Ethena ships two tokens that look similar and behave very differently. USDe is the synthetic dollar — a $1-pegged unit backed by delta-neutral collateral. sUSDe is the staked version — the same dollar exposure plus a claim on the funding-rate yield Ethena's hedging book earns. If you hold USDe, you hold a stable unit. If you stake into sUSDe, you take on the yield, the volatility, and the counterparty risk of the basis trade behind the peg.
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This article breaks down what each token is, how the basis trade actually generates yield, what the historical APY range has looked like, what happens when funding flips negative, and the risks that don't show up in the headline rate. For a deeper primer on sUSDe alone, see sUSDe explained: Ethena's yield-bearing stablecoin.
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USDe is Ethena's synthetic dollar. It targets a $1 peg by holding spot crypto collateral (mostly liquid-staked ETH and BTC) and shorting an equal-notional perpetual futures position on centralized exchanges. The two legs cancel out price exposure, so the dollar value of the backing stays roughly flat regardless of where ETH or BTC trades.
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USDe is the unstaked unit. Holding it gives you peg exposure but no yield — the yield accrues to sUSDe holders only. As of May 2026, USDe supply sits around $3.9B per DeFiLlama, with circulation across Ethereum, BNB Chain, Arbitrum, Solana, and several other EVM chains via LayerZero OFT messaging. The peg is enforced by primary-market mint and redeem with whitelisted market makers, plus arbitrage on secondary venues.
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sUSDe is the staked, yield-bearing receipt token. You deposit USDe into the Ethena staking contract and receive sUSDe at a ratio that grows over time as protocol revenue is streamed in. Unstaking has a seven-day cooldown — that delay is what makes the yield possible without forcing fire-sales when the hedging book needs to rebalance.
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The yield has two components. First, the staked-ETH portion of collateral earns consensus and execution-layer rewards (around 3% on the LST share). Second, and usually larger, the short perpetual leg captures funding rates paid by leveraged longs on exchanges like Binance, Bybit, OKX, and Deribit. When perp markets are in contango — the normal regime in a bull market — longs pay shorts to hold the position, and that flow is what makes sUSDe yields visible.
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The basis trade is mechanically simple. Ethena custodies spot ETH (often as stETH or a similar LST) at off-exchange settlement venues like Copper, Ceffu, and Fireblocks. It then opens an equal-dollar short on an ETH perpetual at a partner exchange. If ETH goes up 10%, the spot leg gains 10% and the short loses 10% — net zero. If ETH falls, the inverse happens. Net delta on the book stays near zero.
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The yield comes from funding. Perp markets use funding payments to pull the perp price toward spot. When perps trade above spot (positive funding), shorts collect from longs every eight hours. Ethena's short leg is on the receiving side of that flow, and the cumulative payments — denominated in USD — flow back to the protocol and onto sUSDe.
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Headline sUSDe APY has ranged roughly from low single digits to over 30% since launch in early 2024, with the bulk of the time spent between 5% and 15%. The 2024 bull run produced sustained funding above 20%; the cooler 2025 stretch and the early-2026 chop pulled the trailing rate into the high single digits. Ethena publishes a live rate on app.ethena.fi, and DeFiLlama tracks the historical curve under its Ethena protocol page.
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The APY is not a fixed coupon. It floats every epoch based on funding-rate prints across the venues Ethena hedges on, weighted by collateral allocation. A reserve fund — funded from a slice of revenue during good months — exists to smooth small negative-funding intervals.
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Negative funding is the scenario where perp markets trade below spot — usually during sharp selloffs when leveraged longs unwind and shorts dominate. In that regime the short leg of the basis trade pays funding instead of receiving it. If the negative print is small or short-lived, Ethena's reserve fund absorbs it and sUSDe APY drops toward zero rather than going negative.
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If negative funding persists at meaningful magnitude, the protocol has flexibility to rotate collateral — for example, holding a larger share in stablecoins or tokenized treasuries that earn a baseline yield without funding exposure. Onchain analyst Tom Wan has tracked this rotation publicly: during the June 2024 funding-rate compression, Ethena's USDT and tokenized-treasury share of backing rose to absorb the regime change. The peg held; the yield compressed.
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USDe and sUSDe live natively on Ethereum and bridge to BNB Chain, Arbitrum, Base, Mantle, Solana, and a handful of other EVM chains via LayerZero. Money markets like Aave, Morpho, and Pendle list one or both as collateral or as principal-token splits. Pendle in particular has been the largest sUSDe trading venue — splitting sUSDe into a fixed-yield PT and a variable YT lets users lock a known APY or take a leveraged view on funding rates.
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USDe also appears on Bybit and a growing list of centralized venues as a margin asset. That cross-venue acceptance is part of why Ethena can run the hedging book at scale — counterparties in the trade are also distribution channels.
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The basis trade is not free money. Three risk vectors are worth naming.
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Custodian and exchange counterparty risk. Spot collateral sits with off-exchange settlement custodians. The short leg sits at centralized exchanges. A custodian failure, exchange insolvency, or settlement freeze (the FTX scenario) would force a hard unwind at unfavorable prices. Ethena spreads exposure across multiple venues to limit any single-point failure.
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Funding-rate persistence. The yield depends on positive funding being the long-run regime. If perp markets stay in backwardation for an extended stretch, the reserve fund depletes and APY pins at zero or negative. This has not happened at scale yet, but it is the main multi-month risk.
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Liquidation and basis-blowout risk. If a venue's perp price decouples sharply from spot during a dislocation (delisting, exchange outage, oracle failure), the short leg can take a mark-to-market loss before it can be rolled. Ethena uses cross-margining and conservative leverage to limit this, but it is structurally present.
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The sUSDe yield comes from a fundamentally different source than its peers. sUSDS pays the Sky Savings Rate, set by Sky governance and backed by DAI/USDS lending and tokenized treasuries. Aave's GHO earns yield indirectly through the Aave lending stack. Tokenized treasuries like BUIDL and USDY pay the T-bill yield directly. sUSDe is the only major one earning crypto-native yield — funding rates — which means it scales with crypto market activity, not with the federal funds rate.
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For a sustained low-rate environment plus active perp markets, sUSDe outperforms. For a high-rate environment with quiet perp markets, treasury-backed stables win. Yield aggregators rotate between these regimes automatically, often via Pendle PT/YT splits.
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Supply and chain-distribution figures: DeFiLlama stablecoin and Ethena protocol dashboards (May 2026 snapshot). Yield mechanism, collateral composition, custodian set, and reserve-fund design: Ethena Labs documentation at ethena.fi/docs. Historical APY range and funding-regime behavior cross-referenced against Tom Wan's onchain analysis on Dune. Live yield rates change every epoch; check app.ethena.fi for current numbers before sizing a position.
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