Aave raises core GHO borrow rate as redemption reserves run thin

Aave is making it more expensive to borrow its own stablecoin. The GHO Risk Council has raised the core GHO borrow rate on Ethereum, which The Defiant reports now sits at 5%, and it also lifted the base rate on the Prime market.

The timing is not random. Ethereum’s USDC conversion module, one of the main tools that keeps GHO tied to the dollar, was nearly empty when the change landed.

What changed, and why the math matters

The latest move follows a proposal published on October 2, 2026, by TokenLogic, which serves among the GHO Stewards. That proposal called for lifting the GHO borrow rate on the Ethereum Core market from 4.25% to 4.50% APR. The 5% figure reported by The Defiant sits above that level.

The stated goal of the October 2 proposal was alignment. The Aave Savings Rate, the yield paid to people who stake GHO as sGHO, was set at 4.50%.

With borrowing at 4.25%, a user could take out GHO cheaply and park it in sGHO for a higher return. Closing that 25 basis point gap was meant to end the free lunch. Matching the borrow cost to the savings yield removes the incentive to mint GHO purely to farm sGHO.

The Prime market got the same treatment. Under the TokenLogic proposal, the Ethereum Prime base rate climbs from 2.75% to 3.00%, while the kink rate rises to 4.25%. Prime borrowers still keep a 25 basis point discount at optimal utilization, so the premium venue stays a little cheaper.

The Risk Council carries these changes out under mandates it already holds. It calls a function named updateGhoBorrowRate on specific Aave contracts, and each adjustment must stay within preset per-update limits. That cap means the council can steer rates quickly without a full governance vote, but it cannot yank them around in one dramatic swing.

The reserve problem behind the rate hikes

To understand why Aave keeps nudging rates upward, look at the GHO Stability Modules, or GSMs. These are pools where users can swap other stablecoins for GHO, and back again, at close to a one-to-one rate.

When GHO trades below $1, traders can buy it cheaply on the open market and redeem it through a GSM for a full dollar of USDC or USDT. That arbitrage pulls the price back up. It also drains the module of whatever stablecoin sits on the other side.

That draining is exactly what has happened. The USDC GSM has been depleted, and the USDT GSM holds approximately 22.5M USDT.

GHO traded near $0.999 for much of September and early October 2026. Higher borrow rates attack the problem from the supply side. When borrowing GHO costs more, some borrowers repay their loans. To repay, they need GHO. Some will buy it on the market, which supports the price. Others may route stablecoins through the GSMs to get GHO, which refills the modules. The research describes the strategy as encouraging repayment flows back into the stability modules.

A pattern, not a one-off

This is the third time in roughly as many months that the rate dial has turned. In August 2026, Aave raised the Core borrow rate from 3.75% to 4.25%. Further adjustments followed in September, and then came the October proposal.

GHO is an overcollateralized stablecoin. Users mint it by locking up more value in crypto collateral than the GHO they receive. Its peg depends on a mix of collateral backing, interest rates, and arbitrage tools like the GSMs. Because Aave controls the borrow rate directly, it has a lever that many other stablecoin issuers lack.

What this means for GHO holders and Aave users

For borrowers, the message is simple. Holding a GHO loan on Ethereum Core costs more than it did a few months ago, and the Prime market has moved up as well. Anyone running a leveraged position or a looping strategy built on cheap GHO will need to recheck their numbers.

For sGHO holders, ending the borrow-to-stake loop reduces artificial GHO supply that existed mainly to chase the savings yield.

The empty USDC module is the number to watch. If higher rates drive repayments and the module starts to refill, the strategy is working. If the USDT pool, at approximately 22.5M USDT, keeps shrinking while GHO lingers near $0.999, the council may need to keep pushing rates higher within its per-update limits.