Observations

Dec 2025: -0.19

Updated: Jan 2, 2026 4:04 PM CST

Units:

Percent,

Not Seasonally Adjusted

Frequency:

Monthly

Notes

Title	Release Dates

1-Year Treasury Constant Maturity Minus Federal Funds Rate	2014-05-16	2026-01-02

Source

Federal Reserve Bank of St. Louis	2014-05-16	2026-01-02

Release

Interest Rate Spreads	2014-05-16	2026-01-02

Units

Percent	2014-05-16	2026-01-02

Frequency

Monthly	2014-05-16	2026-01-02

Seasonal Adjustment

Not Seasonally Adjusted	2014-05-16	2026-01-02

Notes

Series is calculated as the spread between 1-Year Treasury Constant Maturity (https://fred.stlouisfed.org/series/GS1) and Effective Federal Funds Rate (https://fred.stlouisfed.org/series/FEDFUNDS).	2014-05-16	2019-06-20
Series is calculated as the spread between 1-Year Treasury Constant Maturity (BC_1YEARM) 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	2026-01-02

1-Year Treasury Constant Maturity Minus Federal Funds Rate (T1YFFM)