Answer :
1. Wrong model.
2. Model implementation.
3. Model usage.
4. Uncertainty on volatility.
5. Time inconsistency.
6. Correlation uncertainty.
7. Complexity.
8. Illiquidity and model risk.
2. Model implementation.
3. Model usage.
4. Uncertainty on volatility.
5. Time inconsistency.
6. Correlation uncertainty.
7. Complexity.
8. Illiquidity and model risk.