Long-Range Dependence

Definition

Long-range dependence characterizes a stochastic process where current observations retain statistical correlation with values across significant temporal horizons. Unlike short-memory processes that decay exponentially, these phenomena exhibit power-law decay in autocorrelation functions, implying that past market shocks exert a persistent influence on future volatility. In the context of cryptocurrency derivatives, this property suggests that price impacts are not immediately neutralized, fundamentally challenging the assumptions of efficient market hypotheses used in standard option pricing models.