since no one else has replied, i will guess:
If borrowing is allowed the a negative allocation of one asset is possible, the only constraint is w1+w2=1
So i have to plot the feasible set for two risky assets on excel as my first question, where the user inputs everything but the weights.
So I have done weights 0-1 in steps of 0.05
I thought I had done it correct but then my next question is:
Plot the set of all portfolios in the feasible set that do not require negative
weights, i.e. for which w1,w2>= 0.
I'm very confused as I thought I did this in question 1. What have i done wrong?
My graph for question 1 looks like a curve in the shape of a c.