Daily
Index (no units)
1962 - 2026
Jan 2, 1962 to Feb 26, 2026
FRED
2 days ago
FreshFeb 27, 2026
Series is calculated as the spread between 10-Year Treasury Constant Maturity (BC_10YEAR) and Effective Federal Funds Rate (https://fred.stlouisfed.org/series/EFFR). 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).
As of February 26, 2026 • Daily data • Source: FRED
This dataset contains 16,020 daily observations, over 64 years, 1 months, updated daily from FRED. View Methodology
Data Points
16,020
Coverage
64 years, 1 months
Updates
daily