Confidence Interval Calibration
Confidence interval calibration is the process of setting the appropriate statistical boundaries for risk models to ensure they accurately reflect the probability of market outcomes. In risk management, selecting a confidence level, such as 95 or 99 percent, dictates how much weight is given to rare events in the model.
If the calibration is too low, the model may underestimate the risk of significant losses; if it is too high, it may lead to overly conservative capital allocation that hampers profitability. Calibration involves testing the model against historical data to see if the frequency of actual losses matches the predicted frequency.
Proper calibration is essential for ensuring that risk measures like value at risk are reliable and actionable. It requires a deep understanding of the underlying asset's volatility profile and the statistical distribution of returns.