Backtesting Model Stability

Definition

Backtesting model stability denotes the capacity of a quantitative trading strategy to maintain consistent performance metrics across varied historical data samples and market regimes. Within cryptocurrency derivatives and options markets, this property ensures that a model remains robust against overfitting, where patterns identified in training data fail to materialize during live deployment. Practitioners evaluate this by observing the variance in expected outcomes when specific parameters or historical time windows undergo systematic perturbation.