Coverage 2001-01-01 to 2026-06-01 · series id fiscaldata/avg_interest_rates:treasury_bills
Recent values
| Period | Value | Revision |
|---|---|---|
| 2026-06-01 | 3.706 | 1 |
| 2026-05-01 | 3.69 | 1 |
| 2026-04-01 | 3.696 | 1 |
| 2026-03-01 | 3.702 | 1 |
| 2026-02-01 | 3.72 | 1 |
| 2026-01-01 | 3.76 | 1 |
| 2025-12-01 | 3.86 | 1 |
| 2025-11-01 | 3.983 | 1 |
| 2025-10-01 | 4.075 | 1 |
| 2025-09-01 | 4.187 | 1 |
| 2025-08-01 | 4.283 | 1 |
| 2025-07-01 | 4.314 | 1 |
Verification history
| Check | Result | Expected | Actual | When |
|---|---|---|---|---|
| freshness | pass | 10h ago | ||
| freshness | pass | 3d ago |
License and citation
License public-domain (terms). Source: U.S. Department of the Treasury, Bureau of the Fiscal Service, Fiscal Data.
Official table: Average Interest Rates on U.S. Treasury Securities · U.S. Department of the Treasury, Bureau of the Fiscal Service
Use it
curl "https://starwell.dev/api/starwell/v1/sources/fiscaldata/series/avg_interest_rates:treasury_bills/observations?latest=12"
Download CSV — full history with attribution, spreadsheet-ready.
Embed the chart
A live SVG of this series, attribution included, refreshed hourly:
<img src="https://starwell.dev/sources/fiscaldata/avg_interest_rates:treasury_bills/chart.svg"
alt="Average Interest Rate Amount: Treasury Bills" width="720" />
curl -X POST "https://starwell.dev/api/starwell/v1/answer" \
-H "Content-Type: application/json" \
-d '{"question": "What is the latest value?", "series": [{"source": "fiscaldata", "seriesId": "avg_interest_rates:treasury_bills"}]}'