3-month Treasury yield (constant maturity), United States
3-month Treasury yield (constant maturity) was 4.09% in September 2026, up 0.21 pp from August 2026 and up 0.02 pp from a year earlier. The figure is published by Board of Governors of the Federal Reserve System in H.15. The series starts in January 2006 and has 249 observations. Source: Board of Governors of the Federal Reserve System.
- On the previous reading (August 2026): up 0.21 pp, to 4.09%
- On a year earlier (September 2025): up 0.02 pp
- Against the five-year average of 3.92%: above
Sparklines: the last ten years; the amber dot marks the reading in the tile. Source: Board of Governors of the Federal Reserve System. EconoMonitor is not affiliated with or endorsed by the Federal Reserve.
Overview
Over the last five years the series ranged from 0.04% (September 2021) to 5.60% (October 2023). Since January 2006 the full range is 0.01% (September 2011) to 5.60% (October 2023).
Key facts
| Reading | Period | Value |
|---|---|---|
| Latest | September 2026 | 4.09% |
| Previous | August 2026 | 3.88% |
| A year earlier | September 2025 | 4.07% |
| Five-year high | October 2023 | 5.60% |
| Five-year low | September 2021 | 0.04% |
| First observation | January 2006 | 4.34% |
Unit: percent. Source: Board of Governors of the Federal Reserve System. EconoMonitor is not affiliated with or endorsed by the Federal Reserve.
How has it moved since January 2006?
Full history
- 3-month Treasury yield (constant maturity) 4.1%
Last five years
- 3-month Treasury yield (constant maturity) 4.1%
Latest readings
| Period | Value | Change from previous |
|---|---|---|
| September 2025 | 4.07% | -0.23 pp |
| October 2025 | 3.98% | -0.09 pp |
| November 2025 | 3.94% | -0.04 pp |
| December 2025 | 3.68% | -0.26 pp |
| January 2026 | 3.67% | -0.01 pp |
| February 2026 | 3.69% | +0.02 pp |
| March 2026 | 3.72% | +0.03 pp |
| April 2026 | 3.70% | -0.02 pp |
| May 2026 | 3.69% | -0.01 pp |
| June 2026 | 3.81% | +0.12 pp |
| July 2026 | 3.87% | +0.06 pp |
| August 2026 | 3.88% | +0.01 pp |
| September 2026 | 4.09% | +0.21 pp |
How does the latest reading compare?
The latest reading of 4.09% in September 2026 is above its five-year average of 3.92% and above its ten-year average of 2.51%. It is higher than 78% of all 249 readings since January 2006. It has risen for 4 readings in a row up to September 2026. Over the last 12 readings, from October 2025 to September 2026, it averaged 3.81%, with a high of 4.09% in September 2026 and a low of 3.67% in January 2026. In the last ten years the largest rise from one reading to the next was in July 2022, to 2.30% from 1.54% in June 2022, and the largest fall was in March 2020, to 0.30% from 1.54% in February 2020.
Among the last 9 complete years, the average was highest in 2023, at 5.28%, and lowest in 2021, at 0.04%.
Year by year
| Year | Average | Low | High | Last reading | Readings |
|---|---|---|---|---|---|
| 2026 | 3.79% | 3.67% | 4.09% | 4.09% September 2026 | 9 |
| 2025 | 4.21% | 3.68% | 4.42% | 3.68% December 2025 | 12 |
| 2024 | 5.18% | 4.39% | 5.51% | 4.39% December 2024 | 12 |
| 2023 | 5.28% | 4.69% | 5.60% | 5.44% December 2023 | 12 |
| 2022 | 2.08% | 0.15% | 4.36% | 4.36% December 2022 | 12 |
| 2021 | 0.04% | 0.02% | 0.08% | 0.06% December 2021 | 12 |
| 2020 | 0.37% | 0.09% | 1.55% | 0.09% December 2020 | 12 |
| 2019 | 2.10% | 1.57% | 2.45% | 1.57% December 2019 | 12 |
| 2018 | 1.97% | 1.43% | 2.41% | 2.41% December 2018 | 12 |
| 2017 | 0.95% | 0.52% | 1.34% | 1.34% December 2017 | 12 |
Averages, lows and highs are calculated by EconoMonitor from the published readings. Source: Board of Governors of the Federal Reserve System. EconoMonitor is not affiliated with or endorsed by the Federal Reserve.
How is it measured?
Monthly average of the 3-month Treasury constant maturity yield.
3-month Treasury yield (constant maturity) is published monthly by Board of Governors of the Federal Reserve System in its H.15 release. It is measured in percent. EconoMonitor holds all 249 readings since January 2006 under the publisher's code RIFLGFCM03_N.M, keeps earlier values when the publisher revises them, and compares each release with the downloaded file before it is shown.
- Frequency: monthly.
- Unit: percent.
- Release: H.15, published by Board of Governors of the Federal Reserve System.
- Source series code: RIFLGFCM03_N.M.
- Methodology: how EconoMonitor stores and checks this series.
Questions and sources
What is the latest reading of 3-month Treasury yield (constant maturity)?
4.09% in September 2026, as published by Board of Governors of the Federal Reserve System.
How often is it updated?
Monthly, with each H.15 release. EconoMonitor reloads the series after each release and keeps earlier values when the publisher revises them.
Where can I check it?
At the publisher: Federal Reserve Board Data Download Program, series code RIFLGFCM03_N.M.
Source: Board of Governors of the Federal Reserve System. EconoMonitor is not affiliated with or endorsed by the Federal Reserve. Checks for this release: Check A passed, Check B passed.
Data and analysis only, not financial advice. Data publishers do not endorse EconoMonitor. See the disclaimer and methodology.