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Title: 6-Month Treasury Bill Secondary Market Rate, Discount Basis Series ID: TB6MS Source: Board of Governors of the Federal Reserve System (US) Release: H.15 Selected Interest Rates Seasonal Adjustment: Not Seasonally Adjusted Frequency: Monthly Units: Percent Date Range: 1958-12-01 to 2024-04-01 Last Updated: 2024-05-01 3:18 PM CDT Notes: Averages of Business Days, Discount Basis DATE VALUE 1958-12-01 3.01 1959-01-01 3.09 1959-02-01 3.13 1959-03-01 3.13 1959-04-01 3.27 1959-05-01 3.33 1959-06-01 3.52 1959-07-01 3.82 1959-08-01 3.87 1959-09-01 4.70 1959-10-01 4.53 1959-11-01 4.54 1959-12-01 4.85 1960-01-01 4.74 1960-02-01 4.30 1960-03-01 3.61 1960-04-01 3.55 1960-05-01 3.58 1960-06-01 2.74 1960-07-01 2.71 1960-08-01 2.59 1960-09-01 2.83 1960-10-01 2.73 1960-11-01 2.66 1960-12-01 2.50 1961-01-01 2.47 1961-02-01 2.60 1961-03-01 2.54 1961-04-01 2.47 1961-05-01 2.45 1961-06-01 2.54 1961-07-01 2.45 1961-08-01 2.66 1961-09-01 2.68 1961-10-01 2.66 1961-11-01 2.70 1961-12-01 2.88 1962-01-01 2.94 1962-02-01 2.93 1962-03-01 2.87 1962-04-01 2.83 1962-05-01 2.78 1962-06-01 2.80 1962-07-01 3.08 1962-08-01 2.99 1962-09-01 2.93 1962-10-01 2.84 1962-11-01 2.89 1962-12-01 2.91 1963-01-01 2.96 1963-02-01 2.98 1963-03-01 2.95 1963-04-01 2.98 1963-05-01 3.01 1963-06-01 3.08 1963-07-01 3.31 1963-08-01 3.44 1963-09-01 3.50 1963-10-01 3.58 1963-11-01 3.65 1963-12-01 3.66 1964-01-01 3.64 1964-02-01 3.67 1964-03-01 3.72 1964-04-01 3.66 1964-05-01 3.60 1964-06-01 3.56 1964-07-01 3.56 1964-08-01 3.61 1964-09-01 3.68 1964-10-01 3.72 1964-11-01 3.81 1964-12-01 3.95 1965-01-01 3.94 1965-02-01 4.00 1965-03-01 4.00 1965-04-01 3.99 1965-05-01 3.95 1965-06-01 3.86 1965-07-01 3.90 1965-08-01 3.95 1965-09-01 4.07 1965-10-01 4.19 1965-11-01 4.24 1965-12-01 4.55 1966-01-01 4.71 1966-02-01 4.82 1966-03-01 4.78 1966-04-01 4.74 1966-05-01 4.81 1966-06-01 4.65 1966-07-01 4.93 1966-08-01 5.27 1966-09-01 5.79 1966-10-01 5.62 1966-11-01 5.54 1966-12-01 5.07 1967-01-01 4.74 1967-02-01 4.59 1967-03-01 4.22 1967-04-01 3.89 1967-05-01 3.80 1967-06-01 3.89 1967-07-01 4.72 1967-08-01 4.83 1967-09-01 4.96 1967-10-01 5.07 1967-11-01 5.25 1967-12-01 5.49 1968-01-01 5.24 1968-02-01 5.17 1968-03-01 5.33 1968-04-01 5.49 1968-05-01 5.83 1968-06-01 5.64 1968-07-01 5.41 1968-08-01 5.23 1968-09-01 5.25 1968-10-01 5.41 1968-11-01 5.60 1968-12-01 6.06 1969-01-01 6.28 1969-02-01 6.30 1969-03-01 6.16 1969-04-01 6.13 1969-05-01 6.15 1969-06-01 6.75 1969-07-01 7.24 1969-08-01 7.19 1969-09-01 7.32 1969-10-01 7.29 1969-11-01 7.62 1969-12-01 7.90 1970-01-01 7.78 1970-02-01 7.22 