AlphaFi, a decentralized finance protocol built on Sui, is winding down operations after an oracle configuration error the ALPHA token produced undercollateralized loans on its AlphaLend lending market.

Lending markets depend on external price feeds to value collateral in real time and enforce the thresholds that keep every loan adequately backed. The misconfigured ALPHA oracle distorted the collateral calculations used by the lending market, generating bad debt on AlphaLend. Once the faulty valuation left loans whose collateral no longer adequately covered their debt, the protocol was left with a balance-sheet shortfall. The deficit was covered in full with support from the Sui Foundation, meaning depositor balances were protected from losses, as noted in a post on X.

AlphaFi has moved into maintenance mode. New deposits and borrowing are disabled, while repayments and withdrawals remain open so users can close positions and pull assets out of the protocol. For borrowers, closing out fully means repaying outstanding debt before reclaiming collateral.

AlphaLend Crossed $100 Million Weeks Earlier

The shutdown arrives only weeks after AlphaLend's supplied assets climbed beyond $100 million. Those markets spanned SUI, stablecoins and Bitcoin-related assets, while borrowing markets also supported Sui-native tokens such as WAL and DEEP.

Across its wider ecosystem, AlphaFi had previously reached $160 million in total value, including $86 million on AlphaLend, $46 million in stSUI and $28 million across yield vaults. Supplied-asset totals and value locked are the benchmarks the DeFi industry uses to size a protocol, and AlphaFi paired that footprint with more than 50,000 reported monthly active users across AlphaFi and AlphaLend during its growth period. The reversal — from a nine-figure lending market to a full stop on new activity within weeks — underscores how operational faults, not only market moves, can halt a protocol.

The oracle failure affected the pricing used to determine whether AlphaLend positions remained sufficiently collateralized. No new lending activity is being accepted while the wind-down proceeds.

Withdrawals Stay Open as Positions Unwind

Users can continue withdrawing assets as AlphaFi unwinds its remaining positions. Halting new activity while leaving exits open keeps the remaining flow one-directional: users repay and withdraw, and no new positions enter the markets. Slush users with exposure through AlphaFi strategies were advised to exit affected positions rather than leave funds in products being discontinued.

The closure follows separate security failures across the Sui DeFi sector this year. Scallop lost roughly 150,000 SUI in April after an attacker targeted a deprecated contract, and later that month Aftermath Finance paused its protocol following a $1.1 million perpetuals exploit.

AlphaFi's incident followed a different failure mechanism: the losses stemmed from incorrect oracle configuration and the resulting undercollateralized loans, rather than a reported drain of protocol wallets. Pricing-feed errors form a risk category of their own in DeFi lending, since contracts can execute exactly as written and still generate bad debt when the values feeding them are wrong.

AlphaLend is no longer accepting deposits or new loans. Repayments and withdrawals remain active as AlphaFi completes the wind-down, and the bad debt created by the ALPHA pricing error has been covered in full.