Probabilistic Risk Forecasting
Meaning ⎊ The use of statistical models to predict the likelihood of various risk outcomes, providing a distribution of possibilities.
F-Statistic Distribution
Meaning ⎊ A probability distribution used in statistical tests to compare the variances or goodness-of-fit of two models.
Parameter Stability
Meaning ⎊ The consistency of model coefficients over time, indicating that the relationship between variables remains unchanged.
T-Statistic
Meaning ⎊ A ratio used in hypothesis testing to determine if a result is statistically significant relative to data variation.
Log Returns Transformation
Meaning ⎊ Converting price data to log returns to achieve better statistical properties like additivity and normality.
Chow Test
Meaning ⎊ A statistical test to determine if the coefficients of a regression model are different across two distinct time periods.
Backtesting Obsolescence
Meaning ⎊ The failure of historical data to accurately forecast future performance due to structural changes in market conditions.
Variance-Covariance Approach
Meaning ⎊ A parametric risk calculation method assuming normal return distributions and stable correlations between portfolio assets.
Residual Analysis
Meaning ⎊ Examination of differences between observed and predicted values to validate model accuracy and assumptions.
Central Limit Theorem
Meaning ⎊ A statistical principle explaining why the sum of many random variables tends toward a normal distribution.
Multicollinearity Mitigation
Meaning ⎊ Techniques to address high correlation between input variables to improve model stability and coefficient reliability.
L2 Ridge Penalty
Meaning ⎊ A regularization technique that penalizes squared coefficient size to keep them small, enhancing stability in noisy data.
Standard Error
Meaning ⎊ A statistical measure indicating the precision and uncertainty of a calculated estimate or sample mean.
