What is Pendle?
Pendle is a yield tokenization protocol. It takes yield-bearing assets and splits them into two parts: the principal and the yield. This separation creates new possibilities — fixed-rate positions, yield trading, and strategies that weren't possible before.
The core concept
Imagine you have a stablecoin earning 5% APY in a lending protocol. With Pendle, you can split that position into two tokens:
Principal Token (PT) — Represents your right to the underlying asset at maturity. If you hold PT-USDC maturing in 6 months, you'll receive USDC when that date arrives.
Yield Token (YT) — Represents all the yield generated until maturity. Holding YT means you collect the interest payments, but not the principal.
Why split yield from principal?
This separation enables fixed-rate positions. When you buy a PT at a discount, you're locking in a guaranteed return. If PT-USDC costs $0.97 and matures to $1.00, you've locked in roughly 3% regardless of what happens to floating rates.
It also enables yield speculation. If you think rates will rise, you can buy YT to capture more yield. If you think rates will fall, you can sell YT and lock in current rates via PT.
You have $10,000 in a yield-bearing stablecoin. Current APY is 8%, but you're worried it might drop. Through Pendle, you sell the YT component and keep the PT. You've now converted variable yield into a fixed return — whatever happens to rates, your outcome is set.
How Clearstar uses Pendle
Clearstar vaults often allocate to Principal Tokens. By purchasing PTs at a discount, we lock in predictable returns for a portion of the vault. This adds stability to the yield profile.
For example, a vault might hold PT-reUSD (Jun 2026), which guarantees a specific return at maturity regardless of how reUSD yields fluctuate until then.
Maturity and liquidity
Every Pendle position has a maturity date. At maturity, PT holders redeem 1:1 for the underlying asset. Before maturity, PTs trade on Pendle's AMM at prices reflecting time-to-maturity and current rates.
Liquidity matters. Highly traded pairs have tight spreads; newer or smaller markets may have wider spreads. The AMM is designed specifically for time-decaying assets, so it handles the unique pricing dynamics of PTs and YTs.
Risks to understand
Smart contract risk applies to both Pendle itself and the underlying yield-bearing asset. A problem with either affects your position.
Underlying yield risk means the YT is only valuable if the underlying continues generating yield. If the source protocol fails or yields drop to zero, YT becomes worthless.
Liquidity risk can affect exits before maturity. If the market for your specific PT or YT is thin, you may face slippage when selling.