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 3.98 percent on 14 August 2026, versus 3.97 on 13 August 2026.
Sample. There are 9,161 records in the daily time series shown in the plot above. The series covers the time span stretching from January 1990 to August 2026.
History. Take a look at some summary statistics we computed on the full sample: the yield recorded a minimum of 0.04 percent on 21 May 2021; it recorded its highest level of 8.64 on 26 April 1990; it was equal on average to 3.02.
Latest values
| Date | Value - Percentage points |
|---|---|
| 2026-08-12 | 4.0 |
| 2026-08-13 | 3.97 |
| 2026-08-14 | 3.98 |
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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 | 5909 | 2003-01-02 | 2026-08-14 |
| 7-year real par yield on Treasuries (percentage points; constant maturity; real) - United States - Department of the Treasury - Daily | 5909 | 2003-01-02 | 2026-08-14 |
| 10-year real par yield on Treasuries (percentage points; constant maturity; real) - United States - Department of the Treasury - Daily | 5909 | 2003-01-02 | 2026-08-14 |
| 20-year real par yield on Treasuries (percentage points; constant maturity; real) - United States - Department of the Treasury - Daily | 5518 | 2004-07-27 | 2026-08-14 |
| 30-year real par yield on Treasuries (percentage points; constant maturity; real) - United States - Department of the Treasury - Daily | 4124 | 2010-02-22 | 2026-08-14 |