Observations

Sep 2026: 0.19

Updated: Oct 1, 2026 4:03 PM CDT

Units:

Percent,

Not Seasonally Adjusted

Frequency:

Monthly

Notes

Title	Release Dates

3-Month Treasury Bill Minus Federal Funds Rate	2014-06-19	2026-10-01

Source

Federal Reserve Bank of St. Louis	2014-06-19	2026-10-01

Release

Interest Rate Spreads	2014-06-19	2026-10-01

Units

Percent	2014-06-19	2026-10-01

Frequency

Monthly	2014-06-19	2026-10-01

Seasonal Adjustment

Not Seasonally Adjusted	2014-06-19	2026-10-01

Notes

Series is calculated as the spread between 3-Month Treasury Bill: Secondary Market Rate (https://fred.stlouisfed.org/series/TB3MS) and Effective Federal Funds Rate (https://fred.stlouisfed.org/series/FEDFUNDS).	2014-06-19	2019-06-20
Series is calculated as the spread between 3-Month Treasury Bill: Secondary Market Rate (ROUND_B1_CLOSE_13WK_2M)) and Effective Federal Funds Rate (https://fred.stlouisfed.org/series/EFFRM). Starting with the update on June 21, 2019, the Treasury bond data used in calculating interest rate spreads is obtained directly from the U.S. Treasury Department (https://www.treasury.gov/resource-center/data-chart-center/interest-rates/Pages/TextView.aspx?data=yield).	2019-06-21	2026-10-01

3-Month Treasury Bill Minus Federal Funds Rate (TB3SMFFM)