Strata Markets’ PT-srUSDe goes live as collateral on Aave, offering up to 15% APY

Fixed income in DeFi has always been the quiet kid at the party. Everyone knows it should be there, but nobody quite figures out how to make it cool. Strata Markets is making a credible attempt: its Principal Token, PT-srUSDe, is now live as collateral on Aave’s V3 Core platform, letting users borrow stablecoins against locked-in fixed yields of up to 15% APY.

How the structure actually works

Strata Markets split Ethena’s sUSDe yield into two distinct tranches. The first tranche, srUSDe, is the senior layer. It captures a fixed yield, shielded from the worst of the volatility. The second, jrUSDe, is the junior tranche. It absorbs more risk but targets higher returns.

Investors can mint PT-srUSDe tokens through Pendle’s infrastructure, which facilitates the Principal Token and Yield Token markets for srUSDe. These PT tokens represent your claim on the fixed yield until a set maturity date. You lock in a rate, and when the token matures, you collect.

The srUSDe market cap sits around $61 million. Now, here’s where the Aave listing changes the game. Previously, holding PT-srUSDe meant your capital was essentially parked until maturity. With collateral status on Aave V3 Core, users can now deposit those tokens and borrow stablecoins against them. Your fixed yield keeps accruing in the background while your borrowed capital goes to work elsewhere.

The Aave integration timeline

Governance proposals for onboarding PT-srUSDe tokens to Aave V3 Core began circulating in December 2025, with the initial maturities targeting January 2026. The structure was deliberately conservative at launch: borrowing was disabled, and the tokens could only be used as collateral.

By the time April 2026 maturity pools rolled around, supplies on Aave had reached approximately $185 million before transitioning to newer pools. Pendle’s role as the marketplace for these tokens ensures that liquidity pools extend at least through October 2026.

The effective APYs referenced in the ecosystem reach up to 15% when users deploy optimal strategies. That likely involves combining the fixed yield from PT-srUSDe with the borrowing power on Aave. A simple hold would yield less, but the collateral functionality is precisely what makes more aggressive strategies possible.

Why this matters for DeFi investors

PT-srUSDe on Aave represents a fixed-rate instrument that doubles as productive collateral on the largest lending protocol in DeFi.

There are risks, naturally. The fixed yield on srUSDe is only as reliable as the underlying Ethena sUSDe mechanics. If Ethena’s delta-neutral strategy faces unexpected pressure, or if sUSDe funding rates turn negative for extended periods, the junior tranche absorbs losses first, but sustained stress could theoretically affect the senior tranche too. Smart contract risk across three protocols (Ethena, Strata, Aave) compounds the surface area for potential exploits.

Liquidation dynamics also deserve attention. If the value of PT-srUSDe relative to borrowed stablecoins shifts unfavorably, particularly near maturity when token pricing can behave differently, leveraged positions could face margin calls. Users running looped strategies at 15% APY should understand that the leverage cuts both ways.

For investors weighing whether to participate, the key metric to monitor is the spread between PT-srUSDe’s fixed yield and Aave’s stablecoin borrowing cost. As long as that gap remains wide, the carry trade stays attractive. The moment it narrows, the strategy’s edge evaporates, and the remaining risk becomes harder to justify.

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