Answer-first summary for fast verification
Answer: Incorporating positional information and recomputing the pseudo history of the change in the portfolio whenever the portfolio changes will produce a risk measure that can better capture the portfolio risk dynamic.
## Explanation **Option A is incorrect** because while model validation does examine whether a model is suitable for its intended purpose, the primary purpose of VaR models is to measure and manage market risk, not specifically to enhance capital calculation methods. Capital calculation is one application, but not the fundamental purpose. **Option B is incorrect** because VaR models based on actual P/L history suffer from both accuracy and timeliness issues. When portfolio positions change, historical P/L data becomes less relevant and may not accurately reflect the new risk profile. The statement incorrectly claims they would be "accurate" but not timely. **Option C is correct** because incorporating positional information and recomputing pseudo-history (as in historical simulation approaches) allows the model to better capture dynamic portfolio risk. This approach recalculates what the portfolio's performance would have been under historical market conditions given current positions, providing a more responsive and accurate risk measure that adapts to portfolio changes. This approach is particularly valuable in: - Capturing nonlinear relationships and option-like payoffs - Adapting to changing portfolio compositions - Providing more timely risk assessments when positions change - Better reflecting the actual risk dynamics of the current portfolio configuration
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Model validation requires a review of conceptual soundness of the model, which requires the validator to carefully examine the assumptions, techniques and data used by the model. Which of the following statements is correct regarding the important considerations in assessing the VaR model's conceptual soundness?
A
The core of model validation is to examine whether the model is suitable for the purpose it is developed for, and for VaR models the basic purpose is to enhance capital calculation methods.
B
The VaR model calculated based on actual Profit/Loss history would accurately, but not timely, reflect the change in portfolio risk once the positions are changed.
C
Incorporating positional information and recomputing the pseudo history of the change in the portfolio whenever the portfolio changes will produce a risk measure that can better capture the portfolio risk dynamic.