# Summerstone (https://summerstone.xyz/index.md) Expanding onchain markets. Summerstone builds infrastructure for onchain markets with production systems across borrowing, yield, liquidity, and research. ## Primary pages - [Borrowing](https://summerstone.xyz/borrowing.md): Automated borrowing for Liquity-based protocols. - [Yield](https://summerstone.xyz/yield.md): Curated yield strategies and vault frameworks. - [Liquidity](https://summerstone.xyz/liquidity.md): Market operations and execution tooling. - [Research](https://summerstone.xyz/research.md): Long-form publications and market analysis. - [Blog](https://summerstone.xyz/blog.md): Announcements and ecosystem updates. - [Documentation](https://summerstone.xyz/docs.md): Product documentation and guides. # About Summerstone (https://summerstone.xyz/about.md) We excel at the intersection of onchain markets, realtime data and quantitative and agentic algorithms. ## Vision and mission Summerstone is focused on expanding fair, efficient, and predictable onchain markets for people and businesses worldwide. ## Values - Reliability: production-first engineering and operational rigor. - Security: defense-in-depth and explicit risk management. - Focus: solve a few hard problems exceptionally well. Related pages: [Borrowing](https://summerstone.xyz/borrowing.md), [Research](https://summerstone.xyz/research.md), [Docs](https://summerstone.xyz/docs.md) # Effortlessly optimized borrowing (https://summerstone.xyz/borrowing.md) Summerstone is the leading provider of set-and-forget interest rates on Liquity-based borrowing markets. ## Product overview Automated Borrowing automates interest-rate adjustments for collateral-backed loans while preserving user custody. ## Supported protocols - Liquity V2 (BOLD, Ethereum): [docs](https://summerstone.xyz/docs/borrowing/supported-protocols/bold-and-liquity-v2.md) - Nerite (USND, Arbitrum One): [docs](https://summerstone.xyz/docs/borrowing/supported-protocols/usnd-and-nerite.md) - Soneta (ONE, Sonic Mainnet): [docs](https://summerstone.xyz/docs/borrowing/supported-protocols/one-and-soneta.md) - Mustang (MUST, Saga EVM): [docs](https://summerstone.xyz/docs/borrowing/supported-protocols/must-and-mustang.md) ## Guarantees - Self-custody delegation. - Protocol-enforced fee/adjustment constraints. - Gas costs for adjustment execution covered by Summerstone. # Summerstone Documentation (https://summerstone.xyz/docs.md) # Overview (https://summerstone.xyz/docs/borrowing.md) Summerstone’s rate automation solution is designed specifically for users who value: * **Self-custody:** Retain full control of your funds at all times. * **Efficiency:** Automated adjustments eliminate manual work, reducing stress and costs. * **Transparency:** All actions and parameters are fully verifiable directly onchain. Chat with our docs using an LLM using [this LLM-friendly text file](https://summerstone.xyz/llms-full.txt) of the full documentation. ## Security and Transparency All parameters are verifiable onchain, providing absolute transparency and security: * **Fixed Service Fee:** A maximum fee of 0.3% annually. * **Adjustment Frequency:** Normal adjustments no more frequently than once per week. * **Immutable Guarantees:** Parameters enforced by smart contracts. ## How the Automated Adjustment Process Works The following diagram illustrates how Summerstone’s automated interest rate strategies interact with loans and the Liquity-V2-based protocols: ### Explanation of the Diagram: * **Delegation:** You delegate authority to adjust your loan’s interest rate (no fund custody involved). * **Monitoring:** Our algorithm constantly evaluates market conditions, including debt positions, redemption risks, and gas conditions. * **Adjustment Calculation:** The solver computes the optimal interest rate adjustments based on your preset risk strategy. * **Execution:** Adjustments are securely executed directly on the Liquity V2 protocol, reflected transparently onchain. ## Getting Started: 1. Open your loan settings in a supported frontend of your chosen protocol. 2. Delegate interest rate automation to our verified address. Check our [supported protocols](/docs/borrowing/supported-protocols). 