How Does Pendle Work?

Split yield-bearing assets into Principal Tokens (PT) and Yield Tokens (YT)

Core innovation: any yield-bearing asset is split into PT (redeemable for principal at maturity) and YT (captures all yield until maturity). This creates a fixed-income market for DeFi yields.

Custom AMM with time-decay curve optimized for PT/YT trading

Pendle's AMM uses a modified constant-product curve that accounts for time decay as tokens approach maturity. Liquidity concentrates around fair value, reducing impermanent loss for LPs.

Boros: leveraged funding rate speculation via Yield Units (YUs)

Boros allows leveraged trading of CEX funding rates (BTC, ETH from Binance). YUs tokenize funding rate income/expense. Reached ~$250M peak open interest in January 2026 with cumulative trading volume exceeding $14B. Expanding to commodity (WTI, gold, silver) and equity perp funding rates in H2 2026. ChainSecurity 2026 audit found one critical issue (empty orderbook bad debt) fixed in v2; settlement process noted as exceptionally complex; admin permissions required for liquidations.

Fixed-rate yield exposure through PT purchases

Buying PT at a discount and holding to maturity locks in a fixed yield. This is the primary retail use case and replicates zero-coupon bond mechanics.

Leveraged yield exposure through YT purchases

Buying YT provides leveraged exposure to future yields. If actual yields exceed the implied rate, YT holders profit; if yields compress, YT can expire worthless.

sPENDLE: liquid staking governance token replacing vePENDLE lockups (Jan 2026 upgrade)

sPENDLE replaced the 2-year vePENDLE lock model in January 2026. 1:1 conversion from PENDLE; 14-day unstaking period or instant exit for 5% fee. Fully fungible and composable. Revenue allocation: 80% of protocol revenue directed to buybacks distributed to sPENDLE holders. Algorithmic KPI-based emission allocation replaces manual voting. The upgrade reduces token velocity headwinds and substantially improves fee capture mechanics. As of mid-2026, ~36% of PENDLE supply is staked and 2M PENDLE has been repurchased. Weekly emissions cut 77% (from ~90K to ~21K PENDLE/week).

On-chain yield rate oracles for PT/YT pricing

Pendle provides yield rate oracles that other protocols consume. These oracles are critical for DeFi integrations that use PT/YT as collateral.

Deployments on Ethereum, Arbitrum, BNB Chain, Optimism, Mantle, Monad

Multi-chain deployment extends yield tokenization across EVM networks. Monad launch accumulated ~$150M TVL within one month of launch. Solana, Hyperliquid, and TON deployments announced for H2 2026.

A significant share of Pendle's $1.2B TVL remains in Ethena USDe-linked pools. An Ethena depeg or yield collapse directly impacts the majority of Pendle's ecosystem. TVL contracted from $5.8B to $1.2B as Ethena incentive cycles ended, but the structural concentration risk persists.

YT buyers take leveraged yield exposure. When yields compress (as in late 2025 when Ethena yields fell to 4.6%), YT positions lose value rapidly and can expire worthless.

Leveraged funding rate speculation via Boros introduces perp-like liquidation risk to a yield platform. Rapid funding rate reversals can cascade through ~$200M in open interest (ATH $250M in January 2026; note: the $6.9B figure cited in earlier scans was cumulative trading volume, not open interest). Boros is expanding to commodities and equity perps in H2 2026.

As PT approaches maturity, liquidity concentrates and AMM curve behavior changes. Large position exits near maturity can cause significant slippage.

The January 2026 sPENDLE upgrade eliminated the 2-year vePENDLE lockup, improving liquidity but also reducing the stickiness of locked supply. With instant 5% exit or 14-day unstaking, large holders can rotate out faster than before, increasing potential sell pressure during adverse market conditions. However, 80% revenue buybacks partially offset this by providing consistent demand-side support.