sol9 - ACTSC 445: Asset-Liability Management – Fall 2008...

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Unformatted text preview: ACTSC 445: Asset-Liability Management – Fall 2008 Department of Statistics and Actuarial Science, University of Waterloo Solutions for Unit 9 Exercises 1. We have that the variance of the overall return on the portfolio, σ 2 V , is equal to 6 . 5 × 10- 5 . Therefore VaR . 99 , 5 = √ 5 × 200000 × √ 6 . 5 × 10- 5 × 2 . 33 = 8400 . 93. The sum of the VaR of the two portfolios is 2( √ 5 × 100 , 000 × . 01) × 2 . 33 = 10420 . 08, so diversification reduces VaR by 2019.14. 2. Can write dV = ∂V ∂f 1 f 1 + ∂V ∂f 2 f 2 where f 1 and f 2 are not correlated since they come from a principal components analysis. The in- formation in the problem tells us that dV = 6 f 1- 4 f 2 with a variance of 20 2 and 8 2 for f 1 and f 2 , respectively. Therefore, Var( dV ) = σ 2 V = (6 × 20) 2 + (4 × 8) 2 , and so σ V = 124 . 19. Therefore, VaR . 90 , 5 = √ 5 × 124 . 19 × 1 . 282 = 356 . 02....
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This note was uploaded on 10/24/2010 for the course ACTSC 445 taught by Professor Christianelemieux during the Fall '09 term at Waterloo.

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sol9 - ACTSC 445: Asset-Liability Management – Fall 2008...

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