | ||||
2. | Answer is 3rd option $13,971 | |||
Working Notes: | ||||
Beta of a Portfolio = Weighted average beta of individual assets. | ||||
Beta of a Portfolio = 0.95 | ||||
Stock A with a beta BA= 1.70 | ||||
WA = investment A/ total investment | ||||
= Investment in A / $25,000 | ||||
Risk free security with a beta Brf= 0 | [Risk free security have beta Zero ] | |||
W Risk free = investment in Risk free security/ total investment | ||||
= investment in Risk free security/$25,000 | ||||
Beta of a Portfolio = Weighted average beta of individual assets. | ||||
0.95= BA x WA + Brf x Wrf | ||||
0.95= 1.70 x (investment in A/$25,000) + 0 x (investment in rf /$25,000) | ||||
0.95= 1.70 x (investment in A/$25,000) + 0 | ||||
0.95= 1.70 x (investment in A/$25,000) | ||||
Investment in A = 0.95 x 25,000 /1.70 | ||||
Investment in A = $13,970.58824 | ||||
Investment in A = $13,971 | ||||
Please feel free to ask if anything about above solution in comment section of the question. |
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