问题如下图：
选项：
A. 
B. 
C. 
解释：
老师 这道题没看懂，求解答
NO.PZ2016031002000021 问题如下 Whiof the following statements is most accurate about spot rate? A.Spot rate is a scount rate for a single future payment. B.Spot rate reflects the coupon rate tha hypotheticboneamaturity woulneeto have to pricepar. C.Spot rate is interest rate for a future perio sua 1 yerate 1 yefrom now. A is correct.Spot rate is a scount rate for a single future payment. Prate reflects the coupon rate tha hypotheticboneamaturity woulneeto have to pricepar. Forwarrate is interest rate for a future perio考点spot rate解析对于单一的future payment，我们折现到现在使用的折现率是spot rate，故A正确。B描述的是prate的定义，使得债券价值等于面值时的coupon rate，故B不正确。C描述的是forwarrate，代表的是将来某一段时间的利率，故C不正确。 如题
哪里讲过prate？看了之前提问的还是不懂。
请问老师b如何理解？prate这个概念是什么意思呢？
