问题如下图：
选项：
A. 
B. 
C. 
解释：
请问这道题目答案是不是有误？我根据二叉树算出v-是101.0386 v+ 是99.8508 effective duration是1.98 a
李宗_品职助教 · 2018年03月19日
计算过程如下：（V-为例）
105.25/(7.0037%+0.1395%)=98.23302
105.25/(5.7342%+0.1395%)=99.41090
105.25/(4.6947%+0.1395%)=100.3966 (call at 100)
(98.23302+99.41090)/2+5.25= 104.07196
(99.41090+100)/2+5.25=104.95545
104.07196/(5.1968%+0.1395%)=98.7997
104.95545/(4.2548%+0.1395%)=100.5375 (call at 100)
104.64985/(3.7%+0.1395%)=100.780387
NO.PZ201712110200000401 问题如下 Baseon Exhibits 1 an2, the effective ration for the bonis closest to: A.1.98. B.2.15. C.2.73. B is correct. The bons value if interest rates shift wn 30 bps (PV–) is 100.78. The bons value if interest rates shift up 30 bps (PV+) is 99.487.Effective ration=[(PV-)-(PV+)]/[2× (ΔCurve) × (PV0)]= (100.780 - 99.487)/ (2 × 0.003 × 100.200)=2.15 bons value if interest rates shift wn 30 bps (PV–) 我算的不是 100.78，而是101.03854，算了两次都是这样，请问我哪里出错了？
NO.PZ201712110200000401 问题如下 Baseon Exhibits 1 an2, the effective ration for the bonis closest to: A.1.98. B.2.15. C.2.73. B is correct. The bons value if interest rates shift wn 30 bps (PV–) is 100.78. The bons value if interest rates shift up 30 bps (PV+) is 99.487.Effective ration=[(PV-)-(PV+)]/[2× (ΔCurve) × (PV0)]= (100.780 - 99.487)/ (2 × 0.003 × 100.200)=2.15 老师您好，我看原教材解析里面都懒得写计算全过程了...... 一般考试中会出现这么繁琐的计算么
NO.PZ201712110200000401问题如下Baseon Exhibits 1 an2, the effective ration for the bonis closest to:A.1.98.B.2.15.C.2.73.B is correct. The bons value if interest rates shift wn 30 bps (PV–) is 100.78. The bons value if interest rates shift up 30 bps (PV+) is 99.487.Effective ration=[(PV-)-(PV+)]/[2× (ΔCurve) × (PV0)]= (100.780 - 99.487)/ (2 × 0.003 × 100.200)=2.15对于含权债券如何判断题目给的现金流是否含权，什么时候需要在分母加oas
NO.PZ201712110200000401 问题如下 Baseon Exhibits 1 an2, the effective ration for the bonis closest to: A.1.98. B.2.15. C.2.73. B is correct. The bons value if interest rates shift wn 30 bps (PV–) is 100.78. The bons value if interest rates shift up 30 bps (PV+) is 99.487.Effective ration=[(PV-)-(PV+)]/[2× (ΔCurve) × (PV0)]= (100.780 - 99.487)/ (2 × 0.003 × 100.200)=2.15 老师上课说过，OAS是剔除了权利影响的sprea分子的现金流已经包含了权利影响了。那为什么还可以在二叉树的利率上直接加OAS，但是现金流又还是按照初始的coupon rate来计算呢？
NO.PZ201712110200000401 问题如下 Baseon Exhibits 1 an2, the effective ration for the bonis closest to: A.1.98. B.2.15. C.2.73. B is correct. The bons value if interest rates shift wn 30 bps (PV–) is 100.78. The bons value if interest rates shift up 30 bps (PV+) is 99.487.Effective ration=[(PV-)-(PV+)]/[2× (ΔCurve) × (PV0)]= (100.780 - 99.487)/ (2 × 0.003 × 100.200)=2.15 例如上图是辅导老师的解题过程，V+在year2，既然折现率4.9377%小于coupon rate，作为callable，为什么不直接取100呢而是99.7114？
