Answer: Par
Explanation:
The credit spread measures the difference between the risk free rate/ yield for a certain type of security and the yield the security offers.
The credit spread here is 1.50%.
The risk free rate is 3.5%.
The expected yield in the market for the type of security you are issuing is therefore:
= 3.5% + 1.50%
= 5.00%
Your Baa bond is expected to have a yield of 5% which is the coupon rate you are issuing it at.
Bond will therefore be issued at Par which is what happens when the Coupon and the Yield are equal.