crvUSD explained: the Curve Finance stablecoin and LLAMMA

crvUSD is a decentralised, over-collateralised stablecoin issued directly by Curve Finance. You deposit collateral, you mint crvUSD against it, and you pay a borrow rate until you repay. Structurally that is familiar territory. What is not familiar is what happens when your collateral falls in value, and that is where Curve Finance did something genuinely new.

The problem with normal liquidations

In a conventional lending market your position is either healthy or liquidated. Cross the threshold and a keeper sells your collateral in one transaction, usually at a discount, usually into the worst liquidity of the day, and usually with a penalty on top. The outcome is binary and brutal, and it clusters: everyone gets liquidated at the same price, which makes the price fall further.

LLAMMA: liquidation as a curve, not a cliff

Curve Finance replaced that with LLAMMA — a Lending-Liquidating AMM Algorithm. Your collateral is not held as a static balance; it is placed as liquidity in a specialised Curve Finance AMM across a band of prices. As the market price falls through your band, the AMM sells collateral for crvUSD incrementally. As it rises back, the AMM buys collateral back. This is called soft liquidation, and it means a temporary dip converts a slice of your position rather than destroying all of it.

The trade-off is real and should not be glossed over. Every round trip through your band has a cost, because you sell on the way down and buy on the way up. A volatile, range-bound market can grind a crvUSD borrower's collateral down through repeated soft liquidation even if the price ends where it started. LLAMMA converts one catastrophic loss into many small ones — better in most scenarios, not free in any of them.

Bands and how you choose risk

When you open a crvUSD loan you choose how many bands to spread across. Fewer bands means a tighter, more capital-efficient range that starts soft liquidating later but converts faster. More bands means a gentler, wider process. This is the main risk dial a Curve Finance borrower controls, and it is more expressive than a single loan-to-value number.

If price falls far enough and stays there, hard liquidation still exists as a backstop. Soft liquidation reduces the probability and violence of that outcome; it does not remove it.

Peg keepers and the crvUSD borrow rate

Two mechanisms keep crvUSD near a dollar. Peg keeper contracts hold asymmetric positions in dedicated Curve Finance stable pools: when crvUSD trades above peg they mint and deposit, increasing supply; when it trades below they withdraw and burn, reducing it. Alongside that, the borrow rate moves — expensive borrowing discourages new minting when crvUSD is weak, cheap borrowing encourages it when crvUSD is strong. Supply responds to price without anyone voting on it.

Why crvUSD matters for the Curve Finance ecosystem

crvUSD gives Curve Finance a revenue line that does not depend on trading volume: borrow interest accrues continuously and flows to veCRV holders. It also gives Curve Finance a native asset to pair against every other stablecoin in its pools, deepening the protocol's core liquidity rather than renting it. And it closes the loop with the CRV token, since the same vote-escrow system that directs gauge emissions also governs crvUSD markets and their parameters.

Should you borrow crvUSD?

crvUSD suits a borrower who wants leverage on collateral they intend to hold through volatility and who understands that soft liquidation is a cost, not a shield. It suits a lender or liquidity provider who wants exposure to Curve Finance protocol revenue. It does not suit anyone who plans to open a maximum-size loan and stop watching it — LLAMMA is gentler than a hard liquidation engine, but it still charges you for being wrong.