Title:               Market Yield on U.S. Treasury Securities at 20-Year Constant Maturity, Quoted on an Investment Basis, Inflation-Indexed
Series ID:           FII20
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:          2004-07-01 to 2024-03-01
Last Updated:        2024-04-01 3:18 PM CDT
Notes:               For further information regarding treasury constant maturity data,
                     please refer to the H.15 Statistical Release notes
                     (https://www.federalreserve.gov/releases/h15/default.htm) and the
                     Treasury Yield Curve Methodology
                     (https://home.treasury.gov/policy-issues/financing-the-government/interest-rate-statistics/treasury-yield-curve-methodology).

DATE        VALUE
2004-07-01   2.44
2004-08-01   2.23
2004-09-01   2.16
2004-10-01   2.13
2004-11-01   2.09
2004-12-01   2.02
2005-01-01   1.98
2005-02-01   1.85
2005-03-01   1.95
2005-04-01   1.87
2005-05-01   1.82
2005-06-01   1.80
2005-07-01   2.00
2005-08-01   2.02
2005-09-01   1.93
2005-10-01   2.09
2005-11-01   2.16
2005-12-01   2.14
2006-01-01   2.05
2006-02-01   2.01
2006-03-01   2.17
2006-04-01   2.43
2006-05-01   2.48
2006-06-01   2.54
2006-07-01   2.52
2006-08-01   2.31
2006-09-01   2.31
2006-10-01   2.38
2006-11-01   2.23
2006-12-01   2.26
2007-01-01   2.42
2007-02-01   2.38
2007-03-01   2.27
2007-04-01   2.35
2007-05-01   2.45
2007-06-01   2.67
2007-07-01   2.62
2007-08-01   2.47
2007-09-01   2.30
2007-10-01   2.26
2007-11-01   1.99
2007-12-01   2.08
2008-01-01   1.81
2008-02-01   1.87
2008-03-01   1.76
2008-04-01   1.91
2008-05-01   2.00
2008-06-01   2.19
2008-07-01   2.09
2008-08-01   2.15
2008-09-01   2.25
2008-10-01   2.87
2008-11-01   3.00
2008-12-01   2.32
2009-01-01   2.46
2009-02-01   2.31
2009-03-01   2.26
2009-04-01   2.22
2009-05-01   2.36
2009-06-01   2.36
2009-07-01   2.31
2009-08-01   2.22
2009-09-01   2.13
2009-10-01   2.04
2009-11-01   1.90
2009-12-01   1.99
2010-01-01   2.00
2010-02-01   2.03
2010-03-01   1.98
2010-04-01   1.90
2010-05-01   1.72
2010-06-01   1.69
2010-07-01   1.80
2010-08-01   1.65
2010-09-01   1.58
2010-10-01   1.32
2010-11-01   1.44
2010-12-01   1.67
2011-01-01   1.70
2011-02-01   1.85
2011-03-01   1.58
2011-04-01   1.48
2011-05-01   1.47
2011-06-01   1.53
2011-07-01   1.36
2011-08-01   0.81
2011-09-01   0.69
2011-10-01   0.72
2011-11-01   0.55
2011-12-01   0.56
2012-01-01   0.51
2012-02-01   0.45
2012-03-01   0.56
2012-04-01   0.50
2012-05-01   0.44
2012-06-01   0.10
2012-07-01  -0.01
2012-08-01   0.06
2012-09-01   0.02
2012-10-01  -0.01
2012-11-01  -0.06
2012-12-01   0.00
2013-01-01   0.20
2013-02-01   0.19
2013-03-01   0.19
2013-04-01   0.07
2013-05-01   0.35
2013-06-01   0.98
2013-07-01   1.09
2013-08-01   1.16
2013-09-01   1.22
2013-10-01   1.05
2013-11-01   1.20
2013-12-01   1.32
2014-01-01   1.17
2014-02-01   1.12
2014-03-01   1.05
2014-04-01   0.98
2014-05-01   0.82
2014-06-01   0.84
2014-07-01   0.72
2014-08-01   0.64
2014-09-01   0.81
2014-10-01   0.74
2014-11-01   0.77
2014-12-01   0.73
2015-01-01   0.50
2015-02-01   0.52
2015-03-01   0.55
2015-04-01   0.42
2015-05-01   0.70
2015-06-01   0.89
2015-07-01   0.87
2015-08-01   0.87
2015-09-01   1.01
2015-10-01   0.98
2015-11-01   1.03
2015-12-01   1.06
2016-01-01   1.05
2016-02-01   0.85
2016-03-01   0.73
2016-04-01   0.60
2016-05-01   0.64
2016-06-01   0.63
2016-07-01   0.42
2016-08-01   0.43
2016-09-01   0.47
2016-10-01   0.49
2016-11-01   0.69
2016-12-01   0.89
2017-01-01   0.74
2017-02-01   0.73
2017-03-01   0.79
2017-04-01   0.72
2017-05-01   0.80
2017-06-01   0.75
2017-07-01   0.84
2017-08-01   0.74
2017-09-01   0.67
2017-10-01   0.77
2017-11-01   0.72
2017-12-01   0.68
2018-01-01   0.69
2018-02-01   0.89
2018-03-01   0.89
2018-04-01   0.85
2018-05-01   0.92
2018-06-01   0.87
2018-07-01   0.84
2018-08-01   0.86
2018-09-01   0.95
2018-10-01   1.14
2018-11-01   1.21
2018-12-01   1.11
2019-01-01   1.07
2019-02-01   0.96
2019-03-01   0.85
2019-04-01   0.79
2019-05-01   0.75
2019-06-01   0.59
2019-07-01   0.54
2019-08-01   0.25
2019-09-01   0.32
2019-10-01   0.36
2019-11-01   0.37
2019-12-01   0.35
2020-01-01   0.26
2020-02-01   0.12
2020-03-01   0.03
2020-04-01  -0.28
2020-05-01  -0.26
2020-06-01  -0.28
2020-07-01  -0.53
2020-08-01  -0.62
2020-09-01  -0.59
2020-10-01  -0.51
2020-11-01  -0.44
2020-12-01  -0.54
2021-01-01  -0.53
2021-02-01  -0.35
2021-03-01  -0.14
2021-04-01  -0.20
2021-05-01  -0.27
2021-06-01  -0.34
2021-07-01  -0.52
2021-08-01  -0.56
2021-09-01  -0.51
2021-10-01  -0.51
2021-11-01  -0.63
2021-12-01  -0.61
2022-01-01  -0.31
2022-02-01  -0.13
2022-03-01  -0.30
2022-04-01   0.13
2022-05-01   0.47
2022-06-01   0.70
2022-07-01   0.75
2022-08-01   0.65
2022-09-01   1.21
2022-10-01   1.64
2022-11-01   1.55
2022-12-01   1.37
2023-01-01   1.35
2023-02-01   1.46
2023-03-01   1.43
2023-04-01   1.33
2023-05-01   1.48
2023-06-01   1.56
2023-07-01   1.60
2023-08-01   1.88
2023-09-01   2.07
2023-10-01   2.45
2023-11-01   2.23
2023-12-01   1.90
2024-01-01   1.92
2024-02-01   2.04
2024-03-01   2.01