Pendle Finance is a yield-tokenization protocol that splits a yield-bearing asset into two separate tradable tokens: a Principal Token (PT) that redeems for the underlying at maturity, and a Yield Token (YT) that captures all variable yield until maturity. The split lets traders lock fixed yield, speculate on variable yield, or write directional yield strategies on stablecoin markets like sUSDe, sUSDS, and eETH. Pendle V2 launched on Ethereum in late 2023 and now runs on Arbitrum, BNB Chain, Optimism, Base, Mantle, and several other EVM networks.
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This explainer walks through the mechanism, the AMM that prices PT and YT against the underlying, the live stablecoin and LST markets traders use most, and the risks that make Pendle a structurally different position from a vanilla deposit on Aave or a Sky savings rate.
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Pendle Finance is a permissionless protocol that tokenizes future yield. A user deposits a yield-bearing token such as sUSDe or stETH into a Standardized Yield (SY) wrapper, then splits that wrapper into a Principal Token redeemable for the underlying at a fixed expiry and a Yield Token claiming all yield accrued before expiry. Both halves trade on Pendle's purpose-built AMM.
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The protocol's design borrows from interest-rate strip markets in traditional finance, where Treasury STRIPS separate a bond's principal from its coupon stream. Pendle applies that primitive to onchain yield sources: liquid staking tokens, restaking tokens, lending receipts, and yield-bearing stablecoins. As of Q1 2026, Pendle is among the larger DeFi protocols by total value locked, with the bulk of TVL in stablecoin-denominated pools per the DeFiLlama protocol page.
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Each market on Pendle has a fixed expiry date — typically 3, 6, or 12 months from launch. After expiry, PT redeems 1:1 for the underlying, YT goes to zero, and the market closes. Roll trades into a fresh expiry are how active users maintain exposure across cycles. The full spec lives in the Pendle V2 documentation.
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Pendle wraps the source asset in a Standardized Yield (SY) token, then mints a matched pair of PT and YT against it. PT carries the right to redeem one unit of the underlying at expiry. YT carries the right to claim all yield the SY accrues from now until expiry. The two halves sum to one SY at any moment, enforced by the contract.
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A worked example: a user deposits 100 sUSDe into Pendle's December 2026 market. They receive 100 PT-sUSDe and 100 YT-sUSDe. The PT will redeem for 100 sUSDe on the expiry date regardless of what Ethena's funding rate does. The YT entitles the holder to every dollar of staking yield those 100 sUSDe earn between now and expiry — high if funding stays positive, near zero if funding collapses. Holders can then sell either side on the AMM, hold both, or recombine PT and YT into the original SY at any time before expiry. The mint and redeem flow is described in the PT mechanics and YT mechanics docs.
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Because PT trades at a discount to the underlying — a 6-month PT-sUSDe might trade at 96 sUSDe, redeemable for 100 sUSDe at expiry — the buyer locks in an annualized fixed yield based on the discount and the time to maturity. The seller hands over the PT in exchange for capital that they can deploy elsewhere. That is the trade most stablecoin allocators come to Pendle for.
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Buying a PT at a discount and holding it to expiry produces a fixed, predictable return. If a 6-month PT-sUSDe trades at 0.96 sUSDe per token, a buyer who holds to expiry receives 1.00 sUSDe per token, an 8.3% annualized fixed yield in sUSDe terms. The variable Ethena yield over those six months accrues entirely to YT holders, not to the PT buyer.
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This is the structural difference between Pendle and a Sky savings rate, an Aave deposit, or an Ethena sUSDe stake: those positions earn whatever the variable rate happens to be over the holding period. A PT locks the rate the day you buy. Allocators with a hard return target — corporate treasuries, structured product issuers, looped-stablecoin vaults — use PTs to fix yield against quoted liabilities. Pendle's docs walk through the math in the AMM section, and aggregators like Pendle's own market explorer publish implied APYs across every active expiry.
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PT yields move with the market. When variable yields on the underlying rise, PT discounts deepen and locked rates climb; when variable yields compress, PT discounts shrink. Traders who think yields will fall buy PTs to lock today's rate. Traders who think yields will rise sell PTs and buy YTs, which leads to the second half of the strategy.
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Buying a YT is a leveraged bet that the underlying's variable yield will exceed what the market has priced in. Because YT trades cheap — a YT-sUSDe might cost 4 sUSDe per token while controlling the yield on a full 100 sUSDe of notional — a small capital outlay buys exposure to a much larger yield stream. If realized yield beats the implied rate, YT pays off; if it underperforms, YT decays toward zero at expiry.
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YT is the cleanest onchain instrument for trading a yield curve. Funds taking a view on Ethena funding rates, EigenLayer points multipliers, or Sky savings rate changes buy YT when they expect upside and short or avoid it when they expect compression. Because YT decays as expiry approaches even if variable yield holds steady, holding YT through to expiry is rarely the right trade — most YT positions are sized for a directional move and closed before time decay dominates. The YT documentation and Pendle's academy videos cover the decay dynamics in detail.
