Answer:
The expected return and beta on the portfolio be after the purchase of the Alpha stock will be 11.20%; 1.23
Explanation:
Provided data;
90000 value portfolio with expected returns of 11% and beta of 1.20
($10 × 1000) = 10000 value Alpha Corp added with expected returns of 13% and beta of 1.50.
The new expected portfolio return =
rp = 0.1 × 13% + 0.9 × 11%
rp = 0.1 × 0.13 + 0.9 × 0.11
= 11.20%
The new expected portfolio beta =
bp = 0.1 × 1.50 + 0.9 × 1.20
bp = 1.23