[教材、Notes、资料] 关于固定收益notes的P122页的几道题,主要是算EAY和BEY的~~~~~~

题一、An analyst observes a Widget&CO. 7.125%,4-year,semiannual-pay bond trading at 102.347% of par(where par=$1000). The bond is callable at 1010 in two years,and putable at 1000 in two years.

问题：

1、what is the bond's yield to call

notes后面的解答为：N=4, FV=1010,PMT=35.625,PV=-1023.47,用计算器算出I/Y=3.167*2=6.334%

可是这个债券是半年一付息，所以应该是用N=8来算阿？？

题二、An analyst determines that the cash flow yield of GNMA Pool 3856 is 0.382% per month.what is the bond equivalent yield?

notes后面的解答为：[(1+0.382%)的六次方-1]*2=4.628%

可是如果用(1+0.382%)的12次方-1=4.68%这样来算行不行呢？