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A worked example: a trader buys YT-sUSDe at an implied yield of 12%. If realized Ethena yield averages 18% over the period, the YT pays out the realized yield and the trader's effective return on YT capital is multiples of the underlying move. If realized yield averages 6%, the YT pays half what was implied and the trader takes a loss. This is why YT is treated as a speculation instrument rather than a yield-harvesting one.
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Pendle's V2 AMM is a yield-aware liquidity pool that prices PT against SY using a specialized invariant tuned for assets with a known maturity. As expiry approaches, the AMM concentrates liquidity tighter around par because PT must converge to 1:1 redemption value. The curve adapts to time-to-maturity rather than treating PT like a fixed-volatility token.
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Liquidity providers supply PT plus SY (not PT plus YT) and earn a share of swap fees plus PENDLE token incentives. Because the AMM tracks an implied yield rather than a spot price, impermanent loss behaves differently from a Uniswap V2-style pool. The detailed math is in the Pendle V2 AMM whitepaper section; third-party explainers from Pendle's research blog walk through the curve geometry visually.
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Pendle also exposes a YT pricing function: because PT + YT = SY at all times, YT price is computed as SY price minus PT price. That identity removes the need for a separate YT pool and concentrates liquidity in the PT/SY pair. It also means YT slippage is mechanically tied to PT slippage on the same market.
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The largest Pendle markets in Q1 2026 sit in three buckets: yield-bearing stablecoins (sUSDe, sUSDS, sDAI, USD0++), liquid restaking tokens (eETH, ezETH, rsETH), and lending-protocol receipts (aUSDC, aUSDT). Each market trades on multiple expiries — typically a near-term 3-month, a benchmark 6-month, and a long-dated 12-month — so traders can pick a duration that fits their view.
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Stablecoin markets dominate the protocol's TVL. Ethena's sUSDe routinely runs the deepest pools, with PT-sUSDe acting as one of DeFi's most liquid fixed-yield stablecoin instruments. Sky's sUSDS markets grew rapidly after the MakerDAO-to-Sky rebrand and the launch of the Sky Savings Rate, per DeFiLlama Sky data. Restaking markets like eETH and ezETH carry both an ETH-staking yield component and an EigenLayer points component, which makes their YTs popular for points speculation.
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The table below summarizes the typical structure across the major Pendle market families. Live APYs and TVLs are published on the Pendle markets app and the DeFiLlama page; figures move daily.

Pendle stacks several risk layers that a vanilla deposit does not. Smart contract risk applies to Pendle's V2 contracts and the underlying SY wrapper. Underlying-asset risk passes through fully: a PT-sUSDe holder bears Ethena depeg risk, a PT-eETH holder bears EtherFi and EigenLayer slashing risk. Time-to-maturity risk means PT prices can move sharply intramaturity even though redemption value is fixed.
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YT carries time decay as a structural cost — every day held without realized yield exceeding implied yield is a day of loss. Liquidity risk on long-dated expiries is real: a 12-month PT may trade at a wider spread than a 3-month, and exiting size before maturity can require accepting slippage. Pendle has been audited multiple times by firms including Ackee Blockchain and Spearbit, with reports linked from the Pendle security page; users should still treat any single audit as necessary but not sufficient.
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Regulatory exposure is also non-trivial. PT-style fixed-yield instruments resemble zero-coupon notes, and YT-style yield strips resemble derivative contracts. Jurisdictions treat tokenized yield products inconsistently. The Pendle protocol itself is permissionless, but interfaces and integrators in some regions geofence access.
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Pendle sits one layer above the primary yield sources. A user does not earn yield from Pendle itself the way they earn from Sky's SSR or Ethena's sUSDe; Pendle restructures the yield those primaries already produce. That makes it complementary to issuers like Ethena and Sky rather than competitive with them.
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For allocators choosing where to put stablecoin capital, Pendle is one of three structurally different options: (1) hold the yield-bearing token directly and accept variable yield, (2) deposit through a yield aggregator that auto-rotates between primaries, or (3) buy a Pendle PT to lock a fixed rate. Each carries a different risk and operational profile. Cross-chain stablecoin movement between primaries — moving USDC into Ethena to mint sUSDe, or routing capital between chains where Pendle markets live — is a common requirement, and Eco's stablecoin routing infrastructure handles that leg for several integrators.
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Sources and methodology. Mechanism descriptions verified against the Pendle V2 documentation. TVL and market-family data pulled from DeFiLlama in Q1 2026. Stablecoin supply context from the Eco internal live-data snapshot (May 2026). Yield rates and audit history reference Pendle's official security page. Figures refresh quarterly.
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Updated May 2026.
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