6-month 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 6-month T-bill secondary-market rate stood at 3.73 percent on 29 September 2025, versus 3.74 on 26 September 2025.
Sample. There are 16,687 observations in the daily series shown in the figure above. The series covers the time range extending from December 1958 to September 2025.
History. Here's a peek at some simple statistics we computed on the whole sample: the interest rate had an average value of 4.49 percent; it hit a minimum of 0.02 on 26 August 2011; it reached a maximum of 15.93 on 21 May 1981.
Latest values
| Date | Value - Percentage points |
|---|---|
| 2025-09-25 | 3.75 |
| 2025-09-26 | 3.74 |
| 2025-09-29 | 3.73 |
Nugget of wisdom. One of the pluses of using our web site is that we publish accurate metadata. Check it below to learn more about the attributes of the indicators that you are exploring.
Not for investment purposes. Data series and other information provided on this web site are not not supposed to be used for investment purposes or as a basis for financial-decision making. Users should consult professional advice and do their own independent due diligence before taking any financial risk.
Series Metadata
| Field | Value |
|---|---|
| Description | 6-month 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 |