Look up a Treasury security

Every marketable Treasury security priced since September 2008, 2,771 of them, with its price history, auction results, and risk numbers where they apply.

464 of them are still trading and suggested below, priced through September 10, 2026.

Nine characters, letters and digits. Case does not matter. Start typing to match any of the 464 currently benchmarked securities, or enter any CUSIP back to 2008.

Worked examples

What you get, and what depends on the type

Every security has its full price history and its auction results. Risk numbers, yield to maturity, duration, DV01, convexity and key rate durations, are published for nominal notes and bonds. Bills, inflation-linked securities and floating-rate notes need different measures rather than the same ones with gaps: a bill has a discount rate and an investment rate, a linker has a real yield and an index ratio, and a floater has a discount margin. Those measures are computed and stored; what is outstanding is serving them to this site, and each security's page says which it is waiting on.

Index levels before September 30, 2026 are back-tested. They were computed after the fact by applying the rules to historical data, which benefits from hindsight in the choice of rules, and an index cannot be invested in directly. Methodology v1.0 takes effect at that rebalance, when levels begin to be struck on the day; the rulebook is identical either way, and the version is published on every row.

A fitted curve is a fit, not a quote. Daily error averages 3.8 basis points across the history and reaches about 20 on the worst days, in December 2008, when the market was genuinely hard to fit one smooth curve to. Every curve page publishes its own fit error rather than burying it.

Free to benchmark against. Paid only to track. Measuring anything against these curves and indices is free. No license, no fee, no registration, and no permission needed to say that you did, including in a prospectus. A fee applies to one thing: launching a product that tracks an index.

Safe Rate™, Safe Rate Indices™ and the Safe Rate US Treasury Index™ are trademarks of Safe Rate, claimed through use in commerce and not registered. Third-party marks are the property of their owners, which are not affiliated with and do not endorse this data.

Curves are fitted from public Treasury data and carry fit error; figures are not a record of trading, and an index cannot be invested in directly. No claim of compliance with the IOSCO Principles for Financial Benchmarks is made or implied. Not investment advice, not an offer, and not a recommendation to buy or sell any security.