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Yaq7 · 2021年10月28日

老师,这是答案是负数,即sell -84份contracts,是不是意思是要买?

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, the number of stock index futures needed to sell is? Based on the following information:

  • ŸThe stock index value is at 1,200, multiplier is $250, the beta is 0.95
  • ŸThe 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)

因此,需要卖出84份股票期货合约。

做出来答案没问题,想确认一下解释

1 个答案

Hertz_品职助教 · 2021年10月29日

嗨,从没放弃的小努力你好:


同学你好~

不是的哈

1.     原则是这样:根据下面这个公式计算出结果,当结果为正,则买;当结果为负,则卖。

2.     这也可以从公式中检验一下,当βT>βS的时候,这个结果是正数,即我们应该买入。这也是符合逻辑的,因为我们要调增β,买入期货合约才能达到这个目的嘛,反之亦然。


----------------------------------------------
虽然现在很辛苦,但努力过的感觉真的很好,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/?

2023-08-27 15:43 1 · 回答

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.-88B.-84C.-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) 在一些具体数据上不知道哪个ration用在谁的BPV上,可以展示一下具体的过程吗?谢谢

2023-02-12 22:29 1 · 回答

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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