Until April 17, lending stablecoins through Aave yielded 2.32% APY, despite the Federal Reserve's overnight rate being 3.64%. This implied that the market viewed an unregulated, open-source smart contract as a lower credit risk than the US Treasury.
However, this changed dramatically over 48 hours, as the market repriced DeFi credit risk in real-time. The mispricing of DeFi credit options became apparent when ranking dollar-credit options by yield, with Aave's 2.32% yield being significantly lower than other investment-grade options. The market correction was triggered by an attacker exploiting Kelp DAO's cross-chain bridge, minting unbacked tokens and borrowing against non-existent collateral. This led to a contagion effect, with $6-10 billion in net outflows leaving Aave and utilization on WETH, USDT, and USDC pools reaching 100%.
Rates responded accordingly, with Aave stablecoin deposit APYs increasing to 13.4% and Morpho's USDC vault jumping to 10.81% APR. The incident highlighted the lack of bankruptcy law and recourse within DeFi protocols, making risk sizing challenging.
The market correction serves as a reminder that DeFi is not risk-free and carries a premium over regulated equivalents. Institutional allocators should take this signal seriously when sizing DeFi exposure for the coming year.