Answer:
0.60 or 60%
Explanation:
Calculation of weight of the portfolio
Assume that the weight is x
x*[Beta of stock) + (1+x)*(Beta of Tbills) = 1
x * (1.68) + (1-x)*(0) = 1
1.68x + (1-x)*0 = 1
1.68x + 0 = 1
x = [1/1.68]
x = 0.5952
x = 0.60 or 60%
So, the weight of the portfolio that should be invested in the Treasury Bill is 0.60 or 60%.