hyAUSD Collateral: Borrow AUSD or USDC
Posting hyAUSD as collateral lets a holder borrow AUSD or USDC without redeeming the vault position, so the vault keeps earning while the loan funds liquidity or a leveraged stablecoin strategy. This piece walks through both markets, the leverage ceiling implied by max LTV, a worked net APY example, and the conditions that turn the spread negative.
Tom, Marketing at Curvance 6 min read
hyAUSD is a yield-bearing vault position that can be posted as collateral in Curvance lending markets. A holder can borrow AUSD or USDC without first redeeming the vault position, either to access stablecoin liquidity or to build a leveraged stablecoin yield strategy.
The trade-off is direct: the vault position can keep earning, but the loan adds interest costs, liquidation exposure, and the possibility that the yield spread turns negative. Institutional and treasury users should treat this as an actively managed balance-sheet strategy, not a fixed-return product.
What is hyAUSD?
hyAUSD is the share token users receive after depositing AUSD into the Curvance High Yield AUSD Vault. The vault allocates AUSD across approved lending markets and reflects accrued lending income in the amount of AUSD represented by each share.
The share structure follows the logic of a tokenized vault: users deposit an underlying asset, receive shares, and redeem those shares for a proportional claim on managed assets. The ERC-4626 tokenized-vault standard defines this asset-and-share model.
The basic flow is:
- Deposit AUSD into the Curvance High Yield AUSD Vault.
- Receive hyAUSD representing a proportional vault share.
- The vault allocates AUSD across supported lending markets.
- Lending income accrues to the vault position.
AUSD is issued by Agora. Readers evaluating stablecoin risk can review Agora's monthly reserve attestations before using AUSD or a vault denominated in it.
Borrowing against a position that keeps earning
Redeeming a vault position converts hyAUSD back into AUSD. Posting hyAUSD as collateral takes a different path: the vault shares remain in the lending position while the borrower draws a supported stablecoin against them.
A borrower might use the proceeds to fund operations, deploy liquidity elsewhere, maintain AUSD exposure while obtaining USDC, or redeposit borrowed assets into the vault. Curvance bases borrowing capacity on the collateralization ratio and the liquidity available in the isolated market, as explained in the protocol's borrowing documentation.
Interest accrues on the debt. The borrower must monitor the current loan-to-value ratio, position health, available liquidity, and the difference between vault yield and borrowing cost.
The two hyAUSD collateral markets
hyAUSD to AUSD
In this market, users post hyAUSD collateral and borrow AUSD. The collateral is a vault position denominated in the same stablecoin as the debt, so an AUSD loop does not require a stablecoin swap.
This path may suit users who want to:
-Borrow more AUSD against an existing vault position.
-Build a direct leveraged AUSD strategy.
-Avoid repeated swaps while looping.
-Keep the collateral and debt within the same underlying asset system.
The same-asset structure removes AUSD-versus-USDC price divergence from the loop, but it does not remove AUSD depeg risk, borrowing costs, smart-contract risk, or liquidation exposure.
hyAUSD to USDC
In this market, users post hyAUSD collateral and borrow USDC. Circle describes USDC as a digital dollar backed by highly liquid cash and cash-equivalent assets, with monthly reserve attestations.
This path may suit users who want to:
-Access USDC without redeeming hyAUSD.
-Deploy capital in applications that support USDC.
-Maintain the High Yield AUSD Vault position while borrowing another stablecoin.
-Use USDC as working capital or collateral elsewhere.
The collateral is tied to an AUSD-denominated vault while the debt is denominated in USDC. A divergence between the two stablecoins can reduce position health even if each asset is designed to track the U.S. dollar.
AUSD or USDC: which market fits the use case?
The AUSD market is the more direct route for leveraged exposure to the High Yield AUSD Vault. Borrowed AUSD can return to the vault without a swap, which avoids swap fees and reduces execution complexity.
The USDC market provides a broadly integrated stablecoin for use outside the vault. It adds cross-stablecoin price risk, and a loop requires converting USDC into AUSD before redepositing.
The choice depends on the use of proceeds, market liquidity, current borrowing rates, swap depth, and the user's tolerance for stablecoin divergence. Review the live terms in the Curvance application before opening either position.
How leveraged stablecoin yield works
A borrower can redeposit borrowed capital into the vault to increase yield-bearing exposure. A simplified AUSD loop follows this sequence:
- Deposit AUSD into the High Yield AUSD Vault.
-Receive hyAUSD.
-Post hyAUSD as collateral.
-Borrow AUSD.
-Deposit the borrowed AUSD into the vault.
-Receive additional hyAUSD.
-Repeat until reaching the chosen leverage level.
Each cycle increases the yield-bearing collateral and the outstanding debt. A USDC loop adds a swap from USDC to AUSD during each cycle, which introduces fees, slippage, and liquidity constraints.
