Title: 1-Year Treasury Bill: Secondary Market Rate Series ID: TB1YR Source: Board of Governors of the Federal Reserve System Release: H.15 Selected Interest Rates Seasonal Adjustment: Not Seasonally Adjusted Frequency: Monthly Units: Percent Date Range: 1959-07-01 to 2012-04-01 Last Updated: 2012-05-07 4:01 PM CDT Notes: Averages of Business Days, Discount Basis DATE VALUE 1959-07-01 4.34 1959-08-01 4.31 1959-09-01 4.83 1959-10-01 4.69 1959-11-01 4.54 1959-12-01 4.99 1960-01-01 4.95 1960-02-01 4.45 1960-03-01 3.68 1960-04-01 3.83 1960-05-01 4.01 1960-06-01 3.10 1960-07-01 3.03 1960-08-01 2.82 1960-09-01 2.86 1960-10-01 2.92 1960-11-01 2.87 1960-12-01 2.64 1961-01-01 2.63 1961-02-01 2.75 1961-03-01 2.76 1961-04-01 2.74 1961-05-01 2.72 1961-06-01 2.80 1961-07-01 2.79 1961-08-01 2.91 1961-09-01 2.88 1961-10-01 2.90 1961-11-01 2.90 1961-12-01 2.97 1962-01-01 3.19 1962-02-01 3.21 1962-03-01 2.98 1962-04-01 2.90 1962-05-01 2.91 1962-06-01 2.89 1962-07-01 3.17 1962-08-01 3.10 1962-09-01 2.99 1962-10-01 2.90 1962-11-01 2.94 1962-12-01 2.94 1963-01-01 3.00 1963-02-01 3.00 1963-03-01 2.97 1963-04-01 3.03 1963-05-01 3.06 1963-06-01 3.11 1963-07-01 3.40 1963-08-01 3.50 1963-09-01 3.57 1963-10-01 3.61 1963-11-01 3.67 1963-12-01 3.69 1964-01-01 3.68 1964-02-01 3.71 1964-03-01 3.78 1964-04-01 3.75 1964-05-01 3.71 1964-06-01 3.70 1964-07-01 3.64 1964-08-01 3.67 1964-09-01 3.73 1964-10-01 3.79 1964-11-01 3.86 1964-12-01 3.96 1965-01-01 3.91 1965-02-01 4.00 1965-03-01 4.02 1965-04-01 4.00 1965-05-01 3.96 1965-06-01 3.89 1965-07-01 3.89 1965-08-01 3.96 1965-09-01 4.09 1965-10-01 4.16 1965-11-01 4.23 1965-12-01 4.56 1966-01-01 4.69 1966-02-01 4.81 1966-03-01 4.81 1966-04-01 4.76 1966-05-01 4.85 1966-06-01 4.78 1966-07-01 4.94 1966-08-01 5.34 1966-09-01 5.80 1966-10-01 5.52 1966-11-01 5.49 1966-12-01 5.00 1967-01-01 4.61 1967-02-01 4.57 1967-03-01 4.19 1967-04-01 3.90 1967-05-01 3.89 1967-06-01 4.16 1967-07-01 4.90 1967-08-01 5.05 1967-09-01 5.10 1967-10-01 5.22 1967-11-01 5.39 1967-12-01 5.59 1968-01-01 5.30 1968-02-01 5.24 1968-03-01 5.42 1968-04-01 5.47 1968-05-01 5.84 1968-06-01 5.68 1968-07-01 5.39 1968-08-01 5.15 1968-09-01 5.18 1968-10-01 5.33 1968-11-01 5.51 1968-12-01 5.97 1969-01-01 6.07 1969-02-01 6.21 1969-03-01 6.20 1969-04-01 6.04 1969-05-01 6.11 1969-06-01 6.88 1969-07-01 7.19 1969-08-01 7.28 1969-09-01 7.35 1969-10-01 7.21 1969-11-01 7.36 1969-12-01 7.61 1970-01-01 7.51 1970-02-01 7.05 1970-03-01 6.50 1970-04-01 6.53 1970-05-01 7.12 1970-06-01 7.07 1970-07-01 6.62 1970-08-01 6.55 1970-09-01 6.39 1970-10-01 6.23 1970-11-01 5.39 1970-12-01 