Ethena has been unusually honest about what it built, which makes assessing it easier than most stablecoins. USDe is a tokenised basis trade, not a claim on cash.
The mechanism
The protocol holds collateral — largely staked ETH and other liquid assets — and shorts an equivalent notional in perpetual futures on centralised venues. The long and short offset, producing a roughly stable dollar value. Income comes from staking yield plus perpetual funding, which is usually positive because leveraged traders are usually net long.
The failure mode, stated plainly
If funding turns negative and stays there, the short leg costs money. The reserve fund absorbs that for a period, and beyond that the backing erodes. This has not happened at damaging scale, and it is a known, bounded risk rather than an unknown one — which is more than can be said for several reserved stablecoins whose reserve composition is opaque.
Counterparty structure
Hedges sit on centralised exchanges with collateral held by off-exchange custodians, which limits but does not eliminate exchange failure risk. Given the 2025 Bybit theft and the general history of exchange custody, that exposure is real and Ethena publishes enough detail to size it.
Who should use it
Users who want yield-bearing dollar exposure and understand they are holding a leveraged trade. Nobody should treat USDe as equivalent to a reserved stablecoin, and position sizing should reflect that.