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 stood at 3.63 percent on 24 September 2025, versus 3.61 on the previous day.
Sample. There are 8,939 records overall in the daily time series presented in the figure above. The time range covered by the series is from January 1990 to September 2025.
History. Here are a few simple statistics calculated on the whole sample: the yield recorded a maximum of 8.64 percent on 26 April 1990; it reached its lowest level of 0.04 on 21 May 2021; it was equal on average to 3.00.
Latest values
| Date | Value - Percentage points |
|---|---|
| 2025-09-22 | 3.61 |
| 2025-09-23 | 3.61 |
| 2025-09-24 | 3.63 |
Hint. Our metadata often contain references to the original sources of the data we provide. You can use these references to find additional information.
Not for investment purposes. Data and any other information collected and published on this web site are not meant for investment purposes or any other financial decision. Users should ask for professional advice and perform independent analysis before making any financial commitments.
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 | 5687 | 2003-01-02 | 2025-09-24 |
| 7-year real par yield on Treasuries (percentage points; constant maturity; real) - United States - Department of the Treasury - Daily | 5687 | 2003-01-02 | 2025-09-24 |
| 10-year real par yield on Treasuries (percentage points; constant maturity; real) - United States - Department of the Treasury - Daily | 5687 | 2003-01-02 | 2025-09-24 |
| 20-year real par yield on Treasuries (percentage points; constant maturity; real) - United States - Department of the Treasury - Daily | 5296 | 2004-07-27 | 2025-09-24 |
| 30-year real par yield on Treasuries (percentage points; constant maturity; real) - United States - Department of the Treasury - Daily | 3902 | 2010-02-22 | 2025-09-24 |