Answer:the Cost of equity when the capital structure is changed to 50% debt and 50% equity is 16.546%..
Step-by-step explanation:
Let the Beta be x
Cost of equity (CAPM) = risk free rate + Beta (Market risk premium)
15% = 4% + x (6%)
15%-4% = x (6%)
11% = 6%x
x = Beta =11%/6%=1.83
Debt Equity ratio
= Debt /Equity
=40% ÷ 60%
= 0.667
Beta levered = Beta unlevered [1 + (1 - tax rate) Debt equity ratio]
1.83= Beta Unlevered [1 + (1 - 40%) × 0.667)]
1.83= Beta Unlevered [1 +60% x 0.667)
1.83= Beta Unlevered (1.4002)
Beta unlevered = 1.83/1.4002=1.3069
Now when debt =50% and equity = 50%
The Beta at new required capital structure would be
Debt Equity ratio
= Debt ÷ Equity
=50% /50%
= 1
Beta levered = Beta unlevered (1 + (1 - tax rate) Debt equity ratio)
Beta levered = 1.3069 (1 + (1 - 40%) × 1)
Beta levered = 1.3069(1 +0.6
Beta levered = 2.09104
CAPM Cost of equity = risk free rate + Beta ( Market risk premium)
Cost of equity = 4% + 2.09104 (6%)
Cost of equity = 13.04%
Therefore, the Cost of equity when the capital structure is changed to 50% debt and 50% equity is 16.546%.