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小菜菜 · 2024年06月25日

策略2的duration比策略1更短,且2是国债1是信用债,是否可以说明2比1的liquidity情况更好呢?

NO.PZ2018120301000008

问题如下:

The objectives for the domestic bond portfolio include the ability to fund future liabilities, protect interest income from short-term inflation, and minimize the correlation with the fund’s equity portfolio. The correlation between the fund’s domestic bond portfolio and equity portfolio is currently 0.14. Celia plans to reduce the fund’s equity allocation and increase the allocation to the domestic bond portfolio. She reviews two possible investment strategies.

  • Strategy 1 Purchase AAA rated fixed-coupon corporate bonds with a modified duration of two years and a correlation coefficient with the equity portfolio of -0.15.
  • Strategy 2 Purchase US government agency floating-coupon bonds with a modified duration of one month and a correlation coefficient with the equity portfolio of -0.10.
Strategy 2 is most likely preferred to Strategy 1 for meeting the objective of:

选项:

A.

protecting against inflation.

B.

funding future liabilities.

C.

minimizing the correlation of the fund’s domestic bond portfolio and equity portfolio.

解释:

Correct Answer: A

A is correct. Floating-coupon bonds provide inflation protection for the interest income because the reference rate should adjust for inflation. The purchase of fixed-coupon bonds as outlined in Strategy 1 provides no protection against inflation for either interest or principal.

Strategy 1 would instead be superior to Strategy 2 in funding future liabilities (better predictability as to the amount of cash flows) and reducing the correlation between the fund’s domestic bond portfolio and equity portfolio (better diversification).

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发亮_品职助教 · 2024年06月26日

嗨,从没放弃的小努力你好:


就题干的信息还不能说明债券2的流动性更好。


因为债券2是一个floating rate bond,浮动利率债券的duration都很小的,一般我们认为近似等于0。或者近似计算看,浮动利率债券的Duration等于(2个付息日间的时长)/2,如每半年付息一次,则2个付息日之间的时长是0.5年,则这个浮动利率债券的Duration就近似地等于0.5/2=0.25,这都是很小的duration数据。


债券1是一个固定利率债券,他的Duration天然就比浮动利率债券要大,所以不能就下结论说债券1因为duration更大 → 期限更长,所以流动性更差。

一支固定利率债券,一支浮动,他们2个债券的Duration比较不再一个起平点上。

如果债券1和债券2都是固定利率债券,这时候债券2的duration更小,那我们有可能推断,是因为债券2的期限更短,所以其duration更小,在其他条件一样的背景下,期限更短则流动性更好,所以有可能可以推断出债券2的流动性更好。


第二个关于国债和公司债的比较:

在其他条件一样的背景下,国债的流动性是比公司债要好,所以从这点上看债券2的流动性更好,但注意,债券1和债券2的其他条件仍然是有差异的,其他差异都会对流动性造成影响,所以仅仅是从国债与公司债这个角度,也无法说明债券2的流动性会更好。


因为这道题不是专门考流动性的,所以给的题干信息并不适用,没办法直接分析出谁的流动性更好。

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虽然现在很辛苦,但努力过的感觉真的很好,加油!

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