Aave founder and CEO Stani Kulechov has laid out how the upcoming Aave V4 restructures onchain lending through a Hub-and-Spoke architecture designed to balance liquidity access and risk management. The new framework expands lending market options while reducing liquidity coordination costs that arise when capital becomes fragmented across separate venues and users.
Kulechov traced Aave's evolution from ETHLend's peer-to-peer fixed-rate markets to pooled lending, and now toward a modular structure in V4. Under the new design, a Hub stores liquidity while Spokes function as borrowing markets. Each Spoke controls collateral listings and borrowing parameters, while credit lines allow Spokes to draw liquidity held within the Hub.
Market Structure Drives Interaction
According to Kulechov, market structure determines how collateral, borrowing, liquidity, and risk interact across a lending protocol. Aave V4 aims to support multiple lending approaches instead of relying on a single framework. That flexibility becomes critical as lending markets serve different asset classes and risk profiles.
He explained that lending structures sit on a spectrum between risk isolation and capital efficiency. Greater isolation reduces contagion risk but often increases liquidity coordination costs. Capital-efficient structures improve borrower experience and pricing, yet they may aggregate risk into a single market profile.
From V3 to V4: Isolating Risk Without Fragmentation
Kulechov pointed to Aave V3's multi-asset singleton model as an example of efficient liquidity coordination, supporting multiple collateral assets while reducing fragmentation. However, V4 introduces additional tools that allow risk to be separated without fully isolating liquidity.
A key addition is the use of credit lines between segregated markets. Through this model, individual Spokes can draw liquidity from a Hub while remaining subject to predefined exposure limits. Kulechov said this approach allows risk segregation while maintaining access to deep liquidity pools. If an asset becomes unbacked within a Spoke, exposure remains limited by the credit line cap.
Real-World Asset Markets Also Benefit
The structure also supports real-world asset (RWA) markets. Kulechov said separate Spokes could handle equities, private credit, and alternative funds while drawing controlled liquidity from larger crypto-backed markets. This design could extend onchain lending's reach into traditional finance.
Overall, Aave V4's Hub-and-Spoke architecture aims to break the binary trade-off between full isolation and full sharing, offering DeFi lending more granular risk management tools.