Live non-custodial interface. You sign every transaction. Capital is at risk.
Back to collection
Arbitrum One

Sky (sUSDS)

USD
USDC · US dollar
3.60%
live compounded APY
CompoundedLower riskBattle-testedLower feesInstant exit

Swap USDC 1:1 into sUSDS through Spark's PSM (no protocol swap fee beyond gas). sUSDS accrues the Sky protocol rate. Swap back to USDC the same way. Not deposit-insured.

APY history loads in the browser.

How yield works here

You swap USDC 1:1 into sUSDS through Spark's PSM on this chain (no protocol swap fee beyond gas). sUSDS accrues the Sky protocol rate as its exchange rate vs USDC rises. Swap back to USDC the same way. This is not a bank deposit.

Risks to know

  • Smart contract risk in Sky, Spark PSM, and the cross-chain rate oracle.
  • Stablecoin / peg risk — USDS and USDC can trade off $1 in stress.
  • Governance can change the Sky protocol rate, including down to zero.
  • L2 sUSDS is a wrapped ERC-20, not the Ethereum ERC-4626 vault — bridging is a separate risk if you move it across chains.

Cool detail

The PSM is a 1:1 converter, not a pool you trade against, so there is no Curve-style slippage on the swap itself. The number that moves is the Sky rate, not a pool price.

Withdrawal

Swap sUSDS back to USDC in one transaction, subject to PSM liquidity.

Learn more

Spark PSM documentation

Not investment advice. Yield is not insured or guaranteed. Capital is at risk. You sign every transaction from your own wallet.