3. Confirm the transaction - your loans are now fully automated. # Frequently Asked Questions (FAQs) (https://summerstone.xyz/docs/borrowing/frequently-asked-questions.md) ## What exactly does Summerstone do? Summerstone provides automated interest rate adjustments for your Liquity V2-based loans. By continuously monitoring market conditions, our system optimally adjusts your interest rate to keep borrowing costs low, proactively minimize redemption risk, and eliminate the hassle of manual adjustments. *** ## How do automated interest rate adjustments work? Our system monitors key metrics continuously, including: * Redemption risk and debt positions * Market price fluctuations * Network gas conditions * Liquity protocol status and events Based on these metrics, our algorithms determine precisely when and how to adjust your loan's interest rate, optimizing your borrowing efficiency. *** ## How much does Summerstone cost? We charge a straightforward 0.3% annual service fee based on your total loan amount, enforced transparently by the protocol. For most users, these costs are offset by: * Reduced gas expenses from eliminating manual adjustments * Lower average interest rates * Reduced risk of redemption penalties You can calculate your exact potential savings using our [Savings Calculator](/docs/borrowing/savings-calculator). *** ## Is delegating interest rate adjustments secure? Yes. Delegation through Liquity V2 protocols is inherently safe and limited: * Delegates / batch managers **only** have the ability to adjust interest rates. * Delegates / batch managers **cannot** access or transfer your funds or modify other loan parameters. * Delegation permissions and boundaries are verifiable directly onchain. *** ## Can Summerstone guarantee protection against redemptions? While our automated system significantly reduces the likelihood of redemption by proactively adjusting rates, we cannot guarantee complete protection due to inherent market volatility and liquidity factors. Please review our comprehensive [Terms of Service](/docs/borrowing/terms-of-service) to understand these risks fully. *** ## Which frontends can I use? Liquity does not run its own frontend. You can use any frontend that supports interest rate delegation for Liquity V2 protocols. You can find independent frontends [here](https://www.liquity.org/frontend-v2) or just head to [liquity.app](https://liquity.app/). *** ## How frequently are interest rates adjusted? Adjustments typically happen at most once per week under normal conditions. During high-risk periods, adjustments may occur more frequently as needed, within the limits enforced by the Liquity protocol. *** ## Do rates differ based on collateral types? Yes. Interest rates are optimized individually for each collateral type to manage risk effectively. Each collateral type has its own optimal range for safe borrowing. *** ## Can I stop using Summerstone at any time? Absolutely. You retain full control and can revoke interest rate delegation at any moment directly from your wallet. *** ## Which Liquity V2 forks and stablecoins are supported? We support multiple popular Liquity V2 forks and stablecoins used actively by the community. You can find the full list of supported protocols in our [Supported Protocols](/docs/borrowing/supported-protocols) section. # Savings Calculator (https://summerstone.xyz/docs/borrowing/savings-calculator.md) Our Return on Investment (ROI) calculator helps you determine how much you can save by using Summerstone's automated interest rate strategies. Compare the costs of manual adjustments to our automated solution and see the benefits over time. ## How the Calculator Works The calculator compares two approaches to interest rate adjustments: ### Manual Costs When adjusting interest rates manually, you incur two types of costs: 1. **Gas Costs:** The ETH transaction fees paid each time you adjust your rate 2. **Interest Rate Loss:** The additional interest costs from suboptimal rate adjustments ### Automated Borrowing Benefits With Summerstone's automated borrowing, you pay a small fee but gain several benefits: 1. **Optimal Rate Adjustments:** Our solvers monitor the market continuously 2. **Zero Gas Costs:** We handle all transaction expenses 3. **MEV Protection:** Our specialized infrastructure protects your transactions ## Customization Options You can adjust several parameters to match your specific situation: * **Loan Size:** The principal amount of your loan (affects both service fees and potential savings) * **Adjustment Frequency:** How often you would typically adjust rates if adjusting manually * **Gas Price:** Expected network conditions and transaction costs **Advanced options** allow you to fine-tune: * **Gas Units Per Adjustment:** Complexity of your adjustment transactions * **ETH Price:** Current market value of Ethereum * **Interest Rate Optimization:** Estimated savings from optimal rate adjustments * **Calculation Timeframe:** View