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 3.64 percent on 13 August 2026, compared to 3.62 on 12 August.
Sample. There are 6,261 records in the daily time series presented in the figure above. The series covers the time range extending from July 2001 to August 2026.
History. Check out a few statistics we computed on the whole sample: the interest rate had a mean value of 1.67 percent; it reached its maximum of 5.78 on 26 May 2023; it hit a trough of -0.04 on 25 March 2020.
Latest values
| Date | Value - Percentage points |
|---|---|
| 2026-08-11 | 3.64 |
| 2026-08-12 | 3.62 |
| 2026-08-13 | 3.64 |
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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
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 | 18138 | 1954-07-01 | 2026-08-13 |
Commercial paper
| Series Name | Observations | Start Date | End Date |
|---|---|---|---|
| 30-Day AA Nonfinancial Commercial Paper Interest Rate (percentage points) - United States - FED Board - Daily | 6967 | 1997-01-02 | 2026-08-13 |
| 60-Day AA Nonfinancial Commercial Paper Interest Rate (percentage points) - United States - FED Board - Daily | 6190 | 1997-01-02 | 2026-08-13 |
| 90-Day AA Nonfinancial Commercial Paper Interest Rate (percentage points) - United States - FED Board - Daily | 5295 | 1997-01-02 | 2026-08-13 |
| 30-Day AA Financial Commercial Paper Interest Rate (percentage points) - United States - FED Board - Daily | 6070 | 1997-01-02 | 2026-08-12 |
| 60-Day AA Financial Commercial Paper Interest Rate (percentage points) - United States - FED Board - Daily | 5776 | 1997-01-02 | 2026-08-05 |
| 90-Day AA Financial Commercial Paper Interest Rate (percentage points) - United States - FED Board - Daily | 6733 | 1997-01-02 | 2026-08-13 |
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 | 18103 | 1955-08-04 | 2026-08-13 |
Treasury bills
| Series Name | Observations | Start Date | End Date |
|---|---|---|---|
| 4-week Treasury bill secondary market rate (percentage points) - United States - FED Board - Daily | 6261 | 2001-07-31 | 2026-08-13 |
| 3-month Treasury bill secondary market rate (percentage points) - United States - FED Board - Daily | 18145 | 1954-01-04 | 2026-08-13 |
| 6-month Treasury bill secondary market rate (percentage points) - United States - FED Board - Daily | 16905 | 1958-12-09 | 2026-08-13 |
| 1-year Treasury bill secondary market rate (percentage points) - United States - FED Board - Daily | 15069 | 1959-07-15 | 2026-08-13 |