Crypto 101 · Research papers
Yield Provenance: Where Does the Return Come From?
Abstract
We formalise the yield provenance principle: every sustainable yield must correspond to identifiable economic demand, productive activity, risk transfer or payment for a service. We trace the source of yield for lending, automated market makers, proof-of-stake validation and proof-of-work mining, distinguish revenue-funded yield from emission-funded yield, and give a method for decomposing an advertised APY.
Keywords: yield, APY, DeFi, staking rewards, real yield, token emissions
1. The principle
Every sustainable crypto yield must ultimately correspond to identifiable economic demand, productive activity, risk transfer or payment for a service. When someone advertises a 20% APY the first question is not whether to buy but who is paying the 20%, and why.
2. Following the cash flow
Table 1. Sources of yield.
| Source | Payer | Mechanism | Sustainability depends on |
|---|---|---|---|
| Lending | Borrower | Interest | Borrowers wanting capital at that rate; collateral quality |
| Automated market maker | Trader | Trading fee to liquidity providers [1] | Trading volume relative to pool size; impermanent loss |
| Proof-of-stake validation | Network users and protocol | New issuance plus transaction fees to validators | Issuance schedule; fee demand [2, 3] |
| Proof-of-work mining | Network users and protocol | Block subsidy plus fees to miners | Subsidy schedule; fee demand [4, 5] |
| Emissions program | New tokens created | Reward tokens paid to depositors | Continued willingness to be diluted |
3. Revenue versus emissions
Productive yield comes from someone paying for a service: interest for capital, fees for liquidity, transaction fees for block space, payment for infrastructure. Reflexive yield is funded primarily by token emissions, inflation, new investors or circular rewards. It is not necessarily illegitimate, but it is fragile because it depends on the reward token keeping its value and on new participants continuing to arrive.
Two facts from base-layer designs illustrate the difference. Bitcoin's subsidy falls by half every 210,000 blocks, so miners' income increasingly depends on fees [5, 4]. Solana's documented inflation schedule likewise declines over time toward a long-term rate, so staking rewards funded by issuance shrink unless fee revenue grows [3].
4. A method for any APY
1. Write the quoted APY. 2. Identify each component: fee revenue, interest, emissions of a reward token, base issuance. 3. Convert emissions to a dilution rate: how much new supply per year, relative to circulating supply. 4. Subtract dilution from the emission-funded part to see what holders retain. 5. Ask whether the revenue portion would continue if the reward token's price fell by half.
Illustration (hypothetical numbers): a pool advertises 20% APY, of which 3% comes from trading fees and 17% from a reward token whose supply is growing 15% a year. Only the 3% is revenue; the 17% is largely an offset to dilution. The analysis does not say the pool is a bad idea, only that its sustainable yield is closer to 3% than 20%.
5. Why this belongs in a tokenomics course
Supply and demand tell you what is created and what absorbs it. Yield provenance applies the same test to income: where does new value come from, and where is it going? A yield with no identifiable payer is a transfer from someone else, and it is worth knowing who that someone is before joining.
References
- Adams, H., Zinsmeister, N., Salem, M., Keefer, R., & Robinson, D. (2020). Uniswap v2 Core. Whitepaper: constant-product automated market maker with fees paid to liquidity providers. https://uniswap.org/whitepaper-v2.pdf
- ethereum.org (2022). Proof-of-stake (PoS). Ethereum developer documentation for the proof-of-stake consensus mechanism. https://ethereum.org/en/developers/docs/consensus-mechanisms/pos/
- Solana Foundation (2024). Inflation Schedule. Solana developer documentation: initial inflation rate, disinflation rate and long-term rate. Governance proposals (SIMDs) may change these parameters. https://github.com/solana-foundation/developer-content/blob/main/docs/economics/inflation/inflation-schedule.md
- Nakamoto, S. (2008). Bitcoin: A Peer-to-Peer Electronic Cash System. Whitepaper. https://bitcoin.org/bitcoin.pdf
- Bitcoin Core developers (2009). GetBlockSubsidy (src/validation.cpp). Bitcoin Core source code: the consensus rule for the block subsidy (50 coins, halved every nSubsidyHalvingInterval blocks). https://github.com/bitcoin/bitcoin/blob/master/src/validation.cpp
Common questions
What is the yield provenance principle?
Every sustainable crypto yield must trace to identifiable demand: a borrower paying interest, a trader paying a fee, a network paying for security, or users paying for a service.
Is emission-funded yield fraudulent?
Not automatically. Paying users with newly issued tokens is a valid way to bootstrap a network, but it is economically different from revenue because it dilutes existing holders.
General education, not financial, tax or legal advice. Figures are schematic. Protocol parameters are cited to primary sources and can change; verify against the linked source before relying on them.