4.84 1971-01-01 4.40 1971-02-01 3.84 1971-03-01 3.60 1971-04-01 4.09 1971-05-01 4.64 1971-06-01 5.33 1971-07-01 5.74 1971-08-01 5.52 1971-09-01 5.19 1971-10-01 4.75 1971-11-01 4.49 1971-12-01 4.39 1972-01-01 3.82 1972-02-01 4.06 1972-03-01 4.43 1972-04-01 4.65 1972-05-01 4.46 1972-06-01 4.71 1972-07-01 4.90 1972-08-01 4.90 1972-09-01 5.44 1972-10-01 5.39 1972-11-01 5.20 1972-12-01 5.28 1973-01-01 5.58 1973-02-01 5.93 1973-03-01 6.53 1973-04-01 6.51 1973-05-01 6.63 1973-06-01 7.05 1973-07-01 7.97 1973-08-01 8.32 1973-09-01 8.07 1973-10-01 7.17 1973-11-01 7.40 1973-12-01 7.01 1974-01-01 7.01 1974-02-01 6.51 1974-03-01 7.34 1974-04-01 8.08 1974-05-01 8.21 1974-06-01 8.16 1974-07-01 8.04 1974-08-01 8.88 1974-09-01 8.52 1974-10-01 7.59 1974-11-01 7.29 1974-12-01 6.79 1975-01-01 6.27 1975-02-01 5.56 1975-03-01 5.70 1975-04-01 6.40 1975-05-01 5.91 1975-06-01 5.86 1975-07-01 6.64 1975-08-01 7.16 1975-09-01 7.20 1975-10-01 6.48 1975-11-01 6.07 1975-12-01 6.16 1976-01-01 5.44 1976-02-01 5.53 1976-03-01 5.82 1976-04-01 5.54 1976-05-01 5.98 1976-06-01 6.12 1976-07-01 5.82 1976-08-01 5.64 1976-09-01 5.50 1976-10-01 5.19 1976-11-01 5.00 1976-12-01 4.64 1977-01-01 5.00 1977-02-01 5.16 1977-03-01 5.19 1977-04-01 5.10 1977-05-01 5.43 1977-06-01 5.41 1977-07-01 5.57 1977-08-01 5.97 1977-09-01 6.13 1977-10-01 6.52 1977-11-01 6.52 1977-12-01 6.52 1978-01-01 6.80 1978-02-01 6.86 1978-03-01 6.82 1978-04-01 6.96 1978-05-01 7.28 1978-06-01 7.53 1978-07-01 7.79 1978-08-01 7.73 1978-09-01 8.01 1978-10-01 8.45 1978-11-01 9.20 1978-12-01 9.44 1979-01-01 9.54 1979-02-01 9.39 1979-03-01 9.38 1979-04-01 9.28 1979-05-01 9.27 1979-06-01 8.81 1979-07-01 8.87 1979-08-01 9.16 1979-09-01 9.89 1979-10-01 11.23 1979-11-01 11.22 1979-12-01 10.92 1980-01-01 10.96 1980-02-01 12.46 1980-03-01 14.03 1980-04-01 11.97 1980-05-01 8.66 1980-06-01 7.54 1980-07-01 8.00 1980-08-01 9.39 1980-09-01 10.48 1980-10-01 11.30 1980-11-01 12.66 1980-12-01 13.23 1981-01-01 12.62 1981-02-01 12.99 1981-03-01 12.28 1981-04-01 12.79 1981-05-01 14.29 1981-06-01 13.22 1981-07-01 13.91 1981-08-01 14.70 1981-09-01 14.53 1981-10-01 13.62 1981-11-01 11.20 1981-12-01 11.57 1982-01-01 12.77 1982-02-01 13.11 1982-03-01 12.47 1982-04-01 12.50 1982-05-01 11.98 1982-06-01 12.57 1982-07-01 11.90 1982-08-01 10.37 1982-09-01 9.92 1982-10-01 8.63 1982-11-01 8.44 1982-12-01 8.23 1983-01-01 8.01 1983-02-01 8.28 1983-03-01 8.36 1983-04-01 8.29 1983-05-01 8.23 1983-06-01 8.87 1983-07-01 9.34 1983-08-01 9.60 1983-09-01 9.27 1983-10-01 8.98 1983-11-01 9.08 1983-12-01 9.24 1984-01-01 9.07 1984-02-01 9.20 1984-03-01 