Collateral Debt Position (CDP)
A collateral debt position (CDP) is a smart contract that locks crypto collateral to mint or borrow stablecoins against it.
Key Takeaways
- A collateral debt position (CDP) is a smart contract that lets you lock cryptocurrency as collateral and mint new stablecoins against it, providing liquidity without selling your assets.
- CDPs require overcollateralization: the value of locked collateral must exceed the value of minted stablecoins, typically by 110% to 150%, to absorb price volatility.
- Unlike lending protocols that let you borrow from depositor pools, CDPs create entirely new tokens. This distinction makes CDPs the foundational primitive behind decentralized stablecoins like DAI and LUSD.
What Is a Collateral Debt Position?
A collateral debt position (CDP) is a smart contract mechanism that allows users to deposit cryptocurrency as collateral and mint stablecoins against it. The concept was pioneered by MakerDAO (now rebranded to Sky Protocol) in 2017, establishing CDPs as one of the foundational primitives of decentralized finance (DeFi).
The core idea is simple: instead of selling your ETH or other crypto assets to get dollars, you lock them in a smart contract and mint dollar-pegged stablecoins. You keep exposure to your collateral's price appreciation while gaining liquid stablecoins to spend, trade, or deploy elsewhere in DeFi. When you want your collateral back, you repay the minted stablecoins plus any accrued fees, and the contract releases your assets.
CDPs are sometimes called "vaults" (MakerDAO's current terminology) or "troves" (Liquity's term), but the underlying mechanism is the same: collateral in, stablecoins out, with liquidation as the enforcement mechanism that keeps the system solvent.
How It Works
Opening and managing a CDP follows a straightforward lifecycle, though the parameters vary across protocols.
- Deposit collateral: the user sends cryptocurrency (ETH, WBTC, or other accepted tokens) to the CDP smart contract, which locks it
- Mint stablecoins: the protocol mints new stablecoins up to the maximum allowed by the collateral ratio. With a 150% minimum ratio and $1,500 of ETH deposited, you can mint up to $1,000 in stablecoins
- Manage the position: the user monitors their collateral ratio as asset prices fluctuate. If the ratio drops toward the liquidation threshold, they can add more collateral or repay some debt
- Repay and withdraw: to close the position, the user repays the full minted amount plus any accrued stability fees, and the contract releases the locked collateral
The stablecoins minted through a CDP are newly created tokens. They did not exist before the user opened the position. This is fundamentally different from borrowing existing tokens from a pool, and it is what makes CDPs a monetary primitive rather than a lending product.
Key Parameters
Every CDP protocol defines a set of risk parameters that govern how positions behave. These parameters are typically set by governance token holders or fixed at deployment.
| Parameter | Description | Example |
|---|---|---|
| Collateral ratio | Minimum ratio of collateral value to debt value required to keep a position open | 150% (MakerDAO), 110% (Liquity) |
| Liquidation threshold | The collateral ratio at which the position becomes eligible for liquidation | Equals the minimum ratio in most protocols |
| Stability fee | An interest rate charged on outstanding debt, paid when the position is closed | Variable per vault type in MakerDAO; one-time 0.5% fee in Liquity V1 |
| Liquidation penalty | An additional fee charged during liquidation, incentivizing users to maintain healthy ratios | 13% in MakerDAO ETH vaults |
| Debt ceiling | Maximum amount of stablecoins that can be minted against a given collateral type | Set per collateral type via governance |
CDPs vs. Lending Protocols
CDPs and lending protocols like Aave and Compound both let users deposit collateral and receive tokens. The distinction matters because it shapes how each system generates yield, manages risk, and affects token supply.
| Feature | CDP Protocols | Lending Protocols |
|---|---|---|
| Token source | Mints new stablecoins | Borrows from depositor pools |
| Interest model | Stability fee set by governance or fixed | Variable rates driven by utilization |
| Borrowable assets | Only the protocol's native stablecoin | Any asset in the lending pool |
| Supply impact | Increases total stablecoin supply | Redistributes existing supply |
| Examples | MakerDAO, Liquity, crvUSD | Aave, Compound, Spark Lend |
Major CDP Systems
MakerDAO (Sky Protocol)
MakerDAO launched the first CDP system in 2017 with single-collateral DAI backed only by ETH. It upgraded to multi-collateral DAI in November 2019, accepting a range of assets including WBTC, stETH, and real-world assets. In September 2024, MakerDAO rebranded to Sky Protocol, introducing USDS as DAI's successor (convertible 1:1) and SKY as the new governance token.
MakerDAO vaults typically require a minimum 150% collateral ratio for volatile assets, charge variable stability fees set through governance votes, and impose a 13% liquidation penalty. Liquidations use a Dutch auction mechanism where the collateral price starts high and decreases until a buyer steps in to cover the debt.
Liquity (LUSD and BOLD)
Liquity V1 took a radically different approach to CDPs. Its smart contracts are fully immutable with no admin keys and no governance: every parameter was fixed at deployment and cannot be changed. It requires only a 110% minimum collateral ratio, the lowest among major CDP protocols, enabled by its Stability Pool liquidation mechanism that settles instantly rather than through auctions.
Liquity V1 charges a one-time borrowing fee (typically 0.5%) instead of ongoing interest, and accepts only ETH as collateral. Liquity V2 launched on Ethereum mainnet in May 2025 with a new stablecoin called BOLD, adding multi-collateral support (WETH and liquid staking tokens), user-set interest rates, and a yield-bearing mechanism for BOLD holders.
crvUSD (Curve Finance)
Curve Finance launched crvUSD in May 2023 with a novel liquidation mechanism called LLAMMA (Lending-Liquidating AMM Algorithm). Instead of a discrete liquidation at a single price threshold, LLAMMA performs continuous "soft liquidations" across a price range.