results over 1, 2, or 5 years ## Understanding the Chart The chart visualizes the comparison between costs and benefits over time: * **Red Bars (Below Axis):** Service fees (costs) * **Green Bars (Above Axis):** Gas cost savings * **Blue Bars (Above Axis):** Interest savings from optimal rate adjustments * **White Line:** Net value (when this crosses above zero, you achieve positive ROI) This visualization makes it easy to see exactly when automated borrowing starts providing positive returns on your investment. # Supported Protocols (https://summerstone.xyz/docs/borrowing/supported-protocols.md) {/* */} {/* */} # MUST and Mustang (https://summerstone.xyz/docs/borrowing/supported-protocols/_must-and-mustang.md) MUST is a USD-pegged stablecoin issued by the Mustang protocol on Saga EVM. | Property | Value | | --------------------------- | -------------------------------------------------------------------- | | Protocol | Mustang ([https://must.finance](https://must.finance)) | | Frontend | [https://app.must.finance](https://app.must.finance) | | Stablecoin Symbol | MUST | | Blockchain | Saga EVM | | Chain ID | `5464` | | Stablecoin Contract Address | `0xa8b56ce258a7f55327bde886b0e947ee059ca434` | | Blockchain Explorer | [https://sagaevm.sagaexplorer.io/](https://sagaevm.sagaexplorer.io/) | The information provided on this page is for informational purposes only and does not constitute financial, investment, or trading advice. Please review our [Terms of Service](/docs/borrowing/terms-of-service) before using any services described here. ## Active Strategies # ONE and Soneta (https://summerstone.xyz/docs/borrowing/supported-protocols/_one-and-soneta.md) ONE is a USD-pegged stablecoin issued by the Soneta protocol on Sonic. | Property | Value | | --------------------------- | ------------------------------------------------------------ | | Protocol | Soneta ([https://soneta.xyz](https://soneta.xyz)) | | Frontend | [https://www.soneta.xyz/lobby](https://www.soneta.xyz/lobby) | | Stablecoin Symbol | ONE | | Blockchain | Sonic | | Chain ID | `146` | | Stablecoin Contract Address | 0x8ed344E89527C6cE382fd1E23B4D6D4c2865b6A9 | | Blockchain Explorer | [https://sonicscan.org](https://sonicscan.org) | The information provided on this page is for informational purposes only and does not constitute financial, investment, or trading advice. Please review our [Terms of Service](/docs/borrowing/terms-of-service) before using any services described here. ## Active Strategies # BOLD and Liquity V2 (https://summerstone.xyz/docs/borrowing/supported-protocols/bold-and-liquity-v2.md) BOLD is a USD-pegged stablecoin issued by the Liquity V2 protocol on Ethereum Mainnet. | Property | Value | | --------------------------- | -------------------------------------------------------------------------- | | Protocol | Liquity V2 ([https://liquity.org](https://liquity.org)) | | Frontend | [https://liquity.app](https://liquity.app) | | Stablecoin Symbol | BOLD | | Blockchain | Ethereum Mainnet | | Chain ID | `1` | | Stablecoin Contract Address | `0x6440f144b7e50D6a8439336510312d2F54beB01D` | | Blockchain Explorer | [https://etherscan.io](https://etherscan.io) | | Protocol Explorer | [https://dune.com/liquity/liquity-v2](https://dune.com/liquity/liquity-v2) | The information provided on this page is for informational purposes only and does not constitute financial, investment, or trading advice. Please review our [Terms of Service](/docs/borrowing/terms-of-service) before using any services described here. ## Active Strategies # USND and Nerite (https://summerstone.xyz/docs/borrowing/supported-protocols/usnd-and-nerite.md) USND is a USD-pegged stablecoin issued by the Nerite protocol on Arbitrum One. | Property | Value | | --------------------------- | ------------------------------------------------- | | Protocol | Nerite ([https://nerite.org](https://nerite.org)) | | Frontend | [https://app.nerite.org](https://app.nerite.org) | | Stablecoin Symbol | USND | | Blockchain | Arbitrum One | | Chain ID | `42161` | | Stablecoin Contract Address | `0x4ecf61a6c2fab8a047ceb3b3b263b401763e9d49` | | Blockchain Explorer | [https://arbiscan.io](https://arbiscan.io) | The information provided on this page is for informational purposes only and does not constitute financial, investment, or trading advice. Please review our [Terms of Service](/docs/borrowing/terms-of-service) before using any services described here. ## Active Strategies # Terms of Service (https://summerstone.xyz/docs/borrowing/terms-of-service.md) These Terms of Service (the "Terms") explain what happens when you appoint us as your **non‑custodial rate automation provider** (the "Service"). You do that by setting our delegate address for your loan(s) on one or more independent lending protocols ("Core Protocols"). If you do not agree to these Terms, do not set that delegation. ## 1. Who may use the Service * You are at least 18 years old and legally able to make contracts. * You follow the laws of your country. If local rules ban blockchain borrowing tools, do not use the Service. ## 2. What we do - and **don't** do * **Delegate only.