Answer:
the beta of the second stock is 1.77
Explanation:
The beta of the second stock is shown below;
Investment in each = (1 ÷ 3)
Now as we know that
Portfolio beta = Respective investments × Respective weights
1 = (1 ÷ 3 × 1.23) + (1 ÷ 3 × beta of the second stock) + (1 ÷ 3 × 0)
We assume the Beta of risk-free assets would be zero
1 = 0.41 + (1 ÷ 3 × beta of the second stock)
The beta of the second stock is
= (1 - 0.41) × 3
= 1.77
Hence, the beta of the second stock is 1.77