As collateral value declines, LLAMMA gradually converts collateral into crvUSD across predefined price bands. If the collateral price recovers, the process reverses, converting crvUSD back into collateral. This approach distributes selling pressure over time and reduces the systemic risk of cascading liquidations. Curve's testing showed that a 10% price decline over three days resulted in only about 1% collateral loss, far less than a traditional full liquidation.
Liquidation Mechanics
Liquidation is the enforcement mechanism that keeps CDP systems solvent. When a position's collateral ratio falls below the protocol's minimum threshold, the position becomes eligible for liquidation, and external actors (called keepers or liquidators) can trigger the process.
Why Liquidation Matters for Peg Stability
Every stablecoin in circulation is backed by collateral locked in a CDP. If collateral values drop and positions become undercollateralized without being liquidated, the total collateral backing the stablecoin supply would fall below 1:1, threatening the peg. Liquidation ensures that underwater positions are closed before they can create unbacked stablecoins.
Different protocols handle liquidation differently:
- MakerDAO uses Dutch auctions where collateral is offered at a declining price until a bidder covers the debt plus the liquidation penalty
- Liquity V1 uses a Stability Pool where LUSD depositors absorb liquidated debt in exchange for discounted collateral, enabling instant settlement
- crvUSD uses LLAMMA for continuous soft liquidation across price bands, avoiding the sudden sell pressure of traditional mechanisms
In all cases, liquidation cascades remain a systemic risk. If collateral prices drop sharply, mass liquidations can flood the market with collateral, driving prices lower and triggering more liquidations in a feedback loop.
Use Cases
Leveraged Exposure
Traders use CDPs to gain leveraged exposure to their collateral asset. By depositing ETH, minting DAI, buying more ETH with that DAI, and depositing the new ETH into another CDP, they create a leveraged long position. This recursive borrowing strategy amplifies both gains and losses.
Liquidity Without Selling
Long-term holders who believe in an asset's appreciation can access liquidity without triggering a taxable sale event. A CDP lets them mint stablecoins for expenses, yield farming, or other investments while maintaining their original position.
Decentralized Stablecoin Issuance
CDPs are the mechanism through which decentralized stablecoins enter circulation. Unlike fiat-backed stablecoins such as USDC or USDT, which require a centralized issuer holding bank reserves, CDP-minted stablecoins are created permissionlessly by anyone with collateral. This makes them censorship-resistant and available to users globally without requiring identity verification or bank accounts. For a deeper comparison, see the research on stablecoin peg mechanisms.
Capital Efficiency in DeFi
CDPs unlock the capital efficiency of idle crypto assets. Instead of collateral sitting unused in a wallet, it can back stablecoins that participate in yield farming, liquidity pools, or cross-border payments. This composability with other DeFi protocols is a key reason CDPs have driven billions of dollars in total value locked.
Risks and Considerations
Liquidation Risk
The primary risk of opening a CDP is liquidation. If the collateral asset's price drops faster than you can add collateral or repay debt, the protocol will liquidate your position. You lose your collateral (minus whatever remains after covering the debt and penalty), and the loss is permanent. During the March 2020 market crash ("Black Thursday"), MakerDAO liquidated over $8 million in ETH vaults, with some users losing their entire collateral due to auction failures.
Smart Contract Risk
CDPs are only as secure as the smart contracts that implement them. A bug in the contract logic could allow theft of collateral, incorrect liquidations, or unbacked minting. While major CDP protocols have undergone extensive audits, no audit eliminates all risk.
Oracle Dependence
CDP protocols rely on price oracles to determine collateral values and trigger liquidations. If an oracle delivers an incorrect price (due to manipulation, oracle attacks, or network delays), positions may be liquidated incorrectly or remain open when they should be closed.
Governance Risk
In protocols with active governance (like MakerDAO/Sky), parameter changes can affect existing positions. A governance vote to raise the stability fee or lower the debt ceiling can make previously healthy positions more expensive or restrict the ability to mint new stablecoins. Immutable protocols like Liquity V1 eliminate this risk but sacrifice the ability to adapt to changing market conditions.
Peg Instability
CDP-backed stablecoins can trade below their peg during periods of high selling pressure or above their peg when demand outstrips supply. While mechanisms like the Peg Stability Module in MakerDAO help maintain the peg, they introduce their own tradeoffs, including reliance on centralized stablecoins as backstop reserves.
Why It Matters
Collateral debt positions are the engine behind decentralized stablecoin issuance. Every DAI, LUSD, BOLD, and crvUSD in circulation was created through a CDP. As stablecoins grow into a multi-hundred-billion-dollar asset class, CDPs remain the primary mechanism for issuing stablecoins without reliance on traditional banking infrastructure.
For the broader crypto ecosystem, CDPs represent a fundamental building block: the ability to create stable, dollar-denominated value from volatile collateral, entirely on-chain and without intermediaries. This composability powers everything from DeFi yield strategies to stablecoin adoption in emerging markets, where users need dollar-denominated savings without access to traditional banks. Platforms like Spark are building payment infrastructure that makes these stablecoins usable for everyday transactions, bridging the gap between DeFi primitives and real-world utility.
This glossary entry is for informational purposes only and does not constitute financial or investment advice. Always do your own research before using any protocol or technology.