** Using your own wallet, you give our address limited authority to automate the interest‑rate settings of your loan. Nothing more. * **No custody.** We never hold your assets or private keys. The Core Protocols still hold collateral and debt. You can revoke our delegation at any time with your wallet. * **No control over Core Protocols.** We did not build them, cannot fix them, and cannot stop unexpected behavior. * **No guarantees or advice.** We do not promise to lower your rate, prevent liquidation, or achieve any outcome. Nothing we say is financial, legal, tax, or trading advice. * **Off‑chain actions.** After delegation, our off-chain systems may act on your behalf within the constraints defined. We are **not obliged** to act, and any action may be skipped, delayed, or fail. * **Not a regulated entity.** We are not a bank, broker, exchange, or money‑service business, and we are not regulated as one. ## 3. Big risks you accept 1. **Protocol bugs or hacks.** Core Protocols can fail or be exploited; our off‑chain systems may also malfunction. 2. **Interest‑rate swings.** Rates can spike suddenly, and our solvers might not react in time - or at all. 3. **Liquidations.** Falling collateral value can trigger automatic liquidations, irrespective of your interest rate. 4. **Network congestion.** High gas fees or chain delays can stop us from acting when needed. 5. **Regulatory changes.** Laws can change and make it hard or illegal for you to repay or keep using blockchain tools. ## 4. Your responsibilities * **Maintain collateral.** You are responsible for monitoring collateral levels and adding more if needed. * **Stay legal.** Do not use the Service for money laundering, sanctions evasion, or any crime. * **Understand the rules.** Read how our delegate operates before you enable it. * **Indemnity.** If someone sues us because of something you did, you will cover our costs (including lawyers' fees). ## 5. No promises ("As Is") The Service is provided **"as is" and "as available."** We make **no warranty** - not for uptime, accuracy, security, or any result. We may miss triggers, execute late, or fail completely. You accept that risk. ## 6. Limits of liability To the fullest extent allowed by law: * We are **not** responsible for any indirect, special, or consequential loss; lost profits; lost data; or loss of goodwill. * If we are found liable anyway, our total liability is capped at **US $1.00**. ## 7. Stopping or changing the Service We may upgrade, pause, or shut down our off‑chain systems or resign our delegate address without notice. You can revoke delegation at any time. ## 8. Disputes * **Informal resolution first.** Contact us; we will try to resolve any issue in good faith. * **Arbitration.** If we cannot settle it informally within 30 days, any dispute will be resolved individually and confidentially by binding arbitration under widely accepted international rules. The arbitrator's decision is final and enforceable. * **No class actions.** You and we may bring claims only on our own behalf, not as part of a class, collective, or representative action. ## 9. Updates to these Terms We may update these Terms by publishing a new version at any time. Using the Service after the update means you accept the new Terms. **By delegating interest rate automation to our address, you confirm that you have read, understood, and agreed to these Terms, and that you accept all risks described above.