Ethena

Ethena is a synthetic dollar protocol built on Ethereum, issuing USDe, a delta-neutral stablecoin backed by spot ETH (or BTC) positions paired with equivalent short perpetual futures on centralized exchanges. This structure offsets price movements, maintaining a stable $1 value while generating yield from staking rewards and funding rates.

Its core value proposition addresses the pain point of centralized stablecoins like USDT and USDC, which rely on opaque fiat reserves and offer no yield. USDe provides a decentralized, crypto-native alternative that is fully backed on-chain and income-generating, with sUSDe (staked USDe) offering variable APY derived from staking and perp funding.

In the past six months (2026-03-02 to 2026-09-02), Ethena underwent significant evolution. USDe supply crossed $5B in early 2026, becoming the largest synthetic dollar by float. In April 2026, Ethena executed its largest collateral restructuring, cutting perpetual positions to roughly 20% of backing and shifting reserves into stablecoins, DeFi lending, CLOs, and investment-grade corporate bonds. This move reduced reliance on funding rates and diversified risk into traditional assets. Ethena also partnered with Janus Henderson to distribute tokenized CLO funds and integrate USDe into institutional cash management. The reserve fund surpassed $80M, and only 11% of AUM now drives $270M in annualized fees, reflecting improved capital efficiency.

However, during the October 2025 market crash, USDe's market cap dropped 60% and ENA fell 83%, exposing vulnerabilities in the delta-neutral model under extreme stress. While the peg held within $1 ± 0.5%, the episode highlighted risks of venue insolvency, negative funding, and mass redemption pressure.