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 4.18 percent on 17 September 2026, compared to 4.23 on the previous day.
Sample. In the daily time series plotted above, there are 15,093 observations. The time span covered by the series goes from July 1959 to September 2026.
History. Here's a snapshot of some statistics calculated on the entire sample: the interest rate reached a minimum of 0.04 percent on 21 May 2021; it recorded its highest level of 15.21 on 3 September 1981; it had an average value of 4.72.
Latest values
| Date | Value - Percentage points |
|---|---|
| 2026-09-15 | 4.17000 |
| 2026-09-16 | 4.23000 |
| 2026-09-17 | 4.18000 |
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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
Discover the other time series included in this data set.
Fed funds
| Series Name | Observations | Start Date | End Date |
|---|---|---|---|
| Federal funds effective rate (percentage points) - United States - FED Board - Daily | 18162 | 1954-07-01 | 2026-09-17 |
Commercial paper
| Series Name | Observations | Start Date | End Date |
|---|---|---|---|
| 30-Day AA Nonfinancial Commercial Paper Interest Rate (percentage points) - United States - FED Board - Daily | 6990 | 1997-01-02 | 2026-09-17 |
| 60-Day AA Nonfinancial Commercial Paper Interest Rate (percentage points) - United States - FED Board - Daily | 6209 | 1997-01-02 | 2026-09-17 |
| 90-Day AA Nonfinancial Commercial Paper Interest Rate (percentage points) - United States - FED Board - Daily | 5304 | 1997-01-02 | 2026-09-17 |
| 30-Day AA Financial Commercial Paper Interest Rate (percentage points) - United States - FED Board - Daily | 6072 | 1997-01-02 | 2026-09-04 |
| 60-Day AA Financial Commercial Paper Interest Rate (percentage points) - United States - FED Board - Daily | 5780 | 1997-01-02 | 2026-09-09 |
| 90-Day AA Financial Commercial Paper Interest Rate (percentage points) - United States - FED Board - Daily | 6747 | 1997-01-02 | 2026-09-11 |
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 | 18128 | 1955-08-04 | 2026-09-17 |
Treasury bills
| Series Name | Observations | Start Date | End Date |
|---|---|---|---|
| 4-week Treasury bill secondary market rate (percentage points) - United States - FED Board - Daily | 6285 | 2001-07-31 | 2026-09-17 |
| 3-month Treasury bill secondary market rate (percentage points) - United States - FED Board - Daily | 18169 | 1954-01-04 | 2026-09-17 |
| 6-month Treasury bill secondary market rate (percentage points) - United States - FED Board - Daily | 16929 | 1958-12-09 | 2026-09-17 |
| 1-year Treasury bill secondary market rate (percentage points) - United States - FED Board - Daily | 15093 | 1959-07-15 | 2026-09-17 |