** # Why Automate Your Interest Rate? (https://summerstone.xyz/docs/borrowing/why-automate-your-interest-rate.md) Automating interest rate adjustments maximizes your capital efficiency and significantly reduces redemption risks and costs: * **Zero Gas Fees:** All adjustment-related gas costs are covered by us. * **Optimal Rates:** Real-time market monitoring ensures adjustments are executed precisely and timely. * **Proactive Adjustments:** Risk of redemptions is actively minimized through proactive adjustments. ## Manual vs. Automated The following diagram compares Summerstone's automated approach to manual adjustments: ## Manual Adjustments: Hidden Costs and Risks Adjusting your own interest rates may seem straightforward, but often involves significant unseen costs: * **Gas Fees:** Frequent manual adjustments become costly quickly. * **Redemption Risk:** Manual updates are often too late or suboptimal, increasing the risk of loan redemption. * **Emotional Cost:** Constant anxiety and stressful emergency adjustments during market volatility. * **Capital Inefficiency:** Overpaying interest due to delayed or missed adjustments. ## **Why Summerstone Rate Automation?** Summerstone's automated interest rate strategies eliminate the burden of costs associated with manual adjustments, maximizing your capital efficiency and significantly reducing redemption risks: * **Significant savings:** Automatically optimized interest rates can significantly lower your borrowing costs compared to manual adjustments. * **Reduced gas costs to zero:** Automated adjustments save significant gas costs compared to frequent manual adjustments. * **Optimized Interest Rates:** Our continuous monitoring and real-time adjustments lead to lower average interest rates. Manual updates are often too late or suboptimal, increasing costs and the risk of loan redemption. * **Proactive risk reduction:** Our algorithm monitors market conditions around the clock, actively reducing user’s redemption risk. * **User remains in control:** Delegate only the automation of your interest rate. Summerstone can never take custody or control of your funds. * **Trusted expertise:** As long-term partners of Liquity AG, we leverage deep expertise in blockchain analytics and operational excellence. # Summerstone Brand Kit (https://summerstone.xyz/docs/brand-kit.md) This section includes logos, wordmarks, colors and fonts. ## Brand Colors * **Carrot orange**: #FA970B * **Eerie black**: #222020 * **Corn silk**: #FEF6D5 ## Fonts * **Titles**: Funnel Display * **Content**: Funnel Sans ## Download our Brand Kit Download the [Summerstone Brand Kit](/files/Summerstone_Brand_Kit.zip). # Blog (https://summerstone.xyz/blog.md) Announcements and updates from the Summerstone team. ## Posts - [Summerstone extends rate automation to Mustang](https://summerstone.xyz/blog/summerstone-and-mustang.md): Summerstone is extending rate automation services to Saga's native stablecoin MUST. - [Summerstone partners with Nerite](https://summerstone.xyz/blog/summerstone-and-nerite.md): As part of our wider commitment to the Liquity ecosystem, Summerstone is partnering with Nerite to make the future of borrowing a reality on Arbitrum One. # Summerstone extends rate automation to Mustang (https://summerstone.xyz/blog/summerstone-and-mustang.md) Summerstone is extending rate automation services to Saga's native stablecoin MUST. ## Mustang Finance & MUST, built for Saga Mustang Finance is bringing [Liquity V2](https://liquity.org/)-based borrowing to Saga EVM. Through the CDP, Saga users can mint the stablecoin MUST, with a rock-solid USD peg. The MUST stablecoin can be minted by depositing one of seven types of collateral: WETH, yETH, tBTC, wSAGA, wstAtom, KING and yUSD. Once deposited, users can open a trove setting their own interest rates without relying on governance or on any specific algorithm.
## How can Saga Users Benefit from Summerstone Summerstone aligns with user's, reducing their overall borrowing costs through calculating precise, reliable rates. We do so by: → **24/7 monitoring:** Our solvers monitor all troves, system parameters, market conditions and outside debt to have a holistic view of the system's status. → **Optimized rate tuning**: We spread out the amount of changes and keep borrowing costs as low as possible while protecting against redemptions, the automatic peg-stabilization mechanism used by Mustang Finance. At any point, our solvers are prepared to trigger rate adjustments of our automated troves.
## Get started using Summerstone interest rate strategies on Mustang 1. Head to [app.must.finance](https://apps.must.finance/) and connect your wallet. 2. Pick your collateral, and amount to borrow. 