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ama-yang · 2023年12月21日

根据题目的描述,更像是 Δy ÷ Δi

NO.PZ2019100901000020

问题如下:

MegaWorld Bancorp has an equity capital ratio for financial assets of 9%. The modified duration of its assets is 2.0 and of its liabilities is 1.5. Over small changes, the yield on liabilities is expected to move by 85 bps for every 100 bps of yield change in its asset portfolio.
Compute the modified duration of the bank’s equity capital.

选项:

解释:

Using Equation 8, A ÷ E = 1/0.09 = 11.11; (A ÷ E) –1 = 10.11; D*A = 2.0; DL* =
1.5; and Δ
i ÷ Δy = 0.85.
Therefore, the modified duration of shareholders’ capital is:

DE* = (11.11 × 2) – (10.11 × 1.50) × 0.85 = 9.33

如题目中的描述,the yield on liabilities is expected to move by 85 bps for every 100 bps of yield change in its asset portfolio. 我的理解是,yield on asset 每变化 100bps, yield on liability 就变化 85bps,

为什么不是 Δi (yiled change in asset) ÷ Δy (yiled change in liability) = 100/85? 而是 85/100=0.85?


谢谢

2 个答案

lynn_品职助教 · 2024年06月03日

嗨,从没放弃的小努力你好:


不用写公式,24年新考纲明确了不用写公式

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lynn_品职助教 · 2023年12月21日

嗨,努力学习的PZer你好:


如题目中的描述,the yield on liabilities is expected to move by 85 bps for every 100 bps of yield change in its asset portfolio. 我的理解是,yield on asset 每变化 100bps, yield on liability 就变化 85bps,


为什么不是 Δi (yiled change in asset) ÷ Δy (yiled change in liability) = 100/85? 而是 85/100=0.85?


因为负债端利率变动是△i,而资产是△y。


这道题是已知银行的杠杆率(equity capital ratio for financial assets of 9%)、资产的Duration、负债的Duration、负债利率变动对资产利率变动的敏感度(the yield on liabilities is expected to move by 85 bps for every 100 bps of yield change in its asset portfolio),然后让求Equity的Duration。


本题就是资产的利率每变100bps,负债的利率会变动85bps(85 bps for every 100 bps ),这样的话,如果资产的利率变动1bp,我们就知道负债的利率变动0.85bps。同学到这里理解都是对的,后面公式记反了。




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Xiaochong · 2024年06月02日

助教你好, 请问这样的题如果在考试中遇到, 会要求吧公式写出来吗(类似你贴的图这种)还是只要显示计算带数字比如我这种就OK? A ÷ E = 1/0.09 = 11.11 (A ÷ E) –1 = 10.11; Duration of equity= A/Ex asset duration- A/E x liability duration --> 11.11*2 - 10.11* 1.5*0.85= 9.33

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