1-month par yield on Treasuries (percentage points; constant maturity; nominal) - United States - Department of the Treasury - Daily
This series is part of the dataset: US Treasury constant-maturity par yields (Department of the Treasury)
Download Full Dataset (.xlsx)Latest updates. According to data published by the US Treasury, the par yield on 1-month US government bonds was 3.97 percent on 18 September 2026, the same as on the previous day.
Sample. In this daily time series, there are 6,286 data points. The series covers the time span extending from July 2001 to September 2026.
History. Here's a glimpse of a few simple statistics we computed on the full sample: the yield had a mean of 1.72 percent; it hit a peak of 6.02 on 26 May 2023; it reached a trough of 0.00 on 10 December 2008.
Latest values
| Date | Value - Percentage points |
|---|---|
| 2026-09-16 | 3.96000 |
| 2026-09-17 | 3.97000 |
| 2026-09-18 | 3.97000 |
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Series Metadata
| Field | Value |
|---|---|
| Description | 1-month yield US Treasury par yield curve |
| Country | United States |
| Economic concept | Interest rate |
| Data type | Constant-maturity nominal par yield |
| Deflation method | Not applicable |
| Seasonally adjusted | No |
| Rescaling | None |
| Frequency | Daily |
| Unit | Percentage points |
| Source | U.S. Department of the Treasury |
| Source type | Federal Administration |
| Data licence | Not copyrightable under U.S. law |
| Measure type | Interpolated level (constant maturity) |
Series in the same data set
Discover the other time series included in this data set.
Nominal yields
Real yields
| Series Name | Observations | Start Date | End Date |
|---|---|---|---|
| 5-year real par yield on Treasuries (percentage points; constant maturity; real) - United States - Department of the Treasury - Daily | 5933 | 2003-01-02 | 2026-09-18 |
| 7-year real par yield on Treasuries (percentage points; constant maturity; real) - United States - Department of the Treasury - Daily | 5933 | 2003-01-02 | 2026-09-18 |
| 10-year real par yield on Treasuries (percentage points; constant maturity; real) - United States - Department of the Treasury - Daily | 5933 | 2003-01-02 | 2026-09-18 |
| 20-year real par yield on Treasuries (percentage points; constant maturity; real) - United States - Department of the Treasury - Daily | 5542 | 2004-07-27 | 2026-09-18 |
| 30-year real par yield on Treasuries (percentage points; constant maturity; real) - United States - Department of the Treasury - Daily | 4148 | 2010-02-22 | 2026-09-18 |