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Ethena, the team behind the yield-bearing synthetic stablecoin USDe, said its total unrealized profit-and-loss exposure to Binance was about $8.8 million — an amount it said is well below its excess reserve fund of more than $60 million — after a security incident at the exchange, according to AMBCrypto.
The protocol said all USDe backing is held offchain with its custodians rather than on centralized exchanges. Crypto Briefing reported that Ethena first flagged a potential security incident involving Binance on October 29, 2026, and said exchange-exposed collateral sits with off-exchange settlement providers including Copper and Ceffu. Crypto Briefing also named Coinbase in AMBCrypto’s account of the custody arrangements, while AMBCrypto additionally names Coinbase alongside Copper and Ceffu.
Also read: Ethena falls to $0.219 as outflows reach $104M
Key facts
- Ethena put total unrealized PnL exposure to Binance at about $8.8 million, below an excess reserve fund of more than $60 million.
- Independent attestors Chainlink and Llama Risk confirmed USDe stays overcollateralized by more than $60 million at over 101.0%, according to AMBCrypto.
- Real-world-asset basis trades account for $51 million, or 1.2%, of the $4.54 billion in USDe collateral; crypto basis is about $628 million, or 17%, spread across Binance, Deribit, Coinbase, Huobi, Bybit, OKX and Hyperliquid.
- DeFi lending is the largest collateral share at $1.3 billion across Aave and Morpho, and Aave paused operations after the Binance hack.
- The Binance attacker sold 217 million ENA ($34 million) for ETH, and ENA fell 16% to below $0.19, per AMBCrypto.
Why the community pushed back
The concern did not come from nowhere. Ethena and Binance signed a partnership a month before the incident covering RWA basis trades built on Binance’s bStocks, which were pitched with an 11% yield. AMBCrypto reported that the real-world-asset basis accounts for $51 million, or 1.2%, of the $4.54 billion collateral pool — a small slice next to the platform-level exposure the deal might imply.
RWA and crypto basis together come to about 18% of USDe collateral exposure to trading platforms. The crypto basis leg is spread across Binance, Deribit, Coinbase, Huobi, Bybit, OKX and Hyperliquid. Aave’s pause after the hack gave the contagion anxiety a concrete anchor, since DeFi lending is the single largest collateral bucket at $1.3 billion across Aave and Morpho.
The custody argument
Ethena’s defense rests on off-exchange settlement. Under the arrangement, custodians hold the backing, the exchange sees the collateral and extends trading credit against it, but does not take the keys. Mikhail Kedzel, founder of Yumi Finance, said Binance offers such off-chain setups to top institutional players and that Ethena does not keep funds in the exchange’s hot wallet.
Crypto Briefing noted that USDe is not backed by bank deposits but maintained through delta-neutral hedging, mostly in perpetual futures on centralized venues — which is why Ethena needs exchanges for hedging without parking collateral on them. The two reports differ in emphasis: Crypto Briefing described the Binance situation only as a potential incident whose nature and scope were not disclosed, while AMBCrypto referred to it directly as a hack. Crypto Briefing’s data framed ENA at $0.190, down 8.2% over 24 hours, with a $2.5 billion market cap and $525.3 million in 24-hour volume, as of October 29.
Why it matters
USDe holders are the group most directly affected, because the value of the token depends on the collateral being both real and reachable. Ethena’s public accounting asks holders to trust third-party attestations and a custody structure that separates trading access from asset ownership. The episode also shows how a failure at one large venue can pull in lending markets like Aave and reprice a governance token like ENA even when the issuer says its own book is intact.
What to watch
Two data points will settle the argument: whether the attacker’s ENA sales keep pressuring the token, and whether Chainlink’s and Llama Risk’s attestations of overcollateralization hold in the next monthly update. AMBCrypto reported that it was unclear whether Ethena’s clarification would be enough to stop the pullback. This is not financial advice, and crypto markets are volatile and uncertain.
Reported by AMBCrypto.
Sources: AMBCrypto, Crypto Briefing