Liquidation Penalty Rates
Liquidation penalty rates are fees charged to borrowers when their positions are forcibly closed due to falling below the required collateral threshold. These penalties serve two primary purposes: they compensate the liquidators for the risk and cost of taking on the under-collateralized position, and they act as a deterrent to prevent users from allowing their accounts to become insolvent.
The rate must be set carefully; if it is too low, liquidators may not be incentivized to act, leaving the protocol with bad debt. If it is too high, it unfairly punishes users for minor volatility, which can lead to increased risk aversion and lower capital efficiency.
Finding the optimal penalty rate is a key component of the economic design of any lending protocol, balancing the need for protocol security with the goal of user fairness.