DeFi Disaster: How Ignoring Slippage Warnings Cost One Trader $50 Million on Aave
A trader suffered a catastrophic loss of nearly $50 million on Aave due to extreme slippage during a large token swap, converting $50.4 million into only 327 AAVE tokens worth about $36,000. Despite multiple explicit warnings about slippage, the trader proceeded, and an MEV bot exploited the transaction for nearly $10 million in profits. Aave plans to refund approximately $600,000 in protocol fees to the affected trader.
TLDR Extreme slippage on Aave led to a devastating loss of nearly $50 million for one cryptocurrency trader in a single swap transaction. The transaction converted $50.4 million into approximately 327 AAVE tokens valued at just $36,000. The trader acknowledged and bypassed several explicit slippage warnings on mobile before executing the trade. An MEV bot executed a sandwich attack on the same transaction, extracting close to $10 million in profits. The Aave protocol announced plans to refund approximately $600,000 in protocol fees to the impacted trader. On Thursday, March 12, 2026, a cryptocurrency trader experienced one of the most devastating losses in DeFi history, losing approximately $50 million in just one transaction. The incident occurred while executing a token swap on Aave, a prominent decentralized finance platform. The wallet in question, freshly funded via Binance, contained $50,432,688 worth of aEthUSDT. These interest-bearing tokens represent Tether’s USDT stablecoin deposited within the Aave lending ecosystem operating on Ethereum. The trader initiated a swap to exchange the entire balance for aEthAAVE, the tokenized version of Aave’s governance token. This transaction was processed through CoW Protocol and executed on the SushiSwap decentralized exchange. Due to the massive size of the order relative to available pool liquidity, the swap suffered catastrophic slippage exceeding 99%. The final result was a mere 327 AAVE tokens worth roughly $36,000. Effectively, the trader paid approximately $154,000 for each AAVE token when the prevailing market rate stood at around $114. What the Warnings Said Stani Kulechov, founder of Aave, verified that the platform’s user interface had displayed prominent warnings before execution. In a post on X, he explained that the system alerted the user about “extraordinary slippage” resulting from the “unusually large size of the single order.” Earlier today, a user attempted to buy AAVE using $50M USDT through the ...
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