Until April 17, lending stablecoins on Aave yielded 2.32% APY, despite the Federal Reserve's overnight rate being 3.64%. This discrepancy implied that the market viewed an unregulated, open-source smart contract as a lower credit risk than the US Treasury. However, this mispricing was corrected within 48 hours.
The hierarchy of dollar-credit options by yield prior to the correction made no sense, with Aave's rate being significantly lower than other investment-grade options. Luca Prosperi argued that DeFi stablecoin rates should carry a 250-400 basis-point premium over the risk-free rate, while the Bank of Canada cited Aave's 0.00% non-performing loan rate as proof of DeFi's ability to deliver defaultless lending.
The market's repricing of DeFi credit risk was triggered by an attacker exploiting Kelp DAO's cross-chain bridge, resulting in a shortfall of approximately $292 million. This incident highlighted the contagion risk in DeFi protocols, which are interoperable by design, and the lack of bankruptcy laws and recourse within these systems. As a result, rates responded accordingly, with Aave stablecoin deposit APYs increasing from 3-6% to 13.4% within two days.
The total DeFi TVL across the top 20 chains fell by more than $13 billion, and institutional allocators should take this signal seriously when sizing DeFi exposure for the coming year.