Unit Root Testing Methods

Methodology

Unit root testing serves as a foundational quantitative diagnostic to determine whether a cryptocurrency price series or an option volatility index is stationary. Analysts utilize tests like the Augmented Dickey-Fuller or Phillips-Perron to discern if mean reversion characterizes the asset or if the price level exhibits a stochastic trend. Establishing this property remains critical for derivatives traders, as non-stationary data requires first-differencing to avoid spurious regressions that miscalculate risk parameters.