1-year Treasury bill secondary market rate (percentage points) - United States - FED Board - Daily
This series is part of the dataset: US money market rates (FED Board)
Download Full Dataset (.xlsx)Latest updates. In US money markets, the 1-year T-bill secondary-market rate was 3.52 percent on 29 September 2025, compared to 3.53 on 26 September 2025.
Sample. There are 14,851 data points overall in the daily time series presented in the plot above. The span of time covered by the series goes from July 1959 to September 2025.
History. Have a look at some descriptive statistics we calculated on the full sample: the interest rate hit a trough of 0.04 percent on 21 May 2021; it peaked at 15.21 on 3 September 1981; it averaged 4.74.
Latest values
| Date | Value - Percentage points |
|---|---|
| 2025-09-25 | 3.54 |
| 2025-09-26 | 3.53 |
| 2025-09-29 | 3.52 |
Heads-up. Our metadata often comprise links to the original sources of the data series we publish. You can use these links to find more details.
Not for investment purposes. Data series and other information shared on FetchSeries are not meant for investment purposes or as a basis for financial-decision making. Users should seek expert advice and perform independent analysis before pledging money to any investment.
Series Metadata
| Field | Value |
|---|---|
| Description | 1-year Treasury bill secondary market rate |
| Country | United States |
| Economic concept | Interest rate |
| Data type | Interest rate |
| Deflation method | Nominal |
| Seasonally adjusted | No |
| Rescaling | None |
| Frequency | Daily |
| Unit | Percentage points |
| Source | Board of Governors of the Federal Reserve System |
| Source type | Central bank |
| Data licence | Licence to copy and distribute without permission |
| Measure type | Level |
Series in the same data set: Fed funds
| Series Name | Observations | Start Date | End Date |
|---|---|---|---|
| Federal funds effective rate (percentage points) - United States - FED Board - Daily | 17919 | 1954-07-01 | 2025-09-29 |
Series in the same data set: Commercial paper
| Series Name | Observations | Start Date | End Date |
|---|---|---|---|
| 30-Day AA Nonfinancial Commercial Paper Interest Rate (percentage points) - United States - FED Board - Daily | 6775 | 1997-01-02 | 2025-09-29 |
| 60-Day AA Nonfinancial Commercial Paper Interest Rate (percentage points) - United States - FED Board - Daily | 6048 | 1997-01-02 | 2025-09-29 |
| 90-Day AA Nonfinancial Commercial Paper Interest Rate (percentage points) - United States - FED Board - Daily | 5214 | 1997-01-02 | 2025-09-26 |
| 30-Day AA Financial Commercial Paper Interest Rate (percentage points) - United States - FED Board - Daily | 6000 | 1997-01-02 | 2025-09-25 |
| 60-Day AA Financial Commercial Paper Interest Rate (percentage points) - United States - FED Board - Daily | 5732 | 1997-01-02 | 2025-09-29 |
| 90-Day AA Financial Commercial Paper Interest Rate (percentage points) - United States - FED Board - Daily | 6619 | 1997-01-02 | 2025-09-22 |
Series in the same data set: Prime bank rate
| Series Name | Observations | Start Date | End Date |
|---|---|---|---|
| Prime rate charged by banks on short-term loans to business (percentage points) - United States - FED Board - Weekly | 17878 | 1955-08-04 | 2025-09-29 |
Series in the same data set: Treasury bills
| Series Name | Observations | Start Date | End Date |
|---|---|---|---|
| 4-week Treasury bill secondary market rate (percentage points) - United States - FED Board - Daily | 6043 | 2001-07-31 | 2025-09-29 |
| 3-month Treasury bill secondary market rate (percentage points) - United States - FED Board - Daily | 17927 | 1954-01-04 | 2025-09-29 |
| 6-month Treasury bill secondary market rate (percentage points) - United States - FED Board - Daily | 16687 | 1958-12-09 | 2025-09-29 |
| 1-year Treasury bill secondary market rate (percentage points) - United States - FED Board - Daily | 14851 | 1959-07-15 | 2025-09-29 |