Problem: Which of the three models (dividend growth, CAPM, or APT) is the best one for estimating the required rate of return (or discount rate) of Under Armour?
Explain the challenge of estimating or coming with a good feel for the "cost of equity capital" or the rate of return that you feel Under Armour investors require as the minimum rate of return that they expect of require Under Armour to earn on their investment in the shares of the company.