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粗眉毛辣椒油 · 2024年03月05日

做题思路

NO.PZ2019052801000038

问题如下:

The price of a bond is $1,058, it has a coupon payment of $30 every six mouths, the last payment is three mouths ago. The continuous interest rate is 5%. Calculate the forward price of a 6-month forward contract on this bond:

选项:

A.

$998.72.

B.

$1,032.21.

C.

$1,067.24.

D.

$1054.41.

解释:

D is correct.

考点:远期合约定价

解析:

PVD0=30e0.05×0.25=29.6273PVD_0=30e^{-0.05\times0.25}=29.6273\\

FP  =  (S0PVD0)erT=(105829.6273)e0.05×0.5=1054.41FP\;=\;(S_0-PVD_0)e^{rT}=(1058-29.6273)e^{0.05\times0.5}=1054.41

请问是不是计算远期合约价格和期初价格的时候都不需要考虑long还是short?

我记得老师讲课的时候,都是以long futures为例画图解释,因为FP为支出,所以cost要从FP的折现值里减掉;income为收入,所以要从PV里减掉,最后两个折现值在期初相等,算出FP。但如果是short futures,FP为收入,那是不是income要从FP的折现值里减掉,而cost要从PV里减掉呢?

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已采纳答案

李坏_品职助教 · 2024年03月06日

嗨,从没放弃的小努力你好:


对,远期价格都不需要考虑方向。


我建议从下面的角度来理解PVD和持有成本cost的处理:

计算远期价格FP的时候,现货的PVD要扣除,现货的cost(比如储存成本等等)要加上。

扣除income是因为:income是属于现货持有者才能拿到的收益,持有远期合约是拿不到的,所以这个income是远期合约的劣势,要扣掉。

cost要加上是因为:现货(比如黄金)持有者需要支付一定的cost,但是持有远期合约不需要支付现货的cost,所以这个cost是远期合约的优势,要加上cost。


远期价格是为了让交易公平合理才这样计算的,所以站在多空双方计算出来的FP是一样的。


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