1-year 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-year US government bonds was 4.58 percent on 29 September 2026, compared to 4.59 on 28 September 2026.
Sample. In this daily time series, there are 9,192 data points. The series covers the time period extending from January 1990 to September 2026.
History. Here are a few summary statistics computed on the entire sample: the yield was equal on average to 3.02 percent; it attained a maximum of 8.64 on 26 April 1990; it recorded a minimum of 0.04 on 21 May 2021.
Latest values
| Date | Value - Percentage points |
|---|---|
| 2026-09-25 | 4.5 |
| 2026-09-28 | 4.59 |
| 2026-09-29 | 4.58 |
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Series Metadata
| Field | Value |
|---|---|
| Description | 1-year 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 | 5940 | 2003-01-02 | 2026-09-29 |
| 7-year real par yield on Treasuries (percentage points; constant maturity; real) - United States - Department of the Treasury - Daily | 5940 | 2003-01-02 | 2026-09-29 |
| 10-year real par yield on Treasuries (percentage points; constant maturity; real) - United States - Department of the Treasury - Daily | 5940 | 2003-01-02 | 2026-09-29 |
| 20-year real par yield on Treasuries (percentage points; constant maturity; real) - United States - Department of the Treasury - Daily | 5549 | 2004-07-27 | 2026-09-29 |
| 30-year real par yield on Treasuries (percentage points; constant maturity; real) - United States - Department of the Treasury - Daily | 4155 | 2010-02-22 | 2026-09-29 |