DeFi protocol Ethena has partnered with Binance to back its $4.9 billion synthetic dollar USDe with equity basis trades, purchasing tokenized bStocks while shorting matching equity perpetual contracts. Following the announcement, native token ENA surged 12% in 24 hours to $0.24.
Expanding USDe Collateral Into Tokenized Equities
Under the new arrangement, Ethena holds spot bStocks—issued by Binance affiliate BTech Holdings Limited and backed 1:1 by custodied shares—and shorts matching equity perpetual futures to collect funding rates paid by leveraged long positions. Binance's equity basis has averaged approximately 11% annualized over the previous six months, with eligible delta-neutral accounts receiving lower priority in auto-deleveraging.
This shift follows previous collateral expansion efforts, such as when Ethena added Bitcoin backing in April 2024 at a $2 billion supply. USDe supply later peaked at $14.8 billion on October 4, 2025. Ethena stated that market opportunity in equity perpetuals is expected to exceed the $15 billion+ captured in crypto perpetuals during the last cycle, as institutional appetite grows for on-chain portfolios and real-world assets.
Kairos Risk Framework and Market Structure
The allocation follows a risk framework produced by Kairos Research for the Ethena Risk Committee. To qualify, an asset requires $25 million in perpetual open interest over 14 days, 30 days of funding history, and a corresponding tokenized stock on the venue. Only 17 of Binance's 67 pairs met the criteria, including Nvidia, Tesla, and SpaceX.
Binance currently holds $2.14 billion of the $2.9 billion in open interest measured across four exchanges. Data from CryptoQuant indicates Binance processed 76% of July's $250 billion in equity perpetual trading volume. Additionally, Binance's tokenized U.S. equities reached $100 million in assets within two weeks of launching in June.
Despite the yield potential, the Kairos report made bStock approval conditional on a side letter with the issuer. Holders possess no proprietary interest in underlying backing shares, and each bStock contract relies on a single upgrade key. Across 37 historical earnings events, underlying stocks gapped 9.9% on average while the hedged basis position moved 20.3 basis points. Annualized carry on approved Binance names had recently halved in a month to about 7%, with two names recording negative yields.
Key Takeaways
- Ethena partners with Binance to introduce bStocks equity basis trades for USDe backing.
- 17 stock pairs passed risk criteria, including Nvidia, Tesla, and SpaceX.
- Binance holds $2.14 billion of the $2.9 billion equity perpetual open interest across four exchanges.
- Token ENA rose 12% to $0.24 following the announcement.
Why It Matters
Ethena's expansion into tokenized equity basis trades marks a critical evolution for synthetic dollars looking beyond crypto-native yield sources. By tapping into Binance's dominant equity perpetual market share, USDe can scale its collateral base without relying solely on crypto market funding rates, which often compress during broader crypto market downturns. However, introducing centralized stock issuers and single-upgrade-key smart contracts introduces novel corporate counterparty risks that could test USDe's resilience during extreme equity market volatility.
