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Infinite · 2023年06月11日

画图法的互换利率为什么用的是1.82%

NO.PZ2019010402000009

问题如下:

A dealer entered into a three-year interest rate swap with annual payments one year ago as a floating receiver. The current equilibrium fixed swap rate is 1.4853% (one year after the swap was originally entered). The initial swap rate is 1.82% and notional principle is $100 million.The value of this swap is:

选项:

A.

-670,598

B.

656,338

C.

-656,338

解释:

C is correct.

考点:interest swap 求value

解析:

Present Value Factor 1 = 11+1%×360360=0.990099\frac1{1+1\%\times\frac{360}{360}}=0.990099

Present Value Factor 2 = 11+1.5%×720360=0.970874\frac1{1+1.5\%\times\frac{720}{360}}=0.970874

Ÿ投资者之前的合约是收浮动,付固定,现在进入反向合约,即收固定,付浮动。浮动端可以抵消,剩下的就是收新的固定利率,付之前合约中约定的swap rate。

Ÿ向上箭头:current equilibrium fixed swap rate,也就是以现在的市场条件签订一个到期日相同的合约的swap rate,它等于1.4853%。而且我们注意到,这是一个均衡的swap rate。Swap rate即固定利率,它可以看成是市场中浮动利率的打包价。所谓均衡就是说是无套利情况下计算出来的固定利率,即与interest swap rate的定价是一样的,就算题目没有告诉我们current equilibrium fixed swap rate,我们也能计算:

10.9708740.990099+0.970874=1.4853%\frac{1-0.970874}{0.990099+0.970874}=1.4853\%

Ÿ 每一期的差额=1.4853%-1.82%(最后一期的本金相互抵消),然后向前折现,折现因子已经求出,分别为0.990099和0.970874,所以:(1.4853%1.82%)×(0.990099+0.970874)×100,000,000=656,338(1.4853\%-1.82\%)\times(0.990099+0.970874)\times100,000,000=-656,338

Q1.画图2发的swap rate 说的是initially的利率,画图发用不上current 1.4853%那个利率了?

Q2。A manger entered into a receive-fixed and pay-equity swap three months ago.

按照这个头寸判断 是long position,为啥第一张图上画的向上箭头是float rate(重新定价法),这不是说了收到的是FIXED rate吗?

1 个答案

Lucky_品职助教 · 2023年06月11日

嗨,努力学习的PZer你好:


问题1:确实,画图法计算interest swap price只需要知道initially的利率,而不需要知道current equilibrium fixed swap rate。所以图中只需要画出initially的固定利率和浮动利率即可。

问题2:老师讲课过程中,所有向上箭头都是float rate,判断头寸后自己再反一下就行,不然一会儿向上箭头,一会儿向下箭头容易混乱,所以统一都是long的角度,向上是浮动,向下是固定

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努力的时光都是限量版,加油!

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NO.PZ2019010402000009问题如下 A aler entereinto a three-yeinterest rate swwith annupayments one yeago a floating receiver. The current equilibrium fixeswrate is 1.4853% (one yeafter the swworiginally entere. The initiswrate is 1.82% annotionprinciple is $100 million.The value of this swis: A.-670,598B.656,338C.-656,338 C is correct.考点interest sw求value解析Present Value Factor 1 = 11+1%×360360=0.990099\frac1{1+1\%\times\frac{360}{360}}=0.9900991+1%×360360​1​=0.990099 Present Value Factor 2 = 11+1.5%×720360=0.970874\frac1{1+1.5\%\times\frac{720}{360}}=0.9708741+1.5%×360720​1​=0.970874Ÿ投资者之前的合约是收浮动,付固定,现在进入反向合约,即收固定,付浮动。浮动端可以抵消,剩下的就是收新的固定利率,付之前合约中约定的swrate。Ÿ向上箭头current equilibrium fixeswrate,也就是以现在的市场条件签订一个到期日相同的合约的swrate,它等于1.4853%。而且我们注意到,这是一个均衡的swrate。Swrate即固定利率,它可以看成是市场中浮动利率的打包价。所谓均衡就是说是无套利情况下计算出来的固定利率,即与interest swrate的定价是一样的,就算题目没有告诉我们current equilibrium fixeswrate,我们也能计算 1−0.9708740.990099+0.970874=1.4853%\frac{1-0.970874}{0.990099+0.970874}=1.4853\%0.990099+0.9708741−0.970874​=1.4853%Ÿ 每一期的差额=1.4853%-1.82%(最后一期的本金相互抵消),然后向前折现,折现因子已经求出,分别为0.990099和0.970874,所以(1.4853%−1.82%)×(0.990099+0.970874)×100,000,000=−656,338(1.4853\%-1.82\%)\times(0.990099+0.970874)\times100,000,000=-656,338(1.4853%−1.82%)×(0.990099+0.970874)×100,000,000=−656,338 题干写的是收浮方,为啥说进入了反向合约。

2024-09-15 12:44 1 · 回答

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2024-08-21 23:04 1 · 回答

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2024-05-04 14:48 1 · 回答

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2024-04-14 11:30 1 · 回答

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2024-04-13 20:20 1 · 回答