问题如下：
George bought a bond with the remaining maturity of two years. The par value of the bond is 1000. The coupon rate is 4%, and the interest is paid annually. The market discount rate is 4.5%. What is the price of the bond?
选项：
A.913.0
B.1000.0
C.990.6
解释：
C is correct.
N=2；FV=1000；PMT=40；I/Y=4.5 → PV= -990.6
为什么PMT=40？？？
