Implied Rate

The implied rate is how Pendle turns a variable, floating yield into a fixed one. It is the annualized return you secure by buying a principal token (PT) at a discount today and holding it until it redeems for the full underlying at maturity.

What it actually means

A Pendle PT represents the right to redeem one unit of an underlying asset at a fixed future date. Before that date, it trades below the redemption value: 1 PT-asset might cost 0.95 of the underlying today but redeem for a full 1.00 at maturity. That discount is not arbitrary. Annualized over the time left until maturity, it is the implied rate, also called the fixed or implied APY. It is the market's current price for locking in yield on that asset until the maturity date.

How it is calculated

The implied rate converts the PT discount into an annual figure, accounting for how much time is left. The longer you wait for the same discount, the lower the annualized rate, and vice versa.

Two relationships fall out of this. First, the implied rate moves inversely to PT price: as buyers bid the PT up toward 1.00, the discount shrinks and the fixed rate falls; as the PT cheapens, the fixed rate rises. Second, the rate reflects the market's expectation of future yield on the underlying. If the market expects the floating yield to be high, PTs trade at a deeper discount and the implied rate climbs to match.

Why it matters to you

The implied rate is the number you are actually agreeing to when you buy a PT. It tells you the exact fixed APY you will earn if you hold to maturity, independent of what the underlying floating yield does afterward. That lets you compare a fixed Pendle position against a floating lending rate on the same asset: if the implied rate is meaningfully above the floating rate you expect, fixing it in can be attractive; if floating yields look set to rise above the implied rate, staying floating may pay more.

Real example

• You buy a PT for a yield-bearing stablecoin at 0.95, with 90 days until maturity.
• At maturity each PT redeems for 1.00 of the underlying, regardless of how the floating yield moved in between.
• Your locked-in return is the discount annualized, roughly 22% fixed APY in this case.
• If, the day after you buy, demand pushes the PT price to 0.97, the implied rate for new buyers falls, but your fixed return is already locked at the rate you bought in at.

Common misconceptions

• The implied rate is fixed only if you hold to maturity. Sell early and you realize the market price then, not the locked-in rate.
• A higher implied rate is not free yield. It often reflects higher expected floating yield or added risk in the underlying.
• The implied rate is not the same as the underlying's current floating APY. It is the market's forward-looking price for fixing that yield.

How Otomato monitors it

Otomato detects your Pendle PT positions automatically when you add a wallet, with no setup required. It keeps track of what matters for a fixed-yield position, including the approaching maturity date and material moves in the implied rate or the health of the underlying, and stays quiet while your position is on track. You get a single low-noise alert only when something changes that deserves a decision, such as maturity drawing near or the underlying showing stress. If Otomato is silent, your fixed-yield positions are running as expected.

Monitor this in your portfolio

Otomato detects your positions automatically and alerts you only when something material changes. No setup, no signatures.

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