How kUSD Works
kUSD is a yield bearing synthetic dollar. It holds a stable value of $1.00 while continuously generating yield for its holders. Here is how it works at a high level.
The Deposit Flow:
When you deposit a supported asset into the KerneVault smart contract, you receive kUSD in return. Deposit $2,000 worth of assets and you receive 2,000 kUSD.
Your deposited collateral immediately begins earning Ethereum staking rewards. At the same time, the protocol opens a short position on ETH perpetual futures equal in value to your deposit. This short position earns funding rate payments from leveraged traders on the other side of the market.
The two positions together create a delta neutral structure: you have zero net exposure to ETH price movements, but you earn yield from both the staking rewards and the funding rate payments simultaneously.
How Yield Accrues:
kUSD does not rebase. It does not automatically increase in quantity in your wallet. Instead, yield is reflected through vault share appreciation: the amount of underlying collateral you receive when you redeem your kUSD grows over time as yield compounds.
Think of it like a savings account where the balance quietly grows, except here the growth comes from real, verifiable on chain yield sources rather than a bank's promise.
In practical terms, depositing and holding kUSD over time means your redemption value grows as yield compounds in the underlying collateral. Actual APY will vary based on live market conditions and is never guaranteed.
Composability:
kUSD is an ERC 20 token on Base. It can be held in any wallet, transferred freely, used as collateral in lending protocols, traded on decentralized exchanges, and composed into any DeFi application that accepts standard tokens.
Because kUSD does not rebase, it avoids the technical compatibility issues that rebasing tokens often cause. This was a deliberate design choice. Many DeFi protocols (lending markets, AMMs, vaults) struggle with rebasing tokens because the balance changes unexpectedly. kUSD works everywhere a normal ERC 20 token works.
Peg Stability:
kUSD maintains its $1.00 peg through multiple mechanisms working together:
- Full collateral backing: every kUSD is backed by at least $1.00 in underlying collateral value
- Peg Stability Module (PSM): allows direct 1:1 conversions between kUSD and USDC at a minimal conversion spread, creating a structural arbitrage floor
- Insurance Fund: provides additional capital to defend the peg in extreme scenarios
- Redemption rights: kUSD holders can always redeem for underlying collateral, creating a natural price floor
If kUSD ever trades below $1.00 on a DEX, arbitrageurs can buy kUSD cheaply and convert it to USDC at $1.00 through the PSM, capturing the difference. This arbitrage pressure continuously supports the peg from below.