About 67.4 million PT-AUSD-8OCT2026 tokens — roughly $67 million — sat as collateral on Aave V3's Monad market as of Oct. 2, according to Aave risk adviser LlamaRisk. Pendle's Oct. 8 principal-token maturity is now five days away, and the protocols' first large-scale rollover test begins.

The October collateral position expanded faster than its caps. Aave launched the market with a 20 million-token supply ceiling. Users filled it by late August, prompting LlamaRisk to recommend doubling the cap to 40 million; that limit was fully utilized within days, leading the risk steward to recommend 80 million. By Oct. 2, the market held 67.4 million PT.

What does the rollover mechanism actually do?

Pendle deployed a Dec. 17 AUSD principal-token market last month, and TokenLogic has proposed listing it on Aave. The structure lets borrowers redeploy their collateral into the later maturity without unwinding their lending positions. "Fixed yield becomes collateral. Collateral creates credit. Then the next maturity keeps the cycle moving," DeFi researcher Andree said, describing the relationship between the protocols.

TokenLogic proposed another 20 million initial cap for PT-AUSD-17DEC2026. LlamaRisk recommended 30 million. LlamaRisk explicitly described the December PT as the rollover destination and said as much as 67.4 million of Aave collateral could migrate into it.

Is the December market ready to absorb that volume?

As of Oct. 2, the December Pendle pool had $1.61 million of liquidity, 904,717 PT outstanding and $44,000 of trading volume since deployment, per LlamaRisk. Pendle users can mint additional PT by splitting yield-bearing AUSD positions, meaning pool liquidity does not impose a hard ceiling on collateral creation. Large-scale migration can still affect execution prices and the fixed return available to buyers.

How tight is borrower economics?

LlamaRisk put the December PT's implied yield at 5.64% on Oct. 2. A temporary one-percentage-point campaign incentive lifted the effective rate to 6.64%. That exceeded borrowing rates of 4.28% for mUSD, 4.64% for GHO, 5.10% for USDT0 and 6.09% for USDC at the snapshot, leaving room for positive carry before transaction costs and price impact. It remained below the 6.82% borrowing rate on USDe.

Spreads can shift quickly. Aave borrowing rates vary with utilization, while PT yields move as traders buy or sell the instrument. The incentive boosting December returns is also temporary.

What does the borrower book look like?

The October market also shows much of the supplied PT has been used actively rather than left idle. In an Aug. 31 assessment, LlamaRisk found that the 18 largest suppliers all carried debt, primarily in USDC, with additional borrowing in GHO, USDe and USDT0. Their median health factor was 1.02 at the time. The tight margin reflected a structure in which both collateral and debt are dollar-denominated, allowing borrowers to run high loan-to-value positions with less directional price risk than crypto-backed leverage.

Maturity does not itself trigger liquidation. Borrowers can redeem PT for AUSD after expiry, repay loans, or post other collateral. But a user with debt against the October PT cannot necessarily withdraw the collateral until the position remains adequately covered. Rolling directly into December PT offers another route to keeping the borrowing position intact.

What's driving broader AUSD demand on Monad?

Active AUSD loans on Aave jumped 113% to $8.7 million from $4.1 million in 15 days, while user deposits more than doubled to $11.2 million, according to an Oct. 3 TokenLogic post. The $8.7 million of active AUSD loans is separate from the stablecoin debt raised specifically against PT-AUSD, but both point to growing demand for AUSD-linked credit on Monad.

What happens next?

The Oct. 8 expiry will provide the first large-scale test of whether the fixed-yield-to-collateral cycle can continue across maturities. If December PT begins filling its initial cap as rapidly as the October version did, Aave's risk stewards may again face pressure to raise the limit. Their willingness to do so will depend on Pendle liquidity, borrower health, and whether the new market develops enough depth to support tens of millions of dollars of collateral.