LibraryMarkets2020Design paperCorpus record
The Yield Protocol: On-Chain Lending With Interest Rate Discovery
Yield Space. Allan Niemerg, Dan Robinson and Lev Livnev.
Yield Space is an invariant between a target asset and a zero-coupon token. The price of the zero-coupon token implies a rate, and the curve is built so that rate behaves like a rate rather than like a spot commodity.
A reading of the public document. Not a copy of it, and not a claim about a later network that reused the name.
A fixed-rate lending pitch should say what is in the pool and what happens at maturity if the pool is unbalanced.
- Evidence
- Primary paper
- Re-measured
- No
- Assumptions
- 3
- Records linked
- 2
Code
Source, repository, and what is actually hosted
- Yield protocol paperhttps://yield.is/YieldSpace.pdf
- The source URL is not a GitHub repository. No code remote is invented.
- Full text is not mirrored. Public availability is not a licence to copy the file onto this site.
- Add to a reading list
01 Claim ledger
What the paper is allowed to say
Each row is a sentence already in the study. The status is the same on every row: a model claim, not a live measurement.
Claim 01 · Paper model
The defect
A constant-product pool quotes a price. It does not quote an interest rate for a loan that matures.
Claim 02 · Paper model
The rule
Yield Space is an invariant between a target asset and a zero-coupon token. The price of the zero-coupon token implies a rate, and the curve is built so that rate behaves like a rate rather than like a spot commodity.
Claim 03 · Paper model
How it is put together
A fyToken, or equivalent, pays one unit at maturity. The pool trades it against the underlying. At maturity the token and the underlying should converge.
Claim 04 · Paper model
Where the claim stops
The paper is the curve, not a promise that a later protocol stayed solvent.
02 Three cuts
Observation, model, falsifier
A desk does not stop at the summary. Each claim is cut three ways, using only this study's own assumptions and checks. Nothing here is a new figure.
01 The defect
Observation
What the study says
A constant-product pool quotes a price. It does not quote an interest rate for a loan that matures.
Falsifier
What would retire it
What token matures into what?
02 The rule
Observation
What the study says
Yield Space is an invariant between a target asset and a zero-coupon token. The price of the zero-coupon token implies a rate, and the curve is built so that rate behaves like a rate rather than like a spot commodity.
Falsifier
What would retire it
What token matures into what?
03 How it is put together
Observation
What the study says
A fyToken, or equivalent, pays one unit at maturity. The pool trades it against the underlying. At maturity the token and the underlying should converge.
Model
What has to hold
Convergence at maturity is an invariant goal, not a legal claim on a borrower.
Falsifier
What would retire it
What token matures into what?
04 Where the claim stops
03 Sequence
One action, as an operating tape
- 01A lender buys the discounted token from the pool.
- 02The discount is the rate.
- 03As maturity approaches, the invariant is meant to pull the price toward par.
- 04What token matures into what?
04 Load-bearing
The argument, and where a pitch drops it
Why it is still on the desk
The cut
A fixed-rate lending pitch should say what is in the pool and what happens at maturity if the pool is unbalanced.
Why it carries weight
If this cut is skipped, the paper's name is being used without the mechanism that makes the name mean anything.
Where it is dropped
Convergence at maturity is an invariant goal, not a legal claim on a borrower.
After the text
The cut
Yield, Element, Sense and others implemented variants. The curve, not the brand, is the citation.
Why it carries weight
If this cut is skipped, the paper's name is being used without the mechanism that makes the name mean anything.
Where it is dropped
The paper is the curve, not a promise that a later protocol stayed solvent.
05 Register
What has to be true
06 Divergence
What happened after the paper
Yield, Element, Sense and others implemented variants. The curve, not the brand, is the citation.
A later client, parameter set, or reward formula is a different object. Cite this paper for the mechanism. Cite a primary release for the network. This desk has not re-run the proof.
07 Pre-mortem
What to check before you use the idea
- 0 of 3 marked on this browser. A mark is a reading note, not a pass, a rating, or a recommendation.
08 Anatomy
The paper, in the order a builder needs
The problem it names
A constant-product pool quotes a price. It does not quote an interest rate for a loan that matures.
What the design proposes
- A fyToken, or equivalent, pays one unit at maturity.
- The pool trades it against the underlying.
- At maturity the token and the underlying should converge.
How the mechanism is specified
- A lender buys the discounted token from the pool.
- The discount is the rate.
- As maturity approaches, the invariant is meant to pull the price toward par.
What this page does not treat as proven
Why the desk still reads it
A fixed-rate lending pitch should say what is in the pool and what happens at maturity if the pool is unbalanced.
09 Lexicon
Terms, opened into the record
- Zero-coupon token
- A claim on one unit of the asset at a stated maturity.
- Implied rate
- The discount of that token to par, over the time left.
10 Repository
Every linked record on this page
Underlined words open a page that already exists: a concept, a protocol profile, a failure record, or another paper. If a word is not underlined, this desk does not have a record for it.
Concepts
Papers
This is Blockchain Lab's reading of a public design paper. It is not the paper, not a copy of it, and not an offer of tokens, equity, custody or a partnership. Later network behaviour can diverge from the text. Nothing here is investment, legal or technical advice.
Research status: Design paper. Last reviewed: 1 October 2026. This is a reading of a public paper, not investment, legal or security advice.