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梦阳紫依 · 2023年02月12日

number of bond index future怎么求?

NO.PZ2018113001000003

问题如下:

A $100 million pension fund with 80% stock and 20% bond. The beta of equity portion is 1.2 and the duration of bond portion is 5.0. In order to adjust the allocation to 60% stock and 40% bond.

Calculate the number of stock index futures needed to buy.

Based on the following information:

  • The stock index value is at 1,200, multiplier is $250, the beta is 0.95
  • The price of bond futures contract is $105,300 with an implied modified duration of 6.5.

选项:

A.

-88

B.

-84

C.

-95

解释:

B is correct.

考点:用futures contract 调整组合的头寸

解析:

现需要将股票头寸从80%降至60%,即需要将20%*100,000,000=$20,000,000的股票的beta调整为0(转成cash)

需要的stock index futures contract数量为:

Nf=(βTβSβf)(Sf)=(0.001.200.95)($20,000,0001,200×$250)=84.21(84rounded)N_f=(\frac{\beta_T-\beta_S}{\beta_f})(\frac Sf)=(\frac{0.00-1.20}{0.95})(\frac{\$20,000,000}{1,200\times\$250})=-84.21(-84rounded)

负号代表卖出,即需要卖出84份股票期货合约, 对应的也就是买入(-84)份合约,选B。

(注意,本题中问的是需要的股指期货合约的份数,因此关于债券的信息是用不到的)

在一些具体数据上不知道哪个duration用在谁的BPV上,可以展示一下具体的过程吗?谢谢

1 个答案

lynn_品职助教 · 2023年02月14日

嗨,从没放弃的小努力你好:


在本题进行资产配置,也就是降低股票头寸,提高债券头寸的过程中,只需要将本来是股票头寸但是需要变成债券头寸的那部分进行操作。


打个简单的比方,本来股票和债券都是50块,但是现在想要把股票变成40,债券变成60.那是不是只需要将原来是股票的那10块钱的头寸,先变成现金再变成债券就可以了呀。


所以本题也是这样子的,不论是一开始使用股指期货合约降低β,还是之后使用债券期货增加久期,都只需要针对需要调节的那部分头寸,


股票转换成现金,所以是0-1.2

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就算太阳没有迎着我们而来,我们正在朝着它而去,加油!

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NO.PZ2018113001000003 问题如下 A $100 million pension funwith 80% stoan20% bon The beta of equity portion is 1.2 anthe ration of bonportion is 5.0. In orr to aust the allocation to 60% stoan40% bon Calculate the number of stoinx futures neeto buy. Baseon the following information: The stoinx value is 1,200, multiplier is $250, the beta is 0.95 The priof bonfutures contrais $105,300 with impliemofieration of 6.5. A.-88 B.-84 C.-95 B is correct.考点用futures contra调整组合的头寸解析现需要将股票头寸从80%降至60%,即需要将20%*100,000,000=$20,000,000的股票的beta调整为0(转成cash)需要的stoinx futures contract数量为Nf=(βT−βSβf)(Sf)=(0.00−1.200.95)($20,000,0001,200×$250)=−84.21(−84rounN_f=(\frac{\beta_T-\beta_S}{\beta_f})(\frSf)=(\frac{0.00-1.20}{0.95})(\frac{\$20,000,000}{1,200\times\$250})=-84.21(-84rounNf​=(βf​βT​−βS​​)(fS​)=(0.950.00−1.20​)(1,200×$250$20,000,000​)=−84.21(−84roun负号代表卖出,即需要卖出84份股票期货合约, 对应的也就是买入(-84)份合约,选(注意,本题中问的是需要的股指期货合约的份数,因此关于债券的信息是用不到的) The priof bonfutures contrais $105,300 with impliemofieration of 6.5.这个条件用不上对吗?为什么这里用beta算不用ration算呢/?

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NO.PZ2018113001000003 问题如下 A $100 million pension funwith 80% stoan20% bon The beta of equity portion is 1.2 anthe ration of bonportion is 5.0. In orr to aust the allocation to 60% stoan40% bon the number of stoinx futures neeto sell is? Baseon the following information: ŸThe stoinx value is 1,200, multiplier is $250, the beta is 0.95 ŸThe priof bonfutures contrais $105,300 with impliemofieration of 6.5. A.-88 B.-84 C.-95 B is correct.考点用futures contra调整组合的头寸解析现需要将股票头寸从80%降至60%,即需要将20%*100,000,000=$20,000,000的股票的beta调整为0(转成cash)需要的stoinx futures contract数量为Nf=(βT−βSβf)(Sf)=(0.00−1.200.95)($20,000,0001,200×$250)=−84.21(−84rounN_f=(\frac{\beta_T-\beta_S}{\beta_f})(\frSf)=(\frac{0.00-1.20}{0.95})(\frac{\$20,000,000}{1,200\times\$250})=-84.21(-84rounNf​=(βf​βT​−βS​​)(fS​)=(0.950.00−1.20​)(1,200×$250$20,000,000​)=−84.21(−84roun因此,需要卖出84份股票期货合约。 老师好 怎么问法是 用40MM (=20M +20M)来做?像课上例题 3.1(截图)中把 50M +50M = 100M 来转?

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