Collateral Reuse
Collateral Reuse, also known as rehypothecation in traditional finance, is the practice of using the same collateral across multiple lending or derivative protocols to maximize capital efficiency. While this increases the yield for the user, it significantly elevates systemic risk.
If the collateral is locked in multiple places, a default in one position can lead to a chain reaction where the asset is suddenly withdrawn or liquidated across all venues. This creates a hidden layer of leverage that is difficult for risk managers to quantify.
In a crisis, the rush to reclaim collateral can lead to a liquidity crunch, as there is not enough actual asset to cover all the claims. Protocols must implement strict transparency measures to track collateral usage and prevent excessive rehypothecation that could threaten protocol solvency.