Yield

Introduction

Modules 05 and 06 covered two places yield can come from: trading fees earned by liquidity providers, and interest paid by borrowers. This lesson steps back and asks a broader question: when a protocol advertises a return, where does that number actually come from, and will it still be there next month.

This lesson explains the real sources yield can come from, how APR and APY differ, why Total Value Locked (TVL) is a useful signal but not a guarantee, and how to recognize when an advertised yield exists only to attract deposits rather than to last.

By the end of this lesson you will be able to look past a headline percentage and ask the one question that matters: is this yield being paid out of real activity, or is it being paid out of new deposits.

Sources of Yield

Every yield number in DeFi is paid from one of a small number of underlying sources, and the same advertised APY can come from a completely different mix depending on the protocol.

The first two sources are backed by real economic activity; the third depends entirely on the protocol's own token remaining valuable.

APR and APY

Annual Percentage Rate (APR) is a simple yearly rate with no compounding: it assumes you never reinvest what you earn. Annual Percentage Yield (APY) assumes earnings are reinvested continuously, so it compounds over the course of the year.

The same underlying rate produces a higher APY than APR, purely because of compounding, which is why protocols often advertise the larger APY number even when the actual rate paid is more modest.

Always compare APR to APR and APY to APY. Comparing one protocol's APR to another's APY makes the second look worse than it actually is.

Total Value Locked (TVL)

Total Value Locked, or TVL, is the total value of assets currently deposited in a protocol. It's commonly used as a rough measure of how much capital trusts a protocol enough to use it.

TVL is useful context, but it isn't a guarantee of safety: a high TVL can still be concentrated in a few large depositors, and it can leave just as quickly as it arrived if incentives change.

Treat TVL as one data point among several, not as proof that a protocol's yield is sustainable.

Token Emissions

Emissions are new tokens a protocol creates and distributes as rewards, usually to attract early liquidity before trading fees or interest alone would be enough to compete with other protocols.

Because emissions are newly created supply, distributing them increases the total number of tokens in circulation, which puts downward pressure on that token's price unless demand grows just as fast.

• Bootstrapping liquidity. Emissions can attract deposits quickly when a protocol is new and has little organic activity yet.
• Diluting existing holders. Every new token distributed slightly reduces the share everyone else's tokens represent.
• Fading over time. Most emissions schedules are designed to decrease, meaning the advertised APY funded by them typically falls as the protocol matures.

An APY that's mostly emissions is really a temporary subsidy, not a return generated by the protocol's actual activity.

Real Yield vs Emissions Yield

"Real yield" describes returns paid from a protocol's actual revenue, trading fees or borrowing interest, in an asset that already has independent value, rather than in newly minted tokens.

Emissions yield can still be worth participating in, but it should be understood for what it is: a reward paid in a token whose price depends on continued demand, not a fee earned from existing economic activity.

A protocol advertising 40% APY made almost entirely of emissions is telling you something very different than one advertising 4% APY made entirely of trading fees.

Yield Strategies

A yield strategy is simply a plan for where to deposit assets and how to move them over time to capture return, ranging from a single deposit left untouched to actively rotating capital between several protocols.

• Single-protocol staking. Deposit once, earn a steady rate, minimal ongoing management.
• Liquidity provision. Earn trading fees, while accepting the risk of impermanent loss covered in Module 05.
• Active farming. Move capital between protocols to chase the highest current incentive, accepting higher effort and higher risk.

More complex strategies aren't automatically better; they usually trade simplicity and lower risk for a chance at a higher, less certain return.

Compounding

Compounding means reinvesting the yield you've already earned so that future returns are calculated on a larger base, rather than withdrawing rewards as they arrive.

The more frequently rewards compound, the higher the resulting APY, which is exactly the relationship covered earlier: identical base rates produce different APYs depending on how often they compound.

Frequent manual compounding can be eaten up by transaction fees on some networks, which is part of why automatic compounding vaults exist.

Evaluating Sustainability

Before depositing into anything advertising a high yield, a few questions consistently separate a durable return from a temporary one.

• Where does the yield come from? Real fees and interest, or newly minted emissions.
• Is the rate advertised as APR or APY? Confirm you're comparing like with like against other options.
• What happens to the schedule over time? Emissions schedules that decrease mean today's rate is not tomorrow's rate.
• Has TVL been stable or fleeing? Rapid TVL outflows often precede an emissions schedule running dry.
• Would the yield exist without new deposits funding it? If the answer is no, it is a subsidy, not a return.

Summary

Yield in DeFi comes from a mix of staking rewards, trading fees, and token emissions, and the same advertised number can be backed by very different mixes of these three sources. APR and APY describe the same underlying rate differently depending on whether compounding is included.

TVL is a useful signal of activity but never a guarantee of safety, and yield made mostly of emissions is a temporary subsidy rather than a durable return. The most useful habit from this lesson is asking where a yield number actually comes from before trusting it.

Glossary

Yield

Any return earned on deposited assets, from staking rewards, trading fees, interest, or token emissions.

APR

Annual Percentage Rate: a yearly return with no compounding assumed.

APY

Annual Percentage Yield: a yearly return that assumes earnings are reinvested and compound over time.

TVL

Total Value Locked: the total value of assets currently deposited in a protocol.

Emissions

New tokens a protocol creates and distributes as rewards, increasing that token's circulating supply.

Real Yield

Return paid from a protocol's actual fees or interest, rather than from newly minted tokens.

Compounding

Reinvesting earned yield so future returns are calculated on a larger base.

Yield Farming

Actively moving assets between protocols to capture the highest available return.

Dilution

The reduction in each token holder's relative share caused by new token emissions.

Yield Strategy

A plan for where to deposit assets, and how (or whether) to move them, to capture return.

Quiz

Check your understanding of this lesson before moving on. Incorrect answers point you straight back to the relevant section.