Liquidation Bonus vs Penalty in DeFi: Who Pays?

Liquidation bonus and liquidation penalty title two reverse methods DeFi protocols pay for the work of liquidating dangerous loans. In a bonus mannequin, the liquidator receives further collateral as a reward for repaying debt. In a penalty mannequin, the borrower is charged a further price when their place is liquidated, and the protocol retains that price.Who pays whom is dependent upon the mechanism. In money-market swimming pools reminiscent of Compound and Aave, liquidators get a protocol-set bonus or low cost, which comes from seizing extra collateral than the repaid debt is price. The borrower successfully pays the liquidator by means of further collateral. In MakerDAO’s vault system, a liquidation penalty is added to the vault’s debt, and auctions search to get better debt plus penalty. The borrower pays the protocol the penalty, whereas public sale members nonetheless purpose to purchase collateral at a reduction to market.This break up issues for incentives, keeper participation, and protocol solvency. Larger bonuses can pace liquidations however leak extra worth from debtors, whereas bigger penalties can strengthen protocol buffers however should nonetheless appeal to public sale consumers. Governance units these parameters, so every mannequin encodes a special stability of danger and reward.How liquidation bonuses and penalties work on-chainIn a money-market mannequin, a liquidation turns into eligible as soon as a borrower’s place breaches danger thresholds. Compound exposes a liquidationIncentive, for instance 1.08 for an 8 % bonus, that lets liquidators seize collateral price greater than the debt they repay. The contracts compute the seized tokens utilizing present oracle costs and trade charges, multiplying the precise compensation by the liquidationIncentive to dimension the liquidator’s take. The logic is seen within the Comptroller and CToken code, which calculates seizeTokens proportional to actualRepayAmount × liquidationIncentive × priceBorrowed ÷ (priceCollateral × exchangeRate) (Compound docs, Comptroller.sol).Aave applies the identical concept with completely different terminology. It defines a Well being Issue that gates liquidation and a liquidationBonus parameter that specifies the low cost or bonus transferred to liquidators once they buy collateral. Aave governance supplies additionally talk about guidelines just like a detailed issue and, in V4 designs, a variable bonus schedule that will increase as HF worsens to sharpen incentives (Aave governance be aware).MakerDAO frames liquidations otherwise. When a vault is liquidated, a Liquidation Penalty is added to its debt. The system then runs an public sale to promote collateral with the intention to cowl the debt plus the penalty. The penalty is income to the protocol slightly than a direct bonus paid to liquidators within the money-market sense (Maker Protocol whitepaper). Maker’s Liquidations 2.0 launched Dutch auctions and operational particulars that audits spotlight as complicated and parameter delicate (ChainSecurity audit).Cash-market mannequin: borrower-funded bonus to liquidatorsIn Compound and Aave fashion swimming pools, a 3rd social gathering repays half or all of an underwater mortgage and receives collateral at a protocol-set low cost. The low cost is encoded as a multiplier in Compound’s liquidationIncentive and Aave’s liquidationBonus. As a result of the liquidator seizes collateral price greater than the quantity of debt repaid, the borrower’s place loses further collateral past a 1:1 swap. That differential is the liquidator’s revenue alternative, topic to oracle costs and execution prices. The protocol itself doesn't levy a separate liquidation price on the borrower on this mannequin, past the implicit switch of worth through further collateral to the liquidator (Compound docs, Comptroller.sol).These programs depend on liquidators and MEV searchers to compete to execute liquidations as quickly as they're worthwhile. The scale of the bonus impacts how shortly and reliably liquidations clear. A bigger bonus widens the margin for slippage and gasoline prices, making it extra probably that off-chain bots step in promptly. The trade-off is extra worth leaves the borrower’s collateral and, if set too excessive, it might probably encourage pointless liquidations across the threshold window, a priority governance debates in tuning the parameter.Vault/public sale mannequin: borrower penalty paid to the protocolMakerDAO provides a Liquidation Penalty to a vault’s debt when it falls under required collateralization. The protocol then conducts an public sale to promote sufficient collateral to repay the debt plus the penalty. The penalty is collected by the system, not the liquidator. Liquidators, known as keepers, nonetheless search revenue by shopping for collateral through the public sale at a value under prevailing markets, however their acquire will not be a protocol-paid bonus within the money-market sense. The penalty improves the protocol’s loss-absorbing capability and might offset public sale prices, however it have to be calibrated in order that auctions nonetheless clear effectively (Maker whitepaper, ChainSecurity audit).Operationally, this strategy concentrates worth switch to the protocol slightly than to the primary liquidator. It additionally introduces public sale design selections, reminiscent of Dutch public sale parameters and keeper incentives, that decide how shut the realized sale value tracks honest worth. Poorly tuned auctions or skinny market liquidity can extend gross sales and enhance the danger that collateral fetches lower than debt plus penalty, creating dangerous debt the system should soak up.Governance dials and incentivesLiquidation parameters are on-chain, governance-controlled settings. In Compound, an admin operate reminiscent of _setLiquidationIncentive adjustments the bonus issue that determines seized collateral (Comptroller.sol). In Aave, reserve configuration contains the liquidationBonus and the thresholds that feed the Well being Issue, and governance supplies discover the influence of variable bonuses tied to HF in V4 mechanics (Aave governance be aware).Altering these numbers adjustments habits. Larger bonuses normally enhance keeper participation and cut back the possibility of lingering unhealthy loans, however additionally they enhance worth leakage from debtors. Larger penalties enhance funds retained by the protocol upon liquidation, but if penalties or public sale parameters are mis-set, auctions might underperform or deter bidders. DAOs sometimes talk about, simulate, and section these adjustments as a result of they affect MEV competitors, protocol bad-debt publicity, and consumer expertise.Walkthrough: one place, two liquidation pathsThe following illustrative sequence reveals how “who pays whom” differs when the identical underwater place is processed by a bonus mannequin versus a penalty mannequin. Quantities are examples for instinct, not market information.
Place to begin: a borrower’s place breaches danger limits and is eligible for liquidation.
Cash-market path (Compound/Aave fashion): a liquidator repays 100 items of the borrower’s debt. With a liquidation incentive of 1.08, the system lets the liquidator seize collateral price 108 items at oracle costs. The additional 8 items of collateral is the liquidator’s gross incentive. The borrower successfully pays this incentive by means of further collateral misplaced. The protocol receives the 100 items of repaid debt and no separate liquidation price (Compound docs).
Vault-auction path (Maker fashion): the protocol provides a liquidation penalty to the borrower’s debt, then auctions collateral to get better debt plus penalty. Suppose the public sale sells precisely sufficient collateral to cowl 100 items of debt plus the penalty. The penalty accrues to the protocol. Bidders purpose to purchase collateral at a reduction relative to market through the public sale, which is their supply of revenue, separate from the penalty (Maker whitepaper).