1970-03-01 6.58 1970-04-01 6.60 1970-05-01 7.02 1970-06-01 6.86 1970-07-01 6.51 1970-08-01 6.55 1970-09-01 6.46 1970-10-01 6.21 1970-11-01 5.42 1970-12-01 4.89 1971-01-01 4.47 1971-02-01 3.78 1971-03-01 3.50 1971-04-01 4.03 1971-05-01 4.36 1971-06-01 4.97 1971-07-01 5.63 1971-08-01 5.22 1971-09-01 4.97 1971-10-01 4.60 1971-11-01 4.38 1971-12-01 4.23 1972-01-01 3.66 1972-02-01 3.63 1972-03-01 4.12 1972-04-01 4.23 1972-05-01 4.12 1972-06-01 4.35 1972-07-01 4.50 1972-08-01 4.55 1972-09-01 5.13 1972-10-01 5.13 1972-11-01 5.09 1972-12-01 5.30 1973-01-01 5.62 1973-02-01 5.83 1973-03-01 6.51 1973-04-01 6.52 1973-05-01 6.62 1973-06-01 7.23 1973-07-01 8.12 1973-08-01 8.65 1973-09-01 8.45 1973-10-01 7.32 1973-11-01 7.96 1973-12-01 7.56 1974-01-01 7.65 1974-02-01 6.96 1974-03-01 7.83 1974-04-01 8.32 1974-05-01 8.40 1974-06-01 8.12 1974-07-01 7.94 1974-08-01 9.11 1974-09-01 8.53 1974-10-01 7.74 1974-11-01 7.52 1974-12-01 7.11 1975-01-01 6.36 1975-02-01 5.62 1975-03-01 5.62 1975-04-01 6.00 1975-05-01 5.59 1975-06-01 5.61 1975-07-01 6.50 1975-08-01 6.94 1975-09-01 6.92 1975-10-01 6.25 1975-11-01 5.80 1975-12-01 5.85 1976-01-01 5.14 1976-02-01 5.20 1976-03-01 5.44 1976-04-01 5.18 1976-05-01 5.62 1976-06-01 5.77 1976-07-01 5.53 1976-08-01 5.40 1976-09-01 5.30 1976-10-01 5.06 1976-11-01 4.88 1976-12-01 4.51 1977-01-01 4.83 1977-02-01 4.90 1977-03-01 4.88 1977-04-01 4.80 1977-05-01 5.20 1977-06-01 5.21 1977-07-01 5.40 1977-08-01 5.83 1977-09-01 6.04 1977-10-01 6.43 1977-11-01 6.41 1977-12-01 6.40 1978-01-01 6.70 1978-02-01 6.74 1978-03-01 6.63 1978-04-01 6.73 1978-05-01 7.02 1978-06-01 7.23 1978-07-01 7.44 1978-08-01 7.37 1978-09-01 7.99 1978-10-01 8.55 1978-11-01 9.24 1978-12-01 9.36 1979-01-01 9.47 1979-02-01 9.41 1979-03-01 9.47 1979-04-01 9.49 1979-05-01 9.54 1979-06-01 9.06 1979-07-01 9.24 1979-08-01 9.49 1979-09-01 10.20 1979-10-01 11.66 1979-11-01 11.82 1979-12-01 11.84 1980-01-01 11.84 1980-02-01 12.86 1980-03-01 15.03 1980-04-01 12.88 1980-05-01 8.65 1980-06-01 7.30 1980-07-01 8.06 1980-08-01 9.41 1980-09-01 10.57 1980-10-01 11.63 1980-11-01 13.50 1980-12-01 14.64 1981-01-01 14.08 1981-02-01 14.05 1981-03-01 12.81 1981-04-01 13.45 1981-05-01 15.29 1981-06-01 14.09 1981-07-01 14.74 1981-08-01 15.52 1981-09-01 14.92 1981-10-01 13.82 1981-11-01 11.30 1981-12-01 11.52 1982-01-01 12.83 1982-02-01 13.61 1982-03-01 12.77 1982-04-01 12.80 1982-05-01 12.16 1982-06-01 12.70 1982-07-01 11.88 1982-08-01 9.88 1982-09-01 9.37 1982-10-01 8.29 1982-11-01 8.34 1982-12-01 8.16 1983-01-01 7.93 1983-02-01 8.23 1983-03-01 8.37 1983-04-01 8.30 1983-05-01 8.22 1983-06-01 8.89 1983-07-01 9.26 