A significant loss in the crypto space was recorded on Thursday when a user mismanaged a transaction that resulted in a staggering loss of approximately $50 million. The incident unfolded when the user attempted to execute a token swap involving $50,432,688 worth of aEthUSDT, an interest-bearing token linked to Tether’s USDT stablecoin deposited in the Aave decentralized lending protocol, in exchange for aEthAAVE, a variant of Aave governance tokens. This trading activity was carried out through the CoW Protocol.
Due to extremely low liquidity in the associated trading pools, the transaction experienced over 99% slippage, leaving the user with only 327 aEthAAVE tokens, valued at roughly $36,000 post-trade. The vast difference in value was quickly seized by arbitrage traders and network intermediaries, highlighting the risks associated with executing large orders in decentralized finance (DeFi).
Stani Kulechov, the founder of the Aave protocol, commented on the situation, indicating that multiple warnings had been presented to the user prior to the transaction’s confirmation. Kulechov explained that the Aave interface cautioned the user about the potential for extraordinary slippage due to the size of the order, necessitating confirmation via a checkbox to proceed.
According to Kulechov, the user acknowledged these warnings on their mobile device and accepted the risks associated with such a large transaction. He noted, “The transaction could not be moved forward without the user explicitly accepting the risk,” and emphasized that the CoW Swap routers functioned as designed, adhering to standard industry practices.
Despite the technical correctness of the transaction’s execution, Kulechov admitted that the outcome was far from optimal. In a gesture to assist the affected user, Aave plans to reach out and return approximately $600,000 in fees that were collected from the transaction.
This incident follows a recent pattern in the DeFi space where substantial losses due to slippage have become increasingly common, particularly when large orders are placed against shallow liquidity pools. Just days prior to this considerable loss, around $27 million was liquidated on Aave, an event some market participants attributed to a temporary pricing issue with the token wstETH.
