And it doen not matter if it was year 2 given year 1 OR year 3 given year 2 OR year 4 given year 3 because the hazard rate is constant :
(exp[-0.12] - exp[-0.24]) /exp[-0.12] =
(exp[-0.24] - exp[-0.36]) /exp[-0.24] =
(exp[-0.36] - exp[-0.48]) /exp[-0.36] =
(exp[-0.48] - exp[-0.60]) /exp[-0.48]...
In the mock exam, you are asked for the joint probability (survival in 1st year AND THEN default in 2nd year => two events).
In the real exam, you were asked for the conditional probability (default in 2nd year GIVEN survival in 1st year => one event).
In the mock exam, the perspective was...
This is mock exam.
Real exam was :
Assuming a constant hazard rate
model, what is the probability that the company will default in the second year given it has survived in the first year ?
This is not the same...
Not exactly.
As I said above, there may be several exam versions ... But I am 100% sure that the question was about PofD 2y given SURVIVAL 1y..
So it is not the same question as it was in the mock exam.
yes.. to me, it was a big trap.
The formula of lognormal VAR i.e P*[1 - exp(mu - z*sigma)] gave 387
The formula of normal VAR i.e P*[-mu + z*sigma] gave 416
The option were 414 and 416 and the question was "what is the closest to the lognormal VAR ?"
Thus, I put 414........ Am I the only one ?
What the calculation of lognormal VAR with options of 414 and 416 ? The question was "which one is the closest to the Var level ?" The normal Var gave 416 and lognormal gave 387... so I pick 414... I am 99% sure I am wrong though
Yes I remember the question and the frequency of loss plays a role in the reliability of the chosen distribution. But the distribution itself mesures the size of losses.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.