Simple Summary
Gauntlet recommends the following risk parameter update for the Ethereum v3 USDC comet:
- Increase COMP Liquidation Penalty from 12% to 25%
Analysis
As seen in our risk dashboard, the COMP supply cap of 900k (~$48M) has been fully utilized at 100% for the past two months.
The largest COMP supplier in Ethereum v3 USDC supplies $21.3M, borrows $7M USDC, resulting in a borrow usage of 47%. At present, swapping $250k COMP for USDC on DEXs incurs 6% slippage.
We will demonstrate the absorption scenarios of the large COMP supplier, assuming a ~53% COMP price crash to $10M, making this position liquidatable. These scenarios are outlined under both the current COMP Liquidation Penalty of 12% and the proposed increase to 25%:
| Outcome | Current COMP LP of 12% | Recommended COMP LP of 25% |
|---|---|---|
| COMP Absorbed by Compound | $10M | $10M |
| USDC Owed to Borrower (after liquidation penalty) | $10M × (1 - 12%) = $8.8M | $10M × (1 - 25%) = $7.5M |
| USDC Previously Borrowed | $7M | $7M |
| Additional USDC Paid by Compound | $1.8M | $0.5M |
| Break-even COMP Sale Price for Compound | $8.8M | $7.5M |
| Post-absorption COMP Price Drop to cause insolvency | 5.17% | 11.8% |
With the current 12% COMP Liquidation Penalty, liquidators would need to buy the $10M COMP before its price drops by an additional 5.17%, to prevent protocol insolvency. At present, swapping $250k COMP for USDC on DEXs incurs about 6% slippage. While Mainnet facilitates access to CEX liquidity for liquidators, the limited DEX liquidity compared to the supply cap and the size of this large COMP supplier’s position leads us to recommend increasing the COMP Liquidation Penalty to 25%, which would allow for an 11.8% post-absorption drop buffer. This increase aims to mitigate risk in case this position is absorbed. Additionally, a decrease in COMP supply due to this increased penalty would be beneficial given the liquidity risk.