9.67 1984-04-01 9.95 1984-05-01 10.57 1984-06-01 10.93 1984-07-01 10.89 1984-08-01 10.71 1984-09-01 10.51 1984-10-01 9.93 1984-11-01 9.01 1984-12-01 8.60 1985-01-01 8.33 1985-02-01 8.56 1985-03-01 9.06 1985-04-01 8.44 1985-05-01 7.85 1985-06-01 7.27 1985-07-01 7.31 1985-08-01 7.48 1985-09-01 7.50 1985-10-01 7.45 1985-11-01 7.33 1985-12-01 7.16 1986-01-01 7.21 1986-02-01 7.11 1986-03-01 6.59 1986-04-01 6.06 1986-05-01 6.25 1986-06-01 6.32 1986-07-01 5.90 1986-08-01 5.60 1986-09-01 5.45 1986-10-01 5.41 1986-11-01 5.48 1986-12-01 5.55 1987-01-01 5.46 1987-02-01 5.63 1987-03-01 5.68 1987-04-01 6.09 1987-05-01 6.52 1987-06-01 6.35 1987-07-01 6.24 1987-08-01 6.54 1987-09-01 7.11 1987-10-01 7.05 1987-11-01 6.50 1987-12-01 6.69 1988-01-01 6.52 1988-02-01 6.21 1988-03-01 6.28 1988-04-01 6.56 1988-05-01 6.90 1988-06-01 6.99 1988-07-01 7.22 1988-08-01 7.59 1988-09-01 7.53 1988-10-01 7.54 1988-11-01 7.87 1988-12-01 8.32 1989-01-01 8.37 1989-02-01 8.55 1989-03-01 8.82 1989-04-01 8.64 1989-05-01 8.31 1989-06-01 7.84 1989-07-01 7.36 1989-08-01 7.61 1989-09-01 7.65 1989-10-01 7.45 1989-11-01 7.25 1989-12-01 7.21 1990-01-01 7.38 1990-02-01 7.55 1990-03-01 7.76 1990-04-01 7.80 1990-05-01 7.73 1990-06-01 7.53 1990-07-01 7.40 1990-08-01 7.26 1990-09-01 7.24 1990-10-01 7.06 1990-11-01 6.85 1990-12-01 6.61 1991-01-01 6.25 1991-02-01 5.91 1991-03-01 6.00 1991-04-01 5.85 1991-05-01 5.76 1991-06-01 5.96 1991-07-01 5.91 1991-08-01 5.45 1991-09-01 5.26 1991-10-01 5.04 1991-11-01 4.64 1991-12-01 4.17 1992-01-01 3.95 1992-02-01 4.08 1992-03-01 4.40 1992-04-01 4.09 1992-05-01 3.99 1992-06-01 3.98 1992-07-01 3.45 1992-08-01 3.33 1992-09-01 3.06 1992-10-01 3.17 1992-11-01 3.52 1992-12-01 3.55 1993-01-01 3.35 1993-02-01 3.25 1993-03-01 3.20 1993-04-01 3.11 1993-05-01 3.23 1993-06-01 3.39 1993-07-01 3.33 1993-08-01 3.30 1993-09-01 3.22 1993-10-01 3.25 1993-11-01 3.42 1993-12-01 3.45 1994-01-01 3.39 1994-02-01 3.69 1994-03-01 4.11 1994-04-01 4.57 1994-05-01 5.03 1994-06-01 4.98 1994-07-01 5.17 1994-08-01 5.25 1994-09-01 5.43 1994-10-01 5.75 1994-11-01 6.13 1994-12-01 6.67 1995-01-01 6.59 1995-02-01 6.28 1995-03-01 6.03 1995-04-01 5.88 1995-05-01 5.65 1995-06-01 5.33 1995-07-01 5.28 1995-08-01 5.43 1995-09-01 5.31 1995-10-01 5.28 1995-11-01 5.14 1995-12-01 5.03 1996-01-01 4.82 1996-02-01 4.69 1996-03-01 5.06 1996-04-01 5.23 1996-05-01 5.33 1996-06-01 5.48 1996-07-01 5.52 1996-08-01 5.35 1996-09-01 5.50 1996-10-01 5.25 1996-11-01 5.14 1996-12-01 5.18 1997-01-01 5.30 1997-02-01 5.23 1997-03-01 5.47 1997-04-01 5.64 1997-05-01 5.54 1997-06-01 5.38 1997-07-01 5.24 1997-08-01 