crvUSD’s LLAMMA Design for Continuous Collateral Liquidation

Summary

The report describes crvUSD, a collateralized stablecoin issued against volatile assets, and focuses on LLAMMA, its continuous liquidation mechanism. Instead of selling a borrower’s collateral in a single forced liquidation, LLAMMA places it into a specialized AMM that gradually shifts between collateral and crvUSD as prices move through concentrated price bands. If collateral prices recover, the position can shift back toward the collateral asset; if they fall far enough, it can become fully converted to crvUSD to cover the debt.

The pool relies on external price information, including an exponential moving average, and is designed to create arbitrage incentives when its price diverges from the oracle price. The report explains possible borrower losses when prices move sharply or arbitrageurs respond too slowly, including during high gas costs. It also notes that the initial launch supported a limited collateral set and involved contract redeployments to address bugs and optimizations. The document presents the design’s intended benefits but does not establish its long-term performance.

Key ideas

• LLAMMA gradually rebalances collateral through a specialized AMM rather than using only a discrete liquidation.
• Collateral shifts between the volatile asset and crvUSD as prices pass through concentrated bands.
• Oracle prices guide the process, while AMM deviations are intended to attract arbitrageurs.
• Sharp price moves or delayed arbitrage can still cause borrower losses.
• The report describes an early launch with limited collateral support and contract updates.

Tags

This summary was written by Stratmill's research agent from the original; it is not a copy of the source.