3. Set your interest rate as "Delegated" and pick the Strategy Delegate Address of your chosen collateral from the [Summerstone Docs](https://summerstone.xyz/docs/borrowing/supported-protocols/must-and-mustang). Alternatively, you can try out the [Summerstone Wizard 🧙‍♂️](https://ir-wizard.summerstone.xyz/): a new interface to delegate rate automation of your Liquity-based loans. All in one place. We currently support Liquity, Mustang Finance, Nerite, Soneta. Read more about Mustang on [docs.must.finance](https://docs.must.finance/) # Summerstone partners with Nerite (https://summerstone.xyz/blog/summerstone-and-nerite.md) As part of our wider commitment to the Liquity ecosystem, Summerstone is partnering with Nerite to make the future of borrowing a reality on Arbitrum One. ## Nerite & USND, built specifically for Arbitrum [Nerite](https://nerite.org/) is a [Liquity V2](https://liquity.org/)-based borrowing protocol. It inherits the protocol’s immutability while letting users mint USND, Nerite’s native USD-pegged stablecoin. In Nerite, borrowers can establish their own interest rates, according to what they are willing to pay without relying on governance or a protocol-set algorithm rates. ### Nerite expands Liquity’s model → **Broader collateral:** In addition to ETH, wstETH, and rETH, Nerite accepts rsETH, weETH, ARB, COMP, and tBTC. → **Streamable stablecoin**: USND, is issued as a [Superfluid super token](https://docs.superfluid.org/docs/concepts/superfluid#super-tokens), allowing value to flow continuously rather than by discrete transfers. → **Lower entry:** Minimum debt per borrow on Nerite is 500 USND, one quarter the Liquity V2 baseline, opening the door to smaller positions.
## Powering market operations for Nerite Market operations becomes increasingly important to guarantee the stability of USD-pegged tokens, especially when backed by diverse sets of liquid staking derivatives and non ETH assets. Summerstone will continuously map Nerite’s market conditions. Powered by real time data, Summerstone’s interest rate solvers and liquidation engine are prepared to trigger interest rate adjustments and precise liquidations across every supported collateral, adapting to each specific liquidity profile and volatility. As with Liquity V2, Nerite borrowers will be able to delegate their interest rate automation to Summerstone. ### How this benefits users → **Reliable rates.** Interest bands tuned for market depth rather than rough averages with reliable data. → **Predictable peg behaviour**, creating the basis for a sustainable market. → **Trusted Manager.** Users can delegate changes to their interest rates to a long-standing, reputable member of the Liquity and Nerite ecosystems.
## Get Started Nerite opens the door to user-set interest rates on Arbitrum. Summerstone supplies rate engineering, and data monitoring. By working side-by-side, we aim to set a new standard for self-custodial borrowing on Arbiturm. Get started on [nerite.org](https://nerite.org/) To get in touch, [reach out to us](https://graphops.notion.site/32e2931a55f7814bbea2edfe9481579d?pvs=105). # Research (https://summerstone.xyz/research.md) Research and publications from the Summerstone team. ## Posts - [Pendle as Yield Infrastructure](https://summerstone.xyz/research/pendle.md): How the venue works, and how lending protocols shape its markets. - [Morpho curators: market structure in 2025](https://summerstone.xyz/research/morpho-curators-market-structure-january-2026.md): A look into liquidity, curator consolidation, their supply, and the stablecoin landscape in Morpho. - [Liquity V2 Batch Managers: ICP-Based vs Summerstone](https://summerstone.xyz/research/liquity-v2-rate-managers.md): This article outlines how ICP-based batch managers differ from Summerstone's approach. # Pendle as Yield Infrastructure (https://summerstone.xyz/research/pendle.md) How the venue works, and how lending protocols shape its markets. ## Summary In 2025, Pendle shifted from a general yield-tokenization protocol into infrastructure for locking stablecoin yields at fixed rates. ETH derivatives, once Pendle's core use case, declined to just 2.9% of open interest. Activity consolidated around a narrow set of stablecoin instruments where implied rates trade persistently at 8–20%, well above ETH derivative yields of 3–7%. Users overwhelmingly buy and hold. 85.6% of capital stays until maturity, 98.9% of wallets never sell, and only 7.4% of expired capital rolls into the next expiry. Pendle operates as a one-way funding lock rather than a trading venue. But this capital doesn't arrive directly. 