5.27 1997-09-01 5.23 1997-10-01 5.17 1997-11-01 5.17 1997-12-01 5.24 1998-01-01 4.98 1998-02-01 5.04 1998-03-01 5.11 1998-04-01 5.10 1998-05-01 5.16 1998-06-01 5.13 1998-07-01 5.08 1998-08-01 4.94 1998-09-01 4.50 1998-10-01 3.95 1998-11-01 4.33 1998-12-01 4.32 1999-01-01 4.31 1999-02-01 4.48 1999-03-01 4.53 1999-04-01 4.45 1999-05-01 4.60 1999-06-01 4.82 1999-07-01 4.75 1999-08-01 4.91 1999-09-01 4.96 1999-10-01 5.12 1999-11-01 5.24 1999-12-01 5.51 2000-01-01 5.75 2000-02-01 5.84 2000-03-01 5.86 2000-04-01 5.80 2000-05-01 5.94 2000-06-01 5.83 2000-07-01 5.75 2000-08-01 5.87 2000-09-01 5.79 2000-10-01 5.72 2000-11-01 5.84 2000-12-01 5.33 2001-01-01 4.63 2001-02-01 4.51 2001-03-01 4.11 2001-04-01 3.80 2001-05-01 3.60 2001-06-01 3.37 2001-07-01 3.39 2001-08-01 3.26 2001-09-01 . 2001-10-01 . 2001-11-01 . 2001-12-01 . 2002-01-01 . 2002-02-01 . 2002-03-01 . 2002-04-01 . 2002-05-01 . 2002-06-01 . 2002-07-01 . 2002-08-01 . 2002-09-01 . 2002-10-01 . 2002-11-01 . 2002-12-01 . 2003-01-01 . 2003-02-01 . 2003-03-01 . 2003-04-01 . 2003-05-01 . 2003-06-01 . 2003-07-01 . 2003-08-01 . 2003-09-01 . 2003-10-01 . 2003-11-01 . 2003-12-01 . 2004-01-01 . 2004-02-01 . 2004-03-01 . 2004-04-01 . 2004-05-01 . 2004-06-01 . 2004-07-01 . 2004-08-01 . 2004-09-01 . 2004-10-01 . 2004-11-01 . 2004-12-01 . 2005-01-01 . 2005-02-01 . 2005-03-01 . 2005-04-01 . 2005-05-01 . 2005-06-01 . 2005-07-01 . 2005-08-01 . 2005-09-01 . 2005-10-01 . 2005-11-01 . 2005-12-01 . 2006-01-01 . 2006-02-01 . 2006-03-01 . 2006-04-01 . 2006-05-01 . 2006-06-01 . 2006-07-01 . 2006-08-01 . 2006-09-01 . 2006-10-01 . 2006-11-01 . 2006-12-01 . 2007-01-01 . 2007-02-01 . 2007-03-01 . 2007-04-01 . 2007-05-01 . 2007-06-01 . 2007-07-01 . 2007-08-01 . 2007-09-01 . 2007-10-01 . 2007-11-01 . 2007-12-01 . 2008-01-01 . 2008-02-01 . 2008-03-01 . 2008-04-01 . 2008-05-01 . 2008-06-01 2.35 2008-07-01 2.20 2008-08-01 2.11 2008-09-01 1.86 2008-10-01 1.38 2008-11-01 1.04 2008-12-01 0.47 2009-01-01 0.42 2009-02-01 0.60 2009-03-01 0.62 2009-04-01 0.52 2009-05-01 0.48 2009-06-01 0.49 2009-07-01 0.46 2009-08-01 0.44 2009-09-01 0.38 2009-10-01 0.35 2009-11-01 0.29 2009-12-01 0.35 2010-01-01 0.32 2010-02-01 0.33 2010-03-01 0.37 2010-04-01 0.42 2010-05-01 0.35 2010-06-01 0.30 2010-07-01 0.28 2010-08-01 0.25 2010-09-01 0.25 2010-10-01 0.22 2010-11-01 0.24 2010-12-01 0.28 2011-01-01 0.26 2011-02-01 0.27 2011-03-01 0.24 2011-04-01 0.23 2011-05-01 0.17 2011-06-01 0.17 2011-07-01 0.18 2011-08-01 0.11 2011-09-01 0.10 2011-10-01 0.11 2011-11-01 0.11 2011-12-01 0.11 2012-01-01 0.11 2012-02-01 0.15 2012-03-01 0.18 2012-04-01 0.18