Question

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Exercise 4: Consider an Australian financial institution which has Swiss Franc denominated assets worth 50 million...

Exercise 4:

Consider an Australian financial institution which has Swiss Franc denominated assets worth 50 million CHF and USD denominated liabilities worth 1 million USD. The past exchange rates in over the past 10 months are:

a) Measure the exposure: Calculate the value of the position in AUD.

b) Measure the sensitivity: Calculate the change (in AUD) in the CHF position for a 1% increase in the value of the Swiss Franc. Calculate the change (in AUD) in the USD position for a 1% increase in the value of the USD.

c) Calculate the past changes in the exchange rate in %.
d) Re-evaluate the portfolio position with the past changes in the exchange rate. e) Calculate the Value at Risk for the next month and α = 10%
f) Calculate the Value at Risk for the next month and α = 20%

Month

0

1

2

3

4

5

Swiss exchange rate (AUD x)/ CHF

1.25

1.20

1.23

1.28

1.31

1.24

US exchange rate (AUD x)/ USD

1.38

1.40

1.46

1.53

1.47

1.47

Month

6

7

8

9

10 (today)

Swiss exchange rate (AUD x)/ CHF

1.18

1.08

1.21

1.27

1.32

US exchange rate (AUD x)/ USD

1.40

1.32

1.39

1.31

1.27

Solutions

Expert Solution

a
Value of position in AUD today-
Position Position value (foreign currency) Exchange rate Position value in AUD
Assets (CHF)       50,000,000                   1.32       66,000,000
Liability (USD)          1,000,000                   1.27          1,270,000
Net       64,730,000
b
Sensitivity of the position-
Position Position value (foreign currency) Exchange rate Position value in AUD +1% change in position Position value in AUD -1% change in position Position value in AUD
Assets (CHF)       50,000,000                   1.32       66,000,000       50,500,000       66,660,000       49,500,000       65,340,000
Liability (USD)          1,000,000                   1.27          1,270,000          1,010,000          1,282,700             990,000          1,257,300
Net       64,730,000       65,377,300       64,082,700
Change in position             647,300           (647,300)
Change in position 1.00% -1.00%
c
% changes in past exchange rates
Month 0 1 2 3 4 5 6 7 8 9 10 (today)
Swiss exchange rate (AUD x)/ CHF 1.25 1.2 1.23 1.28 1.31 1.24 1.18 1.08 1.21 1.27 1.32
US exchange rate (AUD x)/ USD 1.38 1.4 1.46 1.53 1.47 1.47 1.4 1.32 1.39 1.31 1.27
% change in Swiss exchange rate -4.00% 2.50% 4.07% 2.34% -5.34% -4.84% -8.47% 12.04% 4.96% 3.94%
% change in US exchange rate 1.45% 4.29% 4.79% -3.92% 0.00% -4.76% -5.71% 5.30% -5.76% -3.05%
d
Past portfolio position
Position Position value (foreign currency)
Assets (CHF)       50,000,000
Liability (USD)          1,000,000
Month 0 1 2 3 4 5 6 7 8 9 10 (today)
Swiss exchange rate (AUD x)/ CHF 1.25 1.2 1.23 1.28 1.31 1.24 1.18 1.08 1.21 1.27 1.32
US exchange rate (AUD x)/ USD 1.38 1.4 1.46 1.53 1.47 1.47 1.4 1.32 1.39 1.31 1.27
Asset value in AUD       62,500,000       60,000,000       61,500,000       64,000,000       65,500,000       62,000,000       59,000,000       54,000,000       60,500,000       63,500,000       66,000,000
Liability value in AUD          1,380,000          1,400,000          1,460,000          1,530,000          1,470,000          1,470,000          1,400,000          1,320,000          1,390,000          1,310,000          1,270,000
Net Portfolio value       61,120,000       58,600,000       60,040,000       62,470,000       64,030,000       60,530,000       57,600,000       52,680,000       59,110,000       62,190,000       64,730,000

e, f
The VAR can be calculated by multiple methods. We will calculate the VAR value by 2 methods
Historical returns method-

Returns from lowest to highest       52,680,000       57,600,000       58,600,000       59,110,000       60,040,000       60,530,000       61,120,000       62,190,000       62,470,000       64,030,000       64,730,000

VAR at alpha= 10% is the lowest 10% return value. In this case, there are 11 values, Hence, 10% of 11 is 1.1. We take the 1st and the 2nd lowest return and extrapolate
52,680,000+ 0.1* (57,600,000-52,680,000)
53,172,000
VAR= 64730000- 53172000
11,558,000
Hence, 10% VAR= 11,558,000

VAR at alpha= 20% is the lowest 20% return value. In this case, there are 11 values, Hence, 20% of 11 is 2.2. We take the 2nd and the 3rd lowest return and extrapolate
57,600,000+ 0.2*(58,600,000-57,600,000)
57,800,000
VAR= 64730000- 57800000
6,930,000
Hence, 20% VAR= 6,930,000


Parametric (mean-std dev) method
Average portfolio returns over 10- months
3.90%
Std dev of return over 10-months
4.46%

Alpha= 10%
Min Return with 90% prob -1.8157 =NORM.INV(10%,3.9%,4.46%)
Value of Portfolio      (52,801,554) =64,730,000*(1-1.8157)
Value at Risk       11,928,446 =64,730,000-52,801,554
Alpha= 20%
Min Return with 80% prob             (0.1464) =NORM.INV(20%,3.9%,4.46%)
Value of Portfolio       55,255,515 =64,730,000*(1-1.1464)
Value at Risk          9,474,485 =64,730,000-55,255,515

Based on the flow of question asked in the problem, I suggest historical VAR is the expected method for providing the answer. We were asked to provide values of portdolio for historical period. This would suggest a VAR calculation based on historical values.


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