6-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 6-month US government bonds was 3.83 percent on 30 September 2025, compared to 3.84 on 29 September 2025.
Sample. In this daily time series, there are a total of 8,943 data points. The time span covered by the series extends from January 1990 to September 2025.
History. Here's a snapshot of a few summary statistics we computed on the whole sample: the yield attained a maximum of 8.49 percent on 1 May 1990; it reached its lowest level of 0.02 on 26 August 2011; it averaged 2.90.
Latest values
| Date | Value - Percentage points |
|---|---|
| 2025-09-26 | 3.83 |
| 2025-09-29 | 3.84 |
| 2025-09-30 | 3.83 |
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Series Metadata
| Field | Value |
|---|---|
| Description | 6-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: Nominal yields
Series in the same data set: 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 | 5691 | 2003-01-02 | 2025-09-30 |
| 7-year real par yield on Treasuries (percentage points; constant maturity; real) - United States - Department of the Treasury - Daily | 5691 | 2003-01-02 | 2025-09-30 |
| 10-year real par yield on Treasuries (percentage points; constant maturity; real) - United States - Department of the Treasury - Daily | 5691 | 2003-01-02 | 2025-09-30 |
| 20-year real par yield on Treasuries (percentage points; constant maturity; real) - United States - Department of the Treasury - Daily | 5300 | 2004-07-27 | 2025-09-30 |
| 30-year real par yield on Treasuries (percentage points; constant maturity; real) - United States - Department of the Treasury - Daily | 3906 | 2010-02-22 | 2025-09-30 |