1983-08-01 9.51 1983-09-01 9.15 1983-10-01 8.83 1983-11-01 8.93 1983-12-01 9.17 1984-01-01 9.01 1984-02-01 9.18 1984-03-01 9.66 1984-04-01 9.84 1984-05-01 10.31 1984-06-01 10.51 1984-07-01 10.52 1984-08-01 10.61 1984-09-01 10.47 1984-10-01 9.87 1984-11-01 8.81 1984-12-01 8.28 1985-01-01 8.00 1985-02-01 8.39 1985-03-01 8.90 1985-04-01 8.23 1985-05-01 7.65 1985-06-01 7.09 1985-07-01 7.20 1985-08-01 7.32 1985-09-01 7.27 1985-10-01 7.33 1985-11-01 7.30 1985-12-01 7.14 1986-01-01 7.16 1986-02-01 7.11 1986-03-01 6.57 1986-04-01 6.08 1986-05-01 6.19 1986-06-01 6.27 1986-07-01 5.86 1986-08-01 5.55 1986-09-01 5.35 1986-10-01 5.26 1986-11-01 5.41 1986-12-01 5.55 1987-01-01 5.44 1987-02-01 5.59 1987-03-01 5.60 1987-04-01 5.90 1987-05-01 6.05 1987-06-01 5.99 1987-07-01 5.76 1987-08-01 6.15 1987-09-01 6.64 1987-10-01 6.69 1987-11-01 6.19 1987-12-01 6.36 1988-01-01 6.25 1988-02-01 5.93 1988-03-01 5.91 1988-04-01 6.21 1988-05-01 6.56 1988-06-01 6.71 1988-07-01 6.99 1988-08-01 7.39 1988-09-01 7.43 1988-10-01 7.50 1988-11-01 7.86 1988-12-01 8.22 1989-01-01 8.36 1989-02-01 8.55 1989-03-01 8.85 1989-04-01 8.65 1989-05-01 8.41 1989-06-01 7.93 1989-07-01 7.61 1989-08-01 7.74 1989-09-01 7.74 1989-10-01 7.62 1989-11-01 7.49 1989-12-01 7.42 1990-01-01 7.55 1990-02-01 7.70 1990-03-01 7.85 1990-04-01 7.84 1990-05-01 7.76 1990-06-01 7.63 1990-07-01 7.52 1990-08-01 7.38 1990-09-01 7.32 1990-10-01 7.16 1990-11-01 7.03 1990-12-01 6.70 1991-01-01 6.28 1991-02-01 5.93 1991-03-01 5.92 1991-04-01 5.71 1991-05-01 5.61 1991-06-01 5.75 1991-07-01 5.70 1991-08-01 5.39 1991-09-01 5.25 1991-10-01 5.04 1991-11-01 4.61 1991-12-01 4.10 1992-01-01 3.87 1992-02-01 3.93 1992-03-01 4.18 1992-04-01 3.87 1992-05-01 3.75 1992-06-01 3.77 1992-07-01 3.28 1992-08-01 3.21 1992-09-01 2.96 1992-10-01 3.04 1992-11-01 3.34 1992-12-01 3.36 1993-01-01 3.14 1993-02-01 3.07 1993-03-01 3.05 1993-04-01 2.97 1993-05-01 3.07 1993-06-01 3.20 1993-07-01 3.16 1993-08-01 3.14 1993-09-01 3.06 1993-10-01 3.12 1993-11-01 3.26 1993-12-01 3.23 1994-01-01 3.15 1994-02-01 3.43 1994-03-01 3.78 1994-04-01 4.09 1994-05-01 4.60 1994-06-01 4.55 1994-07-01 4.75 1994-08-01 4.88 1994-09-01 5.04 1994-10-01 5.39 1994-11-01 5.72 1994-12-01 6.21 1995-01-01 6.21 1995-02-01 6.03 1995-03-01 5.89 1995-04-01 5.77 1995-05-01 5.67 1995-06-01 5.42 1995-07-01 5.37 1995-08-01 5.41 1995-09-01 5.30 1995-10-01 5.32 1995-11-01 5.27 1995-12-01 5.13 1996-01-01 4.92 1996-02-01 4.77 1996-03-01 4.96 1996-04-01 5.06 1996-05-01 5.12 1996-06-01 5.25 1996-07-01 5.30 1996-08-01 5.13 1996-09-01 5.24 1996-10-01 5.11 1996-11-01 5.07 1996-12-01 5.04 1997-01-01 5.10 1997-02-01 