eUSD overview
eUSD is a decentralized, overcollateralized stablecoin minted against eSPY, Own's tokenized S&P 500. It is the first fully collateralized stablecoin backed by a real-world equity asset, and its backing is verifiable onchain every block.
Key properties
| Property | Value |
|---|---|
| Collateral | eSPY (tokenized S&P 500), more collaterals possible per governance |
| Minimum collateral ratio | 150% |
| Liquidation threshold | 130% (5% liquidation bonus) |
| Redemption value | $1.00 of eSPY per eUSD, always, at the oracle price |
| Mint / redemption fees | None |
| Stability fee | 2% per year, accrued into debt |
| Token standard | ERC-20 + ERC-2612 permit, ERC-7802 bridge rails |
| Staked form | sEUSD, an ERC-4626 vault |
How it works
- Get eSPY. Swap USDG for eSPY in the app, or wrap SPY you already hold on Robinhood Chain 1:1 through the PSM, with no fee and no spread.
- Deposit and mint. Deposit eSPY as collateral and mint up to 66% of its value in eUSD (the 150% minimum ratio). Your debt is denominated in dollars; your collateral stays in eSPY, so all S&P 500 upside remains yours.
- Use or stake. eUSD is a standard ERC-20. Stake it for sEUSD to earn yield paid from $OWN trading fees.
- Exit any time. Repay to unlock collateral, close the position entirely, or redeem eUSD at face value. Exits work 24/7, including outside stock market hours.
Design lineage
The CDP engine is a fresh implementation of Liquity v1's battle-tested design: sorted-list riskiest-first redemptions, hint-based O(1) insertion, keeper liquidations with direct burn, and value-neutral redemption as the peg anchor. That mechanism has kept LUSD solvent since 2021. Own adapts it for equity collateral, chiefly through market-hours price rules that Liquity's 24/7 ETH collateral never needed. The full comparison is on the risk parameters page.
Why it is different from USDC or USDT
Fiat-backed stablecoins are IOUs on a bank account: an issuer holds dollars offchain and you trust their attestations. eUSD's backing is onchain and enforced by code, with liquidations and redemptions anyone can trigger. It is also productive: the collateral is the S&P 500, and staking earns real trading fees rather than a share of treasury bill interest kept by an issuer.