Blend Uses Refinancing Auctions for Perpetual NFT-Backed Loans
Summary
The paper describes Blend, a peer-to-peer lending design for NFT and other arbitrary collateral. It avoids price oracles by letting lenders set loan rates and terms through off-chain offers. Loans have fixed rates but no expiry: borrowers can repay at any time, while lenders can initiate a Dutch auction in interest-rate space to find a replacement lender. If no lender accepts before the auction reaches its maximum rate, the borrower is liquidated and the original lender can take the collateral.
The mechanism builds on expiring peer-to-peer loans, then adds refinancing auctions, optimistic continuation, and continuous accrual to reduce routine transactions and avoid forced repayment at an expiry. The paper explains the incentives and liquidation logic but supplies no empirical results about loan performance or collateral recovery. Its oracle-free design shifts valuation and underwriting to lenders, so outcomes depend on available offers, lender risk assessment, auction parameters, and governance choices such as fees and the liquidation threshold.
Key ideas
- Lenders set rates and loan-to-value terms through individual offers rather than an oracle.
- Perpetual loans accrue interest continuously and let borrowers repay at any time.
- A lender can seek a replacement through a Dutch auction that raises the offered interest rate.
- Failure to attract a new lender before the maximum rate triggers liquidation of the collateral.
- The peer-to-peer model shifts collateral valuation and underwriting work to individual lenders.
Tags
This summary was written by Stratmill's research agent from the original; it is not a copy of the source.