5.06 1997-03-01 5.26 1997-04-01 5.37 1997-05-01 5.30 1997-06-01 5.13 1997-07-01 5.12 1997-08-01 5.19 1997-09-01 5.09 1997-10-01 5.09 1997-11-01 5.17 1997-12-01 5.24 1998-01-01 5.03 1998-02-01 5.07 1998-03-01 5.04 1998-04-01 5.06 1998-05-01 5.14 1998-06-01 5.12 1998-07-01 5.03 1998-08-01 4.95 1998-09-01 4.63 1998-10-01 4.05 1998-11-01 4.42 1998-12-01 4.40 1999-01-01 4.33 1999-02-01 4.44 1999-03-01 4.47 1999-04-01 4.37 1999-05-01 4.56 1999-06-01 4.82 1999-07-01 4.58 1999-08-01 4.87 1999-09-01 4.88 1999-10-01 4.98 1999-11-01 5.20 1999-12-01 5.44 2000-01-01 5.50 2000-02-01 5.72 2000-03-01 5.85 2000-04-01 5.81 2000-05-01 6.10 2000-06-01 5.97 2000-07-01 6.00 2000-08-01 6.07 2000-09-01 5.98 2000-10-01 6.04 2000-11-01 6.06 2000-12-01 5.68 2001-01-01 4.95 2001-02-01 4.71 2001-03-01 4.28 2001-04-01 3.85 2001-05-01 3.62 2001-06-01 3.45 2001-07-01 3.45 2001-08-01 3.29 2001-09-01 2.63 2001-10-01 2.12 2001-11-01 1.88 2001-12-01 1.78 2002-01-01 1.73 2002-02-01 1.82 2002-03-01 2.00 2002-04-01 1.92 2002-05-01 1.86 2002-06-01 1.79 2002-07-01 1.69 2002-08-01 1.60 2002-09-01 1.60 2002-10-01 1.56 2002-11-01 1.27 2002-12-01 1.24 2003-01-01 1.20 2003-02-01 1.18 2003-03-01 1.13 2003-04-01 1.14 2003-05-01 1.08 2003-06-01 0.92 2003-07-01 0.95 2003-08-01 1.03 2003-09-01 1.01 2003-10-01 1.00 2003-11-01 1.02 2003-12-01 0.99 2004-01-01 0.97 2004-02-01 0.99 2004-03-01 0.99 2004-04-01 1.09 2004-05-01 1.31 2004-06-01 1.60 2004-07-01 1.66 2004-08-01 1.72 2004-09-01 1.87 2004-10-01 2.00 2004-11-01 2.27 2004-12-01 2.43 2005-01-01 2.61 2005-02-01 2.77 2005-03-01 3.00 2005-04-01 3.05 2005-05-01 3.08 2005-06-01 3.13 2005-07-01 3.42 2005-08-01 3.66 2005-09-01 3.67 2005-10-01 3.99 2005-11-01 4.15 2005-12-01 4.18 2006-01-01 4.31 2006-02-01 4.52 2006-03-01 4.62 2006-04-01 4.72 2006-05-01 4.82 2006-06-01 4.97 2006-07-01 5.06 2006-08-01 4.97 2006-09-01 4.89 2006-10-01 4.92 2006-11-01 4.95 2006-12-01 4.88 2007-01-01 4.95 2007-02-01 4.96 2007-03-01 4.89 2007-04-01 4.86 2007-05-01 4.78 2007-06-01 4.76 2007-07-01 4.83 2007-08-01 4.38 2007-09-01 4.05 2007-10-01 4.01 2007-11-01 3.46 2007-12-01 3.23 2008-01-01 2.75 2008-02-01 2.04 2008-03-01 1.48 2008-04-01 1.55 2008-05-01 1.82 2008-06-01 2.13 2008-07-01 1.93 2008-08-01 1.92 2008-09-01 1.61 2008-10-01 1.20 2008-11-01 0.73 2008-12-01 0.26 2009-01-01 0.30 2009-02-01 0.45 2009-03-01 0.42 2009-04-01 0.35 2009-05-01 0.30 2009-06-01 0.31 2009-07-01 0.27 2009-08-01 0.26 2009-09-01 0.21 2009-10-01 0.16 2009-11-01 0.15 2009-12-01 0.17 2010-01-01 0.15 2010-02-01 0.18 2010-03-01 0.22 2010-04-01 0.24 2010-05-01 0.22 2010-06-01 0.19 2010-07-01 0.20 2010-08-01 0.19 2010-09-01 0.19 