Answer:
8.38%
Explanation:
We use the RATE formula in this question which is presented on the attachment below:
Given that,
Present value = $1,139
Future value or Face value = $1,000
PMT = 1,000 × 9.9% ÷ 2 = $49.50
NPER = 18 years × 2 = 36 years
The formula is shown below:
= Rate(NPER;PMT;-PV;FV;type)
The present value come in negative
So, after solving this, the coupon rate is
= 4.19% × 2
= 8.38%