4-week 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 4-week T-bill secondary-market rate was 4.06 percent on 29 September 2025, compared to 4.07 on 26 September 2025.
Sample. In this daily time series, there are 6,043 observations. The series covers the period going from July 2001 to September 2025.
History. Here are a few statistics we calculated on the full sample: the interest rate hit a trough of -0.04 percent on 25 March 2020; it hit a maximum of 5.78 on 26 May 2023; it had a mean value of 1.60.
Latest values
| Date | Value - Percentage points |
|---|---|
| 2025-09-25 | 4.08 |
| 2025-09-26 | 4.07 |
| 2025-09-29 | 4.06 |
Nugget of wisdom. To simplify research, we group indicators into data sets and worksheets. By moving down the page, you will discover how we structured further material related to the statistics published here.
Not for investment purposes. Data accessible on this web site are not meant for investment purposes or as a basis for financial-decision making. Users should seek expert advice and do their own independent due diligence before pledging money to any investment.
Series Metadata
| Field | Value |
|---|---|
| Description | 4-week 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 |