key insights:
- Institutions can raise USDC liquidity without immediately selling their Bitcoin holdings.
- DeFi protocols, rather than Circle, determine borrowing costs and liquidation conditions.
- cirBTC gives Bitcoin a new role within Arc’s lending and financial infrastructure.
Circle launched Digital Asset-Backed Borrowing on Sept. 21, giving eligible Circle Mint institutions access to USDC liquidity against Bitcoin. The service operates across Arc and Ethereum and uses third-party lending markets rather than direct credit from the issuer.
The product allows institutions to deposit BTC, mint cirBTC and use the token as collateral. Morpho provides the first supported lending infrastructure, while Circle expects Aave and other protocols to join later.
The structure lets borrowers maintain Bitcoin exposure while accessing dollar liquidity. However, lending rates, collateral requirements and liquidation conditions remain under the control of the selected DeFi protocol.
Circle excludes customers in New York from the borrowing service. Access also remains limited to eligible institutional Circle Mint customers rather than retail users.
cirBTC connects Bitcoin with DeFi markets
The service follows the launch of Circle’s Bitcoin-backed token for smart-contract networks called cirBTC. Circle launched cirBTC on Ethereum in June and extended the token to Arc in Sept. 21.
One cirBTC is equal to one Bitcoin that is stored for the benefit of the token holders. Circle states that the underlying BTC is not mixed in or lent, pledged or rehypothecated.
Chainlink Proof of Reserve’s reserve data is published onchain. Additionally, Circle offers Bitcoin reserve addresses, where market participants can compare the underlying holdings and circulating cirBTC.
As of the last verification, there were 948.7508 cirBTC in circulation and 951.2586 BTC in reserves. Ethereum had 551.7590 cirBTC, while Arc had 396.9919 cirBTC.
The estimated value of the reserves was around near $77.19 million. The numbers may fluctuate according to the minting and redemption of cirBTC.
Circle National Trust protects the original Bitcoin using separate accounts. In July, the trust bank finally got approval from the Office of the Comptroller of the Currency.
Morpho sets borrowing terms on Arc
Eligible customers move their cirBTC into a user-controlled Smart Wallet after minting the token. They then deposit the asset into an approved lending market and borrow USDC against it.
The borrowed USDC moves automatically from the Smart Wallet into the customer’s Circle Mint balance. Customers can also return USDC through the same interface and recover available collateral after reducing their debt.
Morpho currently supplies the first supported market. On Arc, its cirBTC-USDC market showed $18.86 million in outstanding borrowing and $157.85 million in available liquidity.
The market held $176.71 million in total size, with utilization at 10.67%. The displayed data showed no realized or unrealized bad debt during verification on Sept. 22.
The market figures remain dynamic because liquidity and borrowing activity can change. Morpho also controls the applicable rates, collateral limits and liquidation parameters.
An 86% liquidation loan-to-value threshold applied to the Arc market at verification. A borrower could therefore face automatic liquidation if collateral values, oracle readings or other market conditions breach the applicable limits.
Arc adds new institutions to its institutional lending platform
After Arc’s public mainnet launch on Sept., the borrowing launch has arrived. 16. The network features USDC as its native gas asset and aims to focus on payments, tokenized assets, and other financial applications.
By introducing cirBTC, the network’s collateral expands to provide applications with more options to operate on the network. Now, institutions can deploy Bitcoin-backed collateral and integrate with the broader USDC infrastructure.
The division also puts regulated Circle Mint balances apart from the DeFi borrowing stance. Once assets are transferred into the Smart Wallet, they are no longer in control of Circle as they would be in assets under the control of assets in Mint.
The customer is thus still responsible for keeping track of the collateral level and protocol conditions. Circle states that its Smart Wallet employs a multiparty computation system of two in order to create and reverse blockchain transactions, but the company itself can’t as of yet.
The launch also marks an overall trend of institutional crypto lending. Anchorage Digital has previously partnered with Kamino to borrow against SOL tokens staked on the platform, and BitGo launched a new financing offering based on its assets portfolio, which includes multiple digital assets.
Circle’s newest service puts borrowing with Bitcoin on par with its stablecoin system. The anticipated integration with Aave may expand the variety of lending markets accessible via the identical institutional processes.
Conclusion
Circle has successfully integrated these two on-chain services into one institutional borrowing process: BTC custody, cirBTC issuance, and third-party DeFi lending. The model provides another path for eligible customers to access USDC liquidity without the need to sell Bitcoin.
But the risks of credit continue to lie outside of the loaning protocols. However, when using the service, borrowers are responsible for considering the fluctuating rates, the collateral requirements, the movement of the oracles and the rules of liquidation.
