30-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 30-year US government bonds stood at 4.73 percent on 30 September 2025, compared to 4.71 on 29 September.
Sample. In this daily series, there are 7,949 observations in total. The time period covered by the series is from January 1990 to September 2025.
History. Here’s a quick look at some summary statistics we calculated on the whole sample: the yield averaged 4.74 percent; it hit a peak of 9.18 on 24 September 1990; it recorded a bottom of 0.99 on 9 March 2020.
Latest values
| Date | Value - Percentage points |
|---|---|
| 2025-09-26 | 4.77 |
| 2025-09-29 | 4.71 |
| 2025-09-30 | 4.73 |
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Series Metadata
| Field | Value |
|---|---|
| Description | 30-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: 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 |