Circle Expands Bitcoin-Backed USDC Borrowing on Morpho Arc
Summary
- Circle enables BTC-backed USDC loans via Morpho
- Aave considers higher LTV reducing cushions
- Oracle exploit shuts down Full Sail protocol
Circle launched Digital Asset-Backed Borrowing on September 22, 2026. The update lets eligible institutions borrow USDC against cirBTC collateral through Circle Mint on Arc and Ethereum. The service runs on Morpho and uses market-set rates for bitcoin-borrowing.
Institutions bring their Bitcoin holdings straight into DeFi lending pools. They skip asset sales entirely. Direct access to circle-usdc liquidity opens up right away.
The timing aligns with growing demand for collateral-efficient stablecoin access in regulated environments.
Context
Circle's integration marks a direct bridge between institutional Bitcoin custody and morpho-defi lending markets. The feature builds on existing Circle Mint infrastructure. It extends that infrastructure to Bitcoin collateral on both Arc and Ethereum.
Prior options often required separate platforms or wrapped assets with added steps.
Broader market conditions show rising interest in Bitcoin-backed liquidity. Aave governance weighs an 81 percent loan-to-value ratio for Bitcoin. That narrows the price cushion to roughly 4.7 percent.
A separate oracle exploit recently shut down Full Sail protocol on Sui permanently after a $91,000 loss.
Details
Circle's service allows institutions to post cirBTC on Morpho and borrow USDC at rates determined by the lending market. No fixed rates apply. Costs adjust with supply and demand in real time.
The API also supports third-party applications that can open and manage these loans.
"Circle launched Digital Asset-Backed Borrowing."
, Attribution (crypto.news)
Aave's proposed LTV increase reduces borrower cushions from 6.4 percent to 4.7 percent. This change raises liquidation risk if Bitcoin prices move sharply.
The Full Sail shutdown highlights ongoing oracle vulnerabilities that affect capital-efficient yield protocols across chains.
Reaction
Market participants note the contrast between Circle's structured institutional entry and the higher-risk parameters under discussion at Aave. The Morpho integration provides a controlled channel. It keeps collateral and borrowing inside Circle's verified environment.
Social Highlight · @circle · 2026-09-22
Circle integrates Morpho for BTC-backed borrowing. (link)
The launch coincides with Morpho token gains on Coinbase listings. It reflects attention on the underlying lending infrastructure.
Institutions now hold a direct path to circle-usdc liquidity without selling Bitcoin holdings. Aave's LTV decision and ongoing oracle risks remain key variables to monitor in the coming weeks.
