Answer:
the yield that must offer for the investor in order to prefer them is 4.2%
Step-by-step explanation:
The computation is shown below:
The after tax yield is
= Corporate bond yield × (1 - tax rate)
= 6% × (1 - 0.30)
= 6% × 0.70
= 4.2%
hence, the yield that must offer for the investor in order to prefer them is 4.2%
The same is relevant