Maximum leverage and borrowing limits
The theoretical leverage available through recursive borrowing depends on the market's maximum loan-to-value ratio:
Maximum leverage = 1 / (1 - maximum LTV)
At a hypothetical 90% maximum LTV: 1 / (1 - 0.90) = 10x
This is a mathematical ceiling, not a target. A position near its maximum LTV has little capacity to absorb interest accrual, oracle changes, vault losses, stablecoin divergence, or market volatility. Available liquidity can also limit borrowing below the amount implied by the collateral ratio.
Estimating yield on a looped position
A simplified estimate is: Estimated net APY = (vault APY x leverage) - (borrow APY x borrowed leverage)
Borrowed leverage equals total leverage minus the user's original capital. Assume these illustrative rates:
-Vault APY: 12%
-Borrow APY: 6%
-Total leverage: 5x
The calculation is: (12% x 5) - (6% x 4) = 36%
The example does not account for compounding differences, transaction costs, changing rates, incentives, slippage, or swap fees. A USDC loop must also deduct the cost of converting USDC into AUSD during each cycle.
The spread between vault yield and borrowing cost drives the result. When vault yield exceeds the borrow rate, leverage magnifies the positive spread. When the borrow rate moves above vault yield, leverage magnifies the negative spread.
Why the yield spread changes
Vault yield and borrowing rates both move. The vault earns from AUSD supplied across lending markets, while each hyAUSD borrowing market responds to its own liquidity and utilization. Curvance documents how interest rates adjust with market demand and pool utilization.
The spread can narrow or disappear when borrowing demand rises, vault lending rates fall, liquidity changes, incentives expire, or swap costs increase. Check the live vault APY and borrow APR before entering, then continue monitoring both sides of the position.
Risks of borrowing against hyAUSD
-Liquidation risk: Interest accrual, vault losses, or price divergence can reduce position health. Curvance explains its thresholds and partial-to-hard liquidation process.
-Rate risk: Vault APY and borrow APR float. A positive spread can compress or turn negative.
-Stablecoin risk: A sustained AUSD depeg affects the vault and AUSD debt. The USDC market also exposes the position to AUSD-USDC divergence.
-Oracle risk: Stale, manipulated, or divergent prices can affect collateral valuation. Curvance documents its dual-oracle checks and price guards.
-Smart-contract risk: Vaults, lending markets, and integrations can contain defects. Review the Curvance audits and bug-bounty information.
-Liquidity and unwind risk: Thin liquidity can restrict borrowing, raise swap costs, or make a leveraged position more expensive to close.
The protocol's lending-risk overview provides a concise starting point for due diligence. It does not replace independent review of the live market, contracts, stablecoin reserves, and the user's own risk limits.
Who should consider these markets?
The markets are designed for users who already want exposure to AUSD and the High Yield AUSD Vault but want more utility from that position. They may fit borrowers who need stablecoin liquidity, want a same-asset AUSD loop, or can actively manage a leveraged rate strategy.
They do not fit users seeking a passive fixed return. A leveraged borrower must be prepared to track rates, position health, stablecoin prices, and available liquidity. Lower leverage or an unborrowed hyAUSD position may be more appropriate when active monitoring is not practical.
How to use hyAUSD as collateral
-Open the High Yield AUSD Vault and deposit AUSD.
-Receive hyAUSD.
-Select a supported hyAUSD lending market in the Curvance app.
-Post hyAUSD as collateral.
-Choose AUSD or USDC as the borrowing asset.
-Select a borrowing amount below the live maximum LTV.
-Monitor position health, the borrow rate, vault APY, and available liquidity.
-Repay the borrowed asset before withdrawing the collateral.
Borrowers building an AUSD loop can redeposit the borrowed AUSD into the vault. A USDC loop requires an additional USDC-to-AUSD swap. Confirm live market parameters and transaction steps in the application before signing.
This document explains protocol mechanics and does not provide financial, legal, or tax advice. Rates and market parameters can change.
Related posts
Using Pendle PT-AUSD as Collateral on Curvance
TLDR; PT-AUSD is now live as collateral on Curvance. For anyone holding Pendle principal tokens, that changes what the position can do. Instead of sitting idle until maturity, PT-AUSD can back a loan while its redemption value stays intact. This post covers what a Pendle PT is, why a principal token works as lending collateral, and what becomes possible once PT-AUSD is deposited on Curvance.
The Curvance High Yield Vault: Optimized AUSD Yield with hyAUSD
The Curvance High Yield Vault simplifies AUSD yield by automatically allocating capital across Curvance lending markets and rebalancing as conditions change. Deposit AUSD, receive hyAUSD, and gain access to an optimized, composable yield-bearing position designed to account for real market liquidity, rate impact, and risk controls.