Coverage
Who pays
Recipient
Parameter title




Cash-market bonus
Borrower through further collateral seized
Liquidator
Compound liquidationIncentive, Aave liquidationBonus


Vault penalty
Borrower through added debt
Protocol
Maker Liquidation Penalty


Limitations, dangers, edge circumstances, and misconceptionsKey limitations and dangers embody:
Parameter misconfiguration. Audits of Maker’s Liquidations 2.0 warn that penalties, public sale timing, and keeper incentives have to be calibrated. Incorrect settings can drain worth or depart auctions operating too lengthy, risking uncovered debt (ChainSecurity audit).
Execution and liquidity danger. In bonus fashions, liquidators nonetheless rely on DEX and oracle liquidity to unwind seized collateral. In pressured markets, slippage can erase the bonus and sluggish liquidations.
Value gaps and dangerous debt. Fast strikes can push positions far underwater earlier than bots react. Even with sturdy bonuses or penalties, protocols can find yourself with shortfalls if collateral can't be offered close to oracle worth shortly.
Keeper competitors and MEV. If bonuses are too small, solely privileged searchers can revenue after gasoline and slippage. If too giant, worth leakage from debtors rises, and opportunistic liquidations might cluster round thresholds.
Widespread misconceptions:
“Bonuses are free cash.” They aren't. In bonus fashions the borrower pays the bonus by means of further collateral seized, set by the protocol parameter (Compound docs).
“Maker’s penalty rewards liquidators.” The penalty accrues to the protocol. Liquidator revenue in Maker-type programs comes from shopping for collateral at public sale under market, not a protocol-paid bonus (Maker whitepaper).
“Altering parameters has little influence.” Governance dials materially shift habits and danger and are normally mentioned with simulations because of their system-wide results (Aave governance be aware, Comptroller.sol).
When you'll encounter or use these mechanicsBorrowers face these guidelines at any time when they take collateralized loans. In Compound and Aave fashion swimming pools, the posted liquidation bonus tells you the way a lot further collateral a liquidator can seize in case your Well being Issue or collateral ratio falls under the edge. In Maker-style vaults, the liquidation penalty tells you the way a lot further debt is added in case your vault is liquidated. Each settings are seen in protocol docs and governance posts and should change by means of DAO selections (Compound docs, Aave governance be aware, Maker whitepaper).Liquidators and searchers tune bots to the bonus or public sale design, together with anticipated slippage and gasoline prices. DAO contributors weigh parameter adjustments to stability well timed liquidations with borrower prices and protocol security. Understanding who pays whom clarifies that stability: bonus fashions route worth to liquidators from debtors, whereas penalty fashions route worth to the protocol from debtors, with auctions nonetheless needing to draw aggressive bids.Often Requested QuestionsDoes an 8 % liquidation bonus imply the protocol pays liquidators 8 %?No. In bonus fashions like Compound and Aave, the liquidator seizes collateral price greater than the repaid debt. The borrower successfully pays the 8 % by means of further collateral misplaced, as outlined by the liquidationIncentive or liquidationBonus (Compound docs).In MakerDAO, who receives the liquidation penalty?The protocol. Maker provides the penalty to the vault’s debt and auctions collateral to get better debt plus penalty. The penalty will not be a payout to liquidators (Maker whitepaper).If Maker doesn't pay a bonus, how do liquidators revenue there?They purpose to purchase collateral at public sale costs under market, then promote it at or close to market. Public sale mechanics, not a protocol-set bonus, create the chance (ChainSecurity audit).Who adjustments liquidation bonuses or penalties, and the way?DAOs set these parameters on-chain. Compound exposes an admin operate to vary the liquidation incentive, and Aave configures reserve parameters such because the liquidation bonus. Governance proposals and simulations sometimes precede adjustments as a result of incentives and danger shift system-wide (Comptroller.sol, Aave governance be aware).What occurs if liquidations fail throughout excessive volatility?Protocols can incur dangerous debt if collateral can't be offered quick sufficient or at honest worth. Bonus sizes, penalties, and public sale designs attempt to mitigate this, however sudden value gaps and skinny liquidity stay danger components (Aave governance be aware, ChainSecurity audit).

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