What Happens When You Ignore Slippage? Single Trader Just Acquired in $50M Exchange

Despite clear warnings, the trader confirmed a huge change of $ 50M and received only 324 Aave tokens.

A user tried to buy $50 million worth of AAVE tokens for Tether through the Aave interface on March 12, but the trade was executed incorrectly after the user received a warning about excessive liquidity.

According to the founder and CEO of Aave Labs, Stani Kulechov, the transaction involves one order of significant size placed through the Aave interface, which includes the routing infrastructure provided by CoW Swap. Due to the unusually large order size, the interface displayed a warning about unusual smoothness and required a clear confirmation before the exchange could proceed.

$50M Trade Gone Bad

The warning appears as a confirmation checkbox, which the user must manually accept before completing the task. Kulechov said the user confirmed the warning on the mobile phone and chose to continue trading despite the slippage notice. Due to the execution conditions and the liquidity available through the channel, the user finally received only 324 AAVE tokens in return for the 50 million USDT order.

Kulechov said the work would not progress unless the user clearly acknowledges the warning and confirms acceptance of the risks associated with the interface. He said the routing infrastructure worked as designed and that integration with CoW Swap followed standard procedures commonly used throughout the DeFi industry.

However, the final execution was worse than would be expected in a more liquid market place. Kulechov noted that events involving high liquidity can occur in DeFi when users try to make transactions that are larger than the liquidity available in the relevant markets, although he said that the scale of these particular transactions is much larger than what is usually seen in the space.

Responding to the incident, the manager said that the Aave team sympathizes with the user and will try to contact them. He added that the protocol plans to return approximately $600,000 in royalties collected from these transactions. Kulechov said that while maintaining the permissionless environment of DeFi is still important, the industry can still build additional safety nets to help reduce the likelihood of similar incidents in the future.

User Freedom vs Protection

CoW Protocol, which is a DEX aggregator, took to X and explained that “blocking users from making trades removes choice and can lead to negative consequences in some cases.” It also added that trades like this show that “DeFi UX is still not where it needs to be to protect all users. As a team, we are now reviewing how we balance strong protections with preserving user autonomy.”

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The platform has asserted that it will return any funds sent to the CoW DAO.

The incident quickly drew reactions from the entire crypto community. Prominent crypto analyst, Autism Capital, described the event as a “teachable moment for money.”

Meanwhile, another crypto analyst, KJ Crypto, questioned the motive behind such a large buying effort and wrote on Twitter that it raises questions as to why anyone would want to acquire Aave for $50 million in a single transaction.