2010-10-01 0.18 2010-11-01 0.18 2010-12-01 0.19 2011-01-01 0.18 2011-02-01 0.17 2011-03-01 0.16 2011-04-01 0.12 2011-05-01 0.09 2011-06-01 0.10 2011-07-01 0.08 2011-08-01 0.06 2011-09-01 0.04 2011-10-01 0.05 2011-11-01 0.05 2011-12-01 0.05 2012-01-01 0.07 2012-02-01 0.12 2012-03-01 0.14 2012-04-01 0.14 2012-05-01 0.15 2012-06-01 0.15 2012-07-01 0.15 2012-08-01 0.14 2012-09-01 0.14 2012-10-01 0.15 2012-11-01 0.14 2012-12-01 0.12 2013-01-01 0.11 2013-02-01 0.12 2013-03-01 0.11 2013-04-01 0.09 2013-05-01 0.08 2013-06-01 0.09 2013-07-01 0.07 2013-08-01 0.07 2013-09-01 0.04 2013-10-01 0.08 2013-11-01 0.10 2013-12-01 0.10 2014-01-01 0.07 2014-02-01 0.08 2014-03-01 0.08 2014-04-01 0.05 2014-05-01 0.05 2014-06-01 0.06 2014-07-01 0.06 2014-08-01 0.05 2014-09-01 0.04 2014-10-01 0.05 2014-11-01 0.07 2014-12-01 0.11 2015-01-01 0.08 2015-02-01 0.07 2015-03-01 0.11 2015-04-01 0.09 2015-05-01 0.08 2015-06-01 0.09 2015-07-01 0.12 2015-08-01 0.22 2015-09-01 0.18 2015-10-01 0.11 2015-11-01 0.32 2015-12-01 0.49 2016-01-01 0.43 2016-02-01 0.44 2016-03-01 0.46 2016-04-01 0.37 2016-05-01 0.41 2016-06-01 0.40 2016-07-01 0.39 2016-08-01 0.44 2016-09-01 0.46 2016-10-01 0.47 2016-11-01 0.57 2016-12-01 0.63 2017-01-01 0.61 2017-02-01 0.64 2017-03-01 0.87 2017-04-01 0.93 2017-05-01 1.02 2017-06-01 1.09 2017-07-01 1.11 2017-08-01 1.11 2017-09-01 1.15 2017-10-01 1.23 2017-11-01 1.36 2017-12-01 1.47 2018-01-01 1.59 2018-02-01 1.75 2018-03-01 1.87 2018-04-01 1.93 2018-05-01 2.02 2018-06-01 2.06 2018-07-01 2.11 2018-08-01 2.19 2018-09-01 2.29 2018-10-01 2.40 2018-11-01 2.46 2018-12-01 2.48 2019-01-01 2.45 2019-02-01 2.44 2019-03-01 2.44 2019-04-01 2.39 2019-05-01 2.35 2019-06-01 2.11 2019-07-01 2.03 2019-08-01 1.88 2019-09-01 1.84 2019-10-01 1.62 2019-11-01 1.55 2019-12-01 1.54 2020-01-01 1.52 2020-02-01 1.47 2020-03-01 0.29 2020-04-01 0.17 2020-05-01 0.15 2020-06-01 0.18 2020-07-01 0.14 2020-08-01 0.12 2020-09-01 0.12 2020-10-01 0.11 2020-11-01 0.10 2020-12-01 0.09 2021-01-01 0.09 2021-02-01 0.06 2021-03-01 0.05 2021-04-01 0.04 2021-05-01 0.04 2021-06-01 0.05 2021-07-01 0.05 2021-08-01 0.06 2021-09-01 0.05 2021-10-01 0.06 2021-11-01 0.07 2021-12-01 0.15 2022-01-01 0.33 2022-02-01 0.64 2022-03-01 0.83 2022-04-01 1.23 2022-05-01 1.45 2022-06-01 2.11 2022-07-01 2.76 2022-08-01 3.05 2022-09-01 3.63 2022-10-01 4.18 2022-11-01 4.48 2022-12-01 4.55 2023-01-01 4.67 2023-02-01 4.81 2023-03-01 4.77 2023-04-01 4.79 2023-05-01 5.03 2023-06-01 5.19 2023-07-01 5.27 2023-08-01 5.28 2023-09-01 5.31 2023-10-01 5.33 2023-11-01 5.24 2023-12-01 5.12 2024-01-01 5.02 2024-02-01 5.09 2024-03-01 5.11 2024-04-01 5.15