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pinzhi7777 · 2023年01月11日

你好,对这道题的解题思路,存在疑问。

NO.PZ2022051904000006

问题如下:

In its quarterly policy and performance review, the investment team for the Peralandra University endowment identified a tactical allocation opportunity in international developed equities. The team also decided to implement a passive 1% overweight ($5 million notional value) position in the asset class. Implementation will occur by either using an MISC EAFE Index ETF in the cash market or the equivalent futures contract in the derivatives market.

The team determined that the unlevered cost of implementation is 27 basis points in the cash market (ETF) and 32 bps in the derivatives market (futures). This modest cost differential prompted a comparison of costs on a levered basis to preserve liquidity for upcoming capital commitments in the fund’s alternative investment asset classes. For the related analysis, the team’s assumptions are as follows:

  • Investment policy compliant at 3 times leverage
  • Investment horizon of one year
  • 3-month Libor of 1.8%
  • ETF borrowing cost of 3-month Libor plus 35 bps
Q. Recommend the most cost-effective strategy. Justify your response with calculations of the total levered cost of each implementation option.

选项:

解释:

Solution

As the lower cost alternative, the endowment’s investment team should implement the 1% overweight position using futures.

The additional cost of obtaining leverage for each option is as follows:ETF: ($5 million × 0.6667 × 2.15%) / $5 million = 1.43% (or 143 bps) and Futures: ($5 million × 0.6667 × 1.80%) / $5 million = 1.20% (or 120 bps),

where the inputs are derived as follows:0.6667 reflects the 3 times leverage factor (66.67% borrowed and 33.33% cash usage), 2.15% reflects the ETF borrowing rate (3-month Libor of 1.80% + 35 bps), and 1.80% reflects the absence of investment income offset (at 3-month Libor) versus the unlevered cost of futures implementation.

The total levered cost of each option is the sum of the unlevered cost plus the additional cost of obtaining leverage:ETF: 27 bps + 143 bps = 170 bps and Futures: 32 bps + 120 bps = 152 bps.

This 18 bps cost advantage would make futures the appropriate choice for the endowment’s investment team.

最终成本的比计较,取决于2个方面:①获得杠杆的成本+②在2个市场交易的成本

对于①获得杠杆的成本,可能有些异议。


关于①,在ETF获得杠杆的成本,我的理解,有2个途径。

途径1:利用1元cash作为margin,借入2元的ETF,获得3元的ETF敞口。

途径2:利用1元本金作为margin,在libor市场借入2元cash,并直接购买3元的ETF产品,获得3元的ETF敞口。


答案直接假设了途径1。

但是,在future市场加杠杆的方法,答案采用的是途径2的思路(在LIBOR市场借入cash,然后买入future)


途径1,其成本应该是更低的,也就是 (5M*0.667*1.8%)/5M=1.2%。

这里,1.8%是3m libor的成本。


请问一下,我对答案理解是否正确,即

  1. 在ETF市场获得杠杆,默认的是采用途径1,而没有用途径2?
  2. 实际上,也可以采用途径2,获得3被杠杆的ETF敞口?
  3. 因为题目暗示的ETF 借贷利率,所以采用了途径1的计算方法?
  4. 如果题目也暗示了future的借贷利率,那么future的成本,也要采用途径1的方法?
1 个答案

lynn_品职助教 · 2023年01月12日

嗨,从没放弃的小努力你好:


这道题是原版书Reading 28 Case Study in Portfolio Management: Institutional的一道课后题。


Recommend the most cost-effective strategy. Justify your response with calculations of the total levered cost of each implementation option.


题目让计算一下考虑杠杆后的成本,推荐一个最省成本的策略。就是在计算cost的时候考虑借钱的成本。


· Investment policy compliant at 3 times leverage


这个信息只用来计算leverage cost,直接加起来就可以,而不是: 27 bps × 33.33% + 143 bps × 0.6667。


视频在课后题Reading28 Question8~9八分钟(两倍速处),整个知识点角度挺奇特的,同学稍稍看一下就可以了不需要花太多时间。


请问一下,我对答案理解是否正确,即

  1. 在ETF市场获得杠杆,默认的是采用途径1,而没有用途径2?
  2. 实际上,也可以采用途径2,获得3被杠杆的ETF敞口?
  3. 因为题目暗示的ETF 借贷利率,所以采用了途径1的计算方法?
  4. 如果题目也暗示了future的借贷利率,那么future的成本,也要采用途径1的方法?


是的,同学大体上是对的,如果题目也暗示了future的借贷利率,这要看题干具体怎么写了,因为书上没有在其他地方讲到这个知识点,我们只能仔细读题,而且这个计算应该没有“标准”做法,用什么利率也是因为这个利率最合适。

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