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西红柿面 · 2024年08月13日

虽然不影响计算结果,但是这里难道不应该用365天/年来算吗

NO.PZ2023020101000010

问题如下:

Three months ago (90 days), Kim purchased a bond with a 3% annual coupon and a maturity date of seven years from the date of purchase. The bond has a face value of US$1,000 and pays interest every 180 days from the date of issue. Kim is concerned about a potential increase in interest rates over the next year and has approached Riley for advice on how to use forward contracts to manage this risk. Riley advises Kim to enter into a short position in a fixed-income forward contract expiring in 360 days. The annualized risk-free rate now is 1.5% per year and the price of the bond with accrued interest is US$1,103.45.

Based on a 360-day year, the price of the forward contract on the bond purchased by Kim is closest to

选项:

A.

US$1,082.

B.

US$1,090.

C.

US$1,120.

解释:

Note that time 0 is the forward contract initiation date, that is, 90 days after the purchase of the bond. Time T is the contract expiration date, that is, 360 days.

The forward contract price follows:

F0(T) = FV0,T [S0 – PVCI0,T]

Present value (PV) of coupons = PVCI0,T = 15/(1.015)90/360 + 15/(1.015)270/360 = 14.944 + 14.833 = US$29.778

F0(T) = (1103.45 – 29.778)(1.015)360/360 = US$1,090.

协会教材在这里写的有矛盾,参见下面两个公式,一个是需要调整AIT,但是另一个又不需要进行调整。



根据它的题目来看就是如果是根据标的资产的价格去求FP,那就不要减去AIT,但是如果要求QFP,就还需要减去AIT之后做转换.

虽然不影响计算结果,但是这里难道不应该用365天/年来算吗?

2 个答案
已采纳答案

李坏_品职助教 · 2024年08月13日

嗨,爱思考的PZer你好:


建议看看李老师之前在知乎发的这个帖子:https://www.zhihu.com/question/23351169/answer/2634170546


  1. 题目有要求的,按照题目要求来,真实考试中一般都会给出明确要求。
  2. 题目没有要求的,如果是涉及到libor的计算题,比如FRA或者interest rate swap,就用360天。其他的衍生品用365天。



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努力的时光都是限量版,加油!

李坏_品职助教 · 2024年08月13日

嗨,努力学习的PZer你好:


本题最后写了一句“Based on a 360-day year,”,这个意思就是让你一年按照360天来计算。

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虽然现在很辛苦,但努力过的感觉真的很好,加油!

西红柿面 · 2024年08月13日

有什么总结吗?比如AP是用365天来计算;FRA是用360天来计算;Annualized用365来算之类的?

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