Your portfolio is worth $100,000 and has a beta of 1.2. You have $40,000 of stock A which has a beta of 1.6. The rest of your portfolio is composed of stock B with a beta of 0.7 and stock C with a beta of 1.2. What is the value of stock C in your portfolio?
We know that the Beta of a portfolio is the weighted average of the Indidual stocks in the Portfolio.
Let the Value of the Stock B be X in the Portfolio. Then value of stock C shall be $100000 - 40000 -x or $60000 - X. Then the process to calculate the Beta of the portfolio shall be :
Stock | Value of the Stock | Beta | Value * Beta |
Stock A | 40000 | 1.6 | 64000 |
Stock B | x | 0.7 | 0.7x |
Stock C | 60000-x | 1.2 | 72000-1.2x |
Total | 100000 | 136000 - 0.5x |
Now as we know Beta is weighted Average. Thus Beta is :
(136000 - 0.5x)/ 100000.
As it is given in question that the beta of the portfolio is 1.2,
we can say that,
(136000 - 0.5x)/100000 = 1.2
or,
x = $32000.
Thus the value of stock B is $32000.
Thus the value of stock C shall be $100000 - 40000 -32000 = $ 28000.
Ans : The value of Stock C in the portfolio is $28000.
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