CFA Practice Question

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CFA Practice Question

One of the limitations of historical simulation is that ______

A. bootstrapping is a big problem.
B. it can only reflect risks that are present in the sample.
C. it is a repetitive method.
D. it is only an alternative method.
Correct Answer: B

Historical simulation can only reflect risks that are present in the sample. It does not allow the introduction of any risk not present in the sample, which is a limitation.

User Contributed Comments 4

User Comment
danlan The limitation comes from the fact that it's based on historic simulation.
NikolaZ what is bootstrapping?
johntan1979 In statistics, bootstrapping is a method for assigning measures of accuracy to sample estimates. This technique allows estimation of the sampling distribution of almost any statistic using only very simple methods. Generally, it falls in the broader class of resampling methods.

A great advantage of bootstrap is its simplicity. It is straightforward way to derive estimates of standard errors and confidence intervals for complex estimators of complex parameters of the distribution, such as percentile points, proportions, odds ratio, and correlation coefficients.

Although bootstrapping is (under some conditions) asymptotically consistent, it does not provide general finite-sample guarantees. Furthermore, it has a tendency to be overly optimistic.
sshetty2 Johntans breakdown should be part of the summary for this LOS xD
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