About us

This site turns public U.S. Treasury figures into historical viewers you can explore. You can drag the Debt Sphere back through Treasury history, compare the yield curve on different dates, follow the cash balance and the debt limit, and see who holds U.S. Treasury securities.

What you will find here

Historical Viewers. Interactive pages built from recorded Treasury figures, each one showing the record date it comes from.

Data Hub. Each Treasury series used on this site, with its latest record date and a link to the viewer that shows it.

Articles. Articles built from recorded Treasury figures.

Where the figures come from

Every figure comes from public U.S. Department of the Treasury sources, mainly Fiscal Data and the Treasury International Capital System. Each page names its source and the record dates it uses. Where this site works something out from Treasury's figures, such as a share, a spread or a change between two dates, the page says "Calculated from Treasury data."

Treasury publishes its figures with a delay, so the latest figures are usually one business day behind, and some series are published monthly. Treasury may revise figures after it publishes them. Gaps in Treasury's records are shown as gaps and are never filled in or estimated.

What this site is not

This site is not affiliated with or endorsed by the U.S. Department of the Treasury or any government agency. It shows the historical record. It does not make forecasts, and nothing here is financial, investment, legal or tax advice. This site is not a registered investment adviser or broker-dealer. Information is provided as is, and while this site works to keep it accurate and current, it may contain errors or delays. Check any figure against the original Treasury source before relying on it. This site is operated by Zemria LLC.

Questions or corrections

If you find a figure that looks wrong, or you would like to talk about working together, use the Work with us page. Corrections are made openly.