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Value at Risk example NEOMA Corrected
Matière: Quantitative Methods
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Université: NEOMA Business School
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Value at Risk analysis
The daily return of the asset price X follows a normal distribution with mean -0.002 and
standard deviation 0.05. What is the probability that the daily return falls below -0.10?
𝑝(𝑟𝑒𝑡𝑢𝑟𝑛<−0.10)=𝑝(𝑧<(−0.10+0.002)
0.05 )=𝑝(𝑧<−1.96)=2.5%
What is the probability that the daily return overshoot above 0.08?
𝑝(𝑟𝑒𝑡𝑢𝑟𝑛>0.08)=𝑝(𝑧>(0.08+0.002)
0.05 )=𝑝(𝑧>1.64)=5%
The daily return of the asset price Y follows a normal distribution with mean 0.001.
Considering that, the probability that a daily return falls below -0.127 is 10% what is the
standard deviation of the distribution?
𝑝(𝑟𝑒𝑡𝑢𝑟𝑛<−0.127)=10%=𝑝(𝑧<(−0.127−0.001)
𝜎)=10% → −1.28=(−0.127−0.001)
𝜎→𝜎 =
(−0.128)
−1.28 =0.10
Which asset is more risky X or Y. Please explain!
The asset Y is twice more risky than asset X given that the standard deviation is double!