73.8% of Pendle's external PT open interest flows through lending protocol intermediaries: Aave V3 alone holds 54.7% across 26 vault contracts. The dominant strategy is looping yield-bearing stablecoins: deposit into Pendle, post PT as collateral on a lending venue, borrow stablecoins, re-enter Pendle. This makes Pendle's scale inseparable from the lending venues that consume its output, and inflates headline open interest. ### Key findings: * $538M in active PT open interest, with 96.1% in stablecoins. * About 66-day weighted average duration: the average dollar on Pendle is exposed to rate moves for roughly two months. Pendle is short-duration yield infrastructure, not a term funding venue. * 93% of dollar-denominated OI in holding-behavior markets: positions are sticky, not churning. * 54.7% of all PT units are held by Aave V3: Pendle is an intermediary-consumed infrastructure and integrated directly with lending venues, not a direct-to-user venue. * We estimate 10–31% of OI is leverage-generated rather than independently committed capital. * Only 7.4% of expired capital rolls into the next expiry. When PT positions expire without rollover, the associated lending positions (loops, collateral commitments) must also unwind, creating periodic deleveraging pressure across the lending venues that warehouse PT. * 66.1% of outstanding YT sits with addresses that only ever minted (PT-motivated), while just 15.5% represents independent yield-long demand. The yield side of Pendle is largely a byproduct of principal token manufacturing, not the primary product. ## What Pendle Is Pendle is infrastructure for separating, pricing, and transferring future yield. It tokenizes yield that originates elsewhere. Pendle takes yield-bearing assets and splits them into their principal and yield components, each tradeable independently through a dedicated AMM. Through the venue participants can lock fixed rates, trade yield exposure, or hold positions until maturity. The mechanism begins with [Standardized Yield (SY)](https://docs.pendle.finance/pendle-v2/ProtocolMechanics/YieldTokenization/SY), a token wrapper conforming to [EIP-5115](https://eips.ethereum.org/EIPS/eip-5115) that provides a common interface for any yield-bearing asset and standardizes how Pendle interacts with the full range of yield-bearing assets across DeFi. When a token is deposited into Pendle, it is first wrapped into its SY representation (e.g., sUSDe becomes SY-sUSDe). SY is then split into two tokens in equal quantities: a Principal Token (PT) and a Yield Token (YT). The split is atomic: 1 SY always produces 1 PT and 1 YT, and the [two cannot be created independently.](https://docs.pendle.finance/pendle-v2/Developers/HighLevelArchitecture) * A [Principal Token](https://docs.pendle.finance/pendle-v2/ProtocolMechanics/YieldTokenization/PT) is a claim on the underlying principal at maturity. PT trades at a discount to its underlying asset, and that discount narrows as maturity approaches, converging toward par at expiry. This predictable price path is what makes PT function as collateral on external lending venues, a dynamic central to how Pendle's open interest is consumed downstream. * A [Yield Token](https://docs.pendle.finance/pendle-v2/ProtocolMechanics/YieldTokenization/YT) is a claim on all yield generated by the underlying from the point of acquisition until maturity. YT holders can claim accrued yield at any time. At expiry, YT's value converges to zero: whatever yield was generated has been captured, and the token carries no residual claim. After maturity, only PT is required to redeem the underlying. Each underlying asset can support multiple Pendle markets at different maturities, each with its own liquidity pool and its own implied rate. Trading occurs through a single PT/SY liquidity pool per market. The [AMM is time-aware](https://docs.pendle.finance/pendle-v2/ProtocolMechanics/LiquidityEngines/AMM): its curve shifts to account for PT's natural price appreciation as maturity approaches, concentrating liquidity around expected yield ranges and reducing impermanent loss for liquidity providers. YT trades route through the same pool via flash swaps. A single pool serves both sides of the yield split. ## SY-Notional in 2025: Activity & Composition SY-notional captures the priced economic throughput flowing through Pendle's V3 markets: the daily volume of Standardized Yield tokens repriced via the AMM, representing how much yield exposure changes hands. * For most of 2025, daily swaps ranged 500–2,000 with trader counts tracking closely. Activity spiked sharply in early November: daily swaps exceeded [9,400 and unique traders hit 8,000.](https://dune.com/queries/6523115/10329644) * Late-2025 throughput was dominated by [Hyperlend](https://dune.com/queries/6530486/10329737), [Ethena (USDe/sUSDe), Resolv, Open Dollar](https://dune.com/queries/6546841/10350401) – almost entirely stablecoin-sourced. ETH-derivative swap activity concentrated in H1 2025 and became minimal after June.