Monthly
%
1958 - 2026
Dec 1, 1958 to Feb 1, 2026
FRED
3 weeks ago
RecentMay 1, 2026
Series is calculated as the spread between 6-Month Treasury Bill: Secondary Market Rate (https://fred.stlouisfed.org/series/TB6MS) and Effective Federal Funds Rate (https://fred.stlouisfed.org/series/FEDFUNDS).
As of February 1, 2026 • M data • Source: FRED
This dataset contains 807 monthly observations, over 67 years, 4 months, updated monthly from FRED. View Methodology
Data Points
807
Coverage
67 years, 4 months
Updates
monthly
This dataset's metadata was updated on 5/7/2026. The current data may be outdated.