Crypto investor reduces $50 million to $36,000 following a miscalculated decision.

Aave founder Stani Kulechov indicated that the interface presented several slippage warnings, which the user accepted manually on a mobile device.

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What to know:

• A cryptocurrency trader lost approximately $50 million in a single transaction after exchanging interest-bearing aEthUSDT for aEthAAVE via CoW Protocol.
• Significant losses from slippage occasionally arise in decentralized finance (DeFi) when traders pursue unusually large orders against limited liquidity pools, with arbitrage bots capitalizing on the price discrepancies.
• Aave founder Stani Kulechov mentioned that the interface alerted the user about unusual slippage and necessitated explicit confirmation, which the user accepted on their mobile device.

A cryptocurrency user incurred a loss of nearly $50 million in a single transaction on Thursday after performing a large token swap that resulted in substantial slippage.

Blockchain evidence indicates that the wallet attempted to exchange $50,432,688 aEthUSDT – an interest-earning token representing Tether’s USDT stablecoin deposited into the Aave decentralized lending protocol on the Ethereum blockchain – for aEthAAVE – a similar variant of Aave governance tokens – through the CoW Protocol.

The transaction was executed with over 99% slippage due to inadequate liquidity in the corresponding trading pools, leaving the wallet with only around 327 aEthAAVE tokens, valued at approximately $36,000 post-trade. The remaining value was swiftly captured by arbitrage traders and network intermediaries.

Occasional large losses due to slippage occur in decentralized finance (DeFi) when traders attempt to place unusually large orders against shallow liquidity pools. In these situations, automated arbitrage systems rapidly take advantage of the price dislocations triggered by the trade.

Stani Kulechov, the founder of the Aave protocol, stated that the trade was executed despite several warnings displayed to the user prior to confirming the transaction.

“Earlier today, a user sought to acquire AAVE using $50M USDT through the Aave interface,” Kulechov stated in a post on X. “Given the unusually large size of the single order, the interface cautioned the user about extraordinary slippage and required confirmation via a checkbox.”

According to Kulechov, the user accepted the warning on their mobile device and proceeded with the trade, clearly acknowledging the risk of significant slippage.

"The transaction could not be processed without the user explicitly accepting the risk," he noted, adding that the CoW Swap routers operated as intended and adhered to standard industry practices.

Nonetheless, the outcome was "clearly far from optimal," Kulechov remarked.

Kulechov stated that Aave intends to reach out to the impacted user and return roughly $600,000 in fees generated from the transaction.

The loss follows shortly after approximately $27 million was liquidated on Aave, which some market participants speculate may have been triggered by a temporary pricing issue involving the token wstETH.