APY (Annual Percentage Yield)

Definition

APY estimates yearly return assuming rewards are compounded. In crypto it is often used for staking, lending, and farm APRs that may not actually compound the same way, so always read the fine print behind the headline yield.

High APY is frequently a dilution advertisement. If rewards are paid in the protocol token, you may be earning emissions that pressure the same asset. Separate organic fee yield from incentive yield in every note.

Compounding assumptions break when rewards are discrete, when you cannot auto-compound safely, or when gas and lockups eat the math. Translate APY into expected tokens over your real holding period.

Unsustainable yields collapse when rewards end. Stress-test TVL and usage at half or zero incentive APY before treating the number as a fundamental. Points are optionality; do not mark them to a fantasy fully diluted price.

Why researchers care

• High APY can mean high emissions — check token dilution.
• Compare APY to real fee revenue, not just incentives.
• Unsustainable yields collapse when rewards end.
• Compounding assumptions often do not match product mechanics.

How to use it in research

• A farm quoting 400% APY mostly in emissions — model sell pressure if farmers dump daily.
• Lending APY backed by fees versus temporary liquidity mining — label each component.
• Staking APY on an inflationary L1 — net against dilution for non-stakers.

Common mistakes

• Comparing APY to APR without adjusting for compounding claims.
• Ignoring that reward tokens can crash faster than yield accrues.
• Treating points-driven “yield” as cash APY.