What is the Bitcoin yield curve?

A yield curve is the price of time

The Bitcoin yield curve shows what it costs to borrow against Bitcoin at each loan maturity — a week, a month, a year — plotted as a line. Read left to right, it is the price of borrowing for longer.

Every serious credit market has one. Treasuries have a curve; SOFR has a curve. They exist because many participants trade instruments with fixed maturities, and the price at each maturity is discovered by people willing to be wrong about it. Until recently Bitcoin credit had neither half of that, which is why it had no curve.

Why Bitcoin did not have one

Not for lack of lending. Bitcoin-collateralised lending has existed for years, at scale. It lacked a curve for two structural reasons, and both had to be fixed before a curve was even possible.

There were no fixed terms. The dominant on-chain model is a pooled, floating-rate loan: you deposit collateral, you borrow, and the rate moves continuously with how much of the pool is currently lent out. You can repay whenever you like. That is a useful product, but it has no maturity — and a term structure is, definitionally, a function of term. There is nothing to plot along the x-axis.

And the rate was computed, not discovered. In a utilisation-curve protocol, the interest rate is output by a formula chosen in advance by governance: at 80% utilisation the rate is whatever the curve says it is. Nobody bid. Nobody expressed a view on whether that rate compensates the risk. It is a parameter wearing the costume of a price.

What has to be true for a curve to exist

Two things, and they are the same two things that make the Treasury curve meaningful.

Fixed maturities. A loan has to have a term, agreed at the start, that both sides are committed to. Only then does "the 30-day rate" name something distinct from "the 90-day rate".

Discovered prices. The rate at each maturity has to come from someone taking a position — a lender saying "I will lend at this rate for this long" and being exposed if they judged it wrong. A number that nobody staked anything on carries no information.

Where this curve comes from

On the Gavel Protocol a borrower posts Bitcoin (WBTC) as collateral and describes the loan they want: an amount in USDC, a duration, and the most they are willing to repay. Lenders then compete in an open auction, bidding the rate down. The auction closes, the loan settles on-chain, and that settlement is one point on the curve: a real rate, at a real maturity, that two parties actually agreed to.

Collect enough of those and you have a term structure. It is fitted — a log-quadratic through volume-weighted tenor bins — and the fit publishes its own error, so you can judge how much to trust it rather than taking it on faith.

There is no price oracle anywhere in a loan's life. Nothing reads an external feed to decide the rate, and nothing liquidates against one mid-term. This matters more than it sounds: an oracle is a dependency, and every rate derived through one inherits that oracle's failure modes. These rates inherit nothing — each is a transaction that happened.

How to read it

Upward-sloping is the ordinary shape: lending for longer costs more, because more can go wrong over a year than over a week, and the lender's capital is committed for longer.

Flat says the market sees little difference between near and far — often a market with no strong view, or one where short-term risk is elevated enough to close the gap.

Inverted — short rates above long — is the interesting one. In sovereign bonds it is read as a recession signal. In a credit market it usually says something more direct: right now is riskier than later. Stress is priced at the front.

The shape carries the information, not the level. A rate on its own tells you what credit costs; the curve tells you what the market thinks about time.

What it is not

It is not a risk-free rate, despite the temptation to read it as crypto's answer to Treasuries. It is the rate at which over-collateralised Bitcoin credit cleared, and it includes whatever the market prices for smart-contract risk, collateral volatility, and the borrower's option to walk away from the loan. Comparing it to a sovereign yield without adjusting for those is comparing two different objects.

It is also not a quote. It is a record of rates that settled. Where the market has not discovered a tenor, it stays empty — the gap is not interpolated across, and the curve is not extended past the longest loan anyone has actually made.

Where to see it

The live curve is published as ASCR-BTC, an instance of the Auction-Settled Credit Rate (ASCR) family, with a permanent methodology page and a revision policy. It is free to cite, chart and republish with attribution.

As of today the mainnet market has not yet settled enough auctions to produce a curve, and nothing is drawn until it does. That is the honest state: the venue is live and open, and the price has not been discovered yet.