Aave has launched its V4 lending upgrade on the Ethereum mainnet, bringing a new “hub-and-spoke” architecture to DeFi. The rollout follows almost a year of audits, testnets, and governance reviews focused on risk and architecture.
A governance proposal called ARFC: Aave V4 Activation on Ethereum Mainnet cleared the DAO’s off-chain and on-chain voting stages with strong support. The proposal described V4 as a “security‑by‑design” release and said the DAO would start with conservative parameters and a limited set of markets.
How the New Hub-and-Spoke Model Works
In earlier versions, each Aave market held its own liquidity pool. In V4, liquidity now sits in central “Liquidity Hubs,” while separate “Spokes” plug into those hubs. The Liquidity Hub stores assets, tracks protocol-wide accounting, and enforces global risk caps.
Aave’s documentation explains that the Hub “consolidates protocol‑wide liquidity and accounting, while Spokes implement modular borrowing with isolated risk.” Each Spoke defines which assets it supports, how interest rates behave, and what collateral rules apply, but it draws liquidity from the shared Hub through a credit line.
Risk contributors like Chaos Labs and LlamaRisk say the design “aims to pool liquidity in a central hub while isolating risk at the spoke level to compartmentalize collateral and liquidation behavior.” This structure should reduce liquidity fragmentation and still limit damage if one market faces stress.
New Features for Borrowers and Institutions
The V4 launch adds support for more specialized markets, including real‑world asset collateral, fixed‑rate borrowing, and institutional credit lines. Aave’s activation post notes that the modular design “makes it easier to support new risk profiles and enable innovation without fragmenting liquidity.”
Each network will run at least one Liquidity Hub, and the DAO can spin up different hubs for conservative stablecoin liquidity or higher‑risk strategies. That flexibility is meant to help Aave serve retail DeFi users and larger firms that need clearer risk separation.
Aave founder Stani Kulechov said the protocol wants V4 to act as a “unified liquidity layer” where liquidity stays shared while risk stays modular. How governance steers that layer over the next year will decide whether V4 becomes the main base for the next wave of DeFi lending.
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