Answer:
0.8735
Explanation:
Data provided in the question:
Stock Weight Beta
A 40% 1.16
B 15% 1.47
A 45% 0.42
Now,
The Portfolio beta = ∑ (Stock beta × Stock investment weights )
Therefore,
The Portfolio beta = ( 0.4 × 1.16 ) + ( 0.15 × 1.47 ) + ( 0.45 × 0.42 )
or
The Portfolio beta = 0.464 + 0.2205 + 0.189
or
The Portfolio beta = 0.8735