Is there a way I can calculate the amount of deficiency or excess on the calculator? or is it simply Par value - price of bond? So this is the question: the coupon rate on a bond is 4% and the payment is made once a year. If the time-to-maturity is five years and the market discount rate is 6%, 100 of par value can you please tell me what do i input in calculator to to get −8.425?