Instrumental Variable Strength

Strength

The instrumental variable strength, within cryptocurrency derivatives and options trading, quantifies the correlation between an instrument and its presumed exogenous shock. A robust strength indicates a weaker correlation with the endogeneity, enhancing the validity of inferences drawn from instrumental variable regression. This assessment is crucial for mitigating bias in estimating parameters like volatility surfaces or option sensitivities, particularly when dealing with complex, illiquid markets. Evaluating this strength involves examining the first-stage regression’s F-statistic and assessing the relevance of the instrument.