Release: Interest Rate Spreads
Series is calculated as the spread between 3-Month LIBOR based on US dollars (https://fred.stlouisfed.org/series/USD3MTD156N) and 3-Month Treasury Bill (https://fred.stlouisfed.org/series/DTB3). The series is lagged by one week because the LIBOR series is lagged by one week due to an agreement with the source.
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.
Federal Reserve Bank of St. Louis, TED Spread [TEDRATE], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/TEDRATE, August 17, 2019.