Crypto Gloss

Ethena / USDe

Ethena is a synthetic dollar protocol that creates USDe (pronounced “you-es-dee”), a stablecoin backed not by fiat bank deposits or overcollateralized crypto, but by a delta-neutral position: ETH and BTC are held as collateral while equivalent short perpetual futures positions are opened on centralized exchanges. The fund rate income from those short positions (when markets are in contango) is passed to sUSDe (staked USDe) holders as yield — what Ethena calls the “Internet Bond.” Ethena launched in late 2023, grew to >$3B in total supply within 6 months, and became one of the fastest-growing DeFi protocols in history.

How USDe Maintains Its Peg

Delta-neutral mechanism:

Suppose Ethena holds $100 of ETH as collateral:

  1. Open a short perpetual futures position on ETH worth -$100 notional
  2. Net position: +$100 ETH spot – $100 ETH short = $0 ETH delta (price-neutral)
  3. Regardless of ETH price: if ETH doubles, collateral is worth $200 but short loses $100 → still $100 net
  4. The $100 in collateral supports exactly $100 of USDe — the peg is maintained by math

Yield source (funding rates):

When crypto markets are in contango (futures price > spot price):

  • Long perpetual holders pay shorts the funding rate (e.g., 15-25% annualized in bull markets)
  • Ethena’s short positions collect this funding
  • Funding income → distributed to sUSDe stakers as yield

The “Internet Bond”:

Ethena frames sUSDe yield as the crypto-native equivalent of US Treasury yield. Historically:

  • Crypto markets in bull cycles: Funding rates 15-50% APY
  • Bear markets: Funding rates near zero or occasionally negative (shorts pay longs)
  • The yield fluctuates with market conditions; advertised as “Internet Bond” rate

Yield Numbers

At peak in early 2024:

  • sUSDe APY reached 27%+ during the bull market
  • Average 2024 yield: approximately 15-20% (varies significantly)
  • Bear market / post-peak: drops toward 5-8%

This compared favorably to:

  • USDC/USDT Aave/Compound yield: 5-8%
  • US Treasury yield: 4-5%
  • MakerDAO DAI savings rate: 5-8%

The yield differential drove massive USDe adoption.

Custodial Risk

USDe is NOT fully decentralized:

A critical design characteristic often misunderstood:

  1. ETH/BTC collateral is held with OES (Off-Exchange Settlement) custodians: Copper, Ceffu (Binance’s institutional custodian), Cobo
  2. The short futures positions are opened on centralized exchanges: Binance, OKX, Bybit, Deribit
  3. This means Ethena has counterparty risk to: exchange insolvency (FTX-style), custodian failure

Risk management:

  • Custodians use MPC (multi-party computation) keys; no single signing
  • Collateral stays custody-side; not deposited into CEX (only margin deposited)
  • Multiple CEXes used for diversification

Negative Funding Risk

When markets go bear and funding rates turn negative:

  • Ethena’s short positions COST yield rather than collecting it
  • USDe peg can break if losses exceed reserve fund

Reserve fund:

Ethena maintains a reserve fund (funded from protocol revenue) to absorb negative funding periods. Historical BTC/ETH negative funding periods lasted 2-8 weeks; Ethena’s reserve was sized to cover these expected periods.

ENA Token

Ethena’s governance token:

  • Controls Ethena governance (risk parameters, asset mix, protocol upgrades)
  • Airdropped to early users in April 2024; one of 2024’s major airdrops
  • ENA price sensitive to USDe TVL (higher TVL = more revenue = more ENA value)
  • “Shard” campaigns: Ethena ran incentive campaigns where using USDe earned “shards” toward ENA allocation

Backers

Ethena raised funding from:

  • Dragonfly Capital, Brevan Howard Digital, Franklin Templeton, Maelstrom (Arthur Hayes’ fund)
  • Arthur Hayes was publicly bullish on Ethena and wrote extensively about it as the “Internet Bond” in his Substack — creating significant visibility for the protocol

How to Use Ethena

Mint USDe:

  1. Visit app.ethena.fi
  2. Connect MetaMask or any EVM wallet
  3. Deposit: ETH, stETH, USDT, USDC, BTC (via WBTC)
  4. Receive USDe at 1:1 ratio

Stake for yield:

  1. Approve USDe → sUSDe conversion in the app
  2. sUSDe balance grows via rebasing; redeem for more USDe after any time

DeFi integrations:

USDe and sUSDe are integrated as collateral in Aave, Morpho, Curve, Uniswap — enabling additional yield on top of base funding rate yield.

For large positions, secure with . Buy initial ETH on a centralized exchange to fund USDe minting.

Social Media Sentiment

Ethena is one of the most-discussed DeFi protocols launched post-FTX. Arthur Hayes’ public endorsement brought enormous institutional awareness. Supporters argue USDe is the closest thing to a sustainable high-yield stablecoin with a transparent, auditable mechanism. Critics (most prominently Ansem and Cobie on CT) raised early concerns about the “DeSci spiral” risk if USDe TVL grows too large and CEX funding rate compression eliminates yield. The protocol survived its first bear cycle (late 2024 market correction) without breaking the peg — increasing confidence. The centralized custodian/CEX dependence is the core ongoing criticism vs. fully on-chain stablecoins.

Last updated: 2026-04

Related Terms

Sources

Hull, J. C. (2018). Options, Futures, and Other Derivatives (10th ed.). Pearson.

Klages-Mundt, A., Harz, D., Gudgeon, L., Liu, J. Y., & Minca, A. (2020). Stablecoins 2.0: Economic Foundations and Risk-Based Models. AFT ’20.

Clark, J., Demirag, D., & Moosavi, S. (2020). Demystifying Stablecoins. ACM Queue.

Gudgeon, L., Perez, D., Harz, D., Livshits, B., & Gervais, A. (2020). The DeFi Protocols for Loanable Funds: Interest Rates, Liquidity and Market Efficiency. AFT ’20.

Adams, G., & Acharya, V. (2023). Decentralized Stablecoin Designs: Comparing Risk Profiles of Algorithmic, Overcollateralized, and Basis-Trade Models. SSRN.