Position Decay

Definition

Position decay refers to the incremental erosion of a portfolio’s risk-adjusted performance or directional edge over a specific temporal horizon within crypto derivatives markets. It manifests primarily through the relentless impact of theta in options contracts or the funding rate cost in perpetual swaps that systematically bleeds collateral from leveraged exposure. Sophisticated traders must account for this phenomenon as a silent performance headwind that diminishes long-term capital efficiency during periods of range-bound price action.