# Aave Risk Steward proposes Base WETH interest-rate curve changes

> A concrete parameter change is now proposed for the Base WETH reserve. If executed, borrowing below the utilization kink would become cheaper and the reserve would operate with a smaller liquidity buffer at optimal utilization.

- URL: https://riadefi.com/on-chain/2026-09-18-aave-v3-base-weth-interest-rate-curve/
- Type: Economic change
- Stage: Proposed
- Evidence: confirmed
- Materiality: watch
- Event date: 2026-09-18
- Version: 1, published 2026-09-18 (first published 2026-09-18)
- Follow-up: 2026-09-25
- Advisor-relevant: no
- Affects: Aave v3 (protocol)

## What happened

TokenLogic, acting within the Aave Risk Steward framework, published a proposal to reduce the WETH Slope1 parameter on Aave v3 Base from 2.50% to 2.30% and increase optimal utilization from 90% to 92%.

## What changed

A concrete parameter change is now proposed for the Base WETH reserve. If executed, borrowing below the utilization kink would become cheaper and the reserve would operate with a smaller liquidity buffer at optimal utilization.

## What did not change

The cached governance record does not establish that the parameters have been executed on-chain. Slope2 is proposed to remain at 8%, and no security incident, asset impairment, or withdrawal halt is reported.

## Confirmed

- The proposed Base WETH Slope1 is 2.30%, down from 2.50%.
- The proposed Base WETH Uoptimal is 92%, up from 90%.
- The record states both changes fit within the Risk Steward's single-action limits.
- The proposal leaves Slope2 unchanged at 8%.

## Still open

- Whether and when the Risk Stewards will execute the parameter update on-chain.
- How utilization, available withdrawal liquidity, borrower behavior, and reserve revenue will respond if the change is executed.

## What it means for an advisor

- Monitor for an execution transaction before treating the new curve as operative.
- Review Base WETH lending and leveraged-staking assumptions if the change executes because borrowing cost and the liquidity buffer at optimal utilization would change.
- Do not infer that the proposed efficiency gain reduces smart-contract, collateral, or liquidity risk.

## Sources

1. [[Risk Stewards] September 2026 - WETH Interest Rate Adjustment on Base](https://governance.aave.com/t/risk-stewards-september-2026-weth-interest-rate-adjustment-on-base/25667) · Aave governance / TokenLogic Risk Steward · 2026-09-18


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Published by Ketju Research on RIADeFi (https://riadefi.com). Educational research for financial professionals; not investment, legal, tax, or compliance advice.