090°Open data
Open datasets, fully documented — searchable here, and readable by any LLM.
5 datasets
U.S. Department of the Treasury — Fiscal Data
Monthly effective interest rates on U.S. Treasury securities outstanding, by marketable vs. non-marketable type and instrument (bills, notes, bonds, TIPS, savings securities and others), in percent per annum at month-end. History from 2001-01.
Daily U.S. federal debt outstanding from the Bureau of the Fiscal Service's Debt to the Penny dataset: debt held by the public, intragovernmental holdings, and total public debt outstanding, in dollars. Published every business day. Total debt outstanding from 1993-04-01; the held-by-public / intragovernmental split is published from 1997-09-30 (earlier dates carry only the total).
Monthly interest expense on U.S. federal debt outstanding, by category (public issues vs. government account series), group and type — current-month and fiscal-year-to-date amounts in dollars. History from 2010-05.
U.S. federal receipts, outlays and deficit/surplus from the Monthly Treasury Statement (MTS) Table 1: calendar-month detail for each fiscal year and fiscal-year-to-date totals, in dollars. The deficit/surplus series is positive when the government runs a deficit (outlays exceed receipts) and negative for a surplus. Monthly detail from October 2014.
Daily U.S. Treasury par yield curve rates: the par yield (yield to maturity on a hypothetical Treasury security priced at par) for standard maturities, in percent per annum. The Treasury interpolates the curve each business day from closing market bid yields on actively traded Treasury securities, as of about 3:30 PM Eastern. The published tenor grid changed over time: the 1990s history runs from 3 months to 30 years, the 20-year point appears from the mid-1990s, and the 1-month / 1.5-month / 2-month / 4-month points were added later — tenors are null before their introduction by construction. Coverage 1990-01-02 to present, U.S. business days only; each calendar year is fetched from the Treasury's official per-year CSV feed.
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