What Is the Relationship Between 13-Week Treasury Bill Index and 30-Year Treasury Bond Index?

What Is the Relationship Between 13 Week Treasury Bill Index and 30-Year Treasury Bond Index can be summarized as:

• The 13-week Treasury Bill index influences the 30-Year Treasury Bond Index and moves in the same directioin.
• The 30-Year Treasury Bond Index moves slower than the 13-week Treasury Bill index.

Compare:
   13 WEEK TREASURY BILL
   Cboe Indices: ^IRX
   2026-08-06: 3.73199987 Percent
with:
   Treasury Yield 30 Years
   Cboe Indices: ^TYX
   2026-08-06: 5.09599972 Percent

          13 WEEK TREASURY BI  Treasury Yield 30 Y
                ^IRX  Growth%        ^TYX  Growth%
           ---------- -------   ---------- -------
2026-08-06       3.73  100.00         5.10  100.00
2026-08-05       3.72   99.81         5.10  100.00
2026-08-04       3.73   99.95         5.10  100.00
2026-08-03       3.70   99.14         5.10  100.00
2026-07-31       3.68   98.66         5.10  100.00
2026-07-30       3.67   98.47         5.10  100.00
2026-07-29       3.66   98.02         5.10  100.00
2026-07-28       3.76  100.75         5.10  100.00
2026-07-27       3.80  101.74         5.13  100.57
2026-07-24       3.81  101.96         5.16  101.30
2026-07-23       3.80  101.82         5.17  101.47
2026-07-22       3.74  100.35         5.15  101.00
2026-07-21       3.73   99.95         5.13  100.67
2026-07-20       3.70   99.28         5.12  100.43
2026-07-17       3.71   99.33         5.06   99.37
2026-07-16       3.70   99.06         5.10  100.04
2026-07-15       3.69   98.82         5.08   99.74
2026-07-14       3.70   99.14         5.09   99.96
2026-07-13       3.73   99.89         5.10  100.04
2026-07-10       3.69   99.01         5.07   99.51
2026-07-09       3.68   98.66         5.05   99.16
2026-07-06       3.69   98.87         4.99   97.82
2026-06-06       3.63   97.13         5.00   98.10
2026-05-06       3.60   96.46         4.94   97.00
2026-04-06       3.62   97.08         4.89   95.98
2026-03-06       3.57   95.66         4.76   93.31
2026-02-06       3.59   96.20         4.86   95.27
2026-01-06       3.52   94.32         4.87   95.49
2025-12-06       3.60   96.54         4.79   94.03
2025-11-06       3.76  100.83         4.69   91.99
2025-10-06       3.86  103.43         4.76   93.37
2025-09-06       3.91  104.77         4.78   93.70
2025-08-06       4.13  110.74         4.81   94.41
2024-08-06       5.24  140.35         4.72   92.58
2023-08-06       5.30  142.02         5.02   98.55
2022-08-06       3.18   85.21         4.20   82.50
2021-08-06       0.03    0.75         1.94   38.11
2020-08-06       0.09    2.28         1.64   32.18
2019-08-06       1.77   47.43         2.18   42.70
2018-08-06       2.15   57.61         3.40   66.76
2017-08-06       1.03   27.55         2.88   56.42
2016-08-06       0.26    6.97         2.59   50.80
2015-08-06       0.01    0.13         2.93   57.55
2014-08-06       0.01    0.35         3.06   60.05
2013-08-06       0.01    0.13         3.63   71.25
2012-08-06       0.09    2.41         2.85   55.95
2011-08-06       0.01    0.27         3.20   62.77
2010-08-06       0.16    4.15         4.00   78.49
2009-08-06       0.12    3.08         4.24   83.12
2008-08-06       0.90   24.12         4.37   85.73
2007-08-06       3.70   99.14         4.75   93.23
2006-08-06       4.76  127.55         4.72   92.60
2005-08-06       3.47   92.98         4.76   93.31
2004-08-06       1.67   44.86         4.79   94.07
2003-08-06       0.93   24.81         5.14  100.96
2002-08-06       1.53   40.92         5.01   98.25
2001-08-06       2.30   61.63         4.87   95.62
2000-08-06       6.03  161.58         5.78  113.50
1999-08-06       4.71  126.21         6.15  120.66
1998-08-06       4.25  113.88         5.14  100.92
1997-08-06       4.97  133.17         6.14  120.57
1996-08-06       4.91  131.56         6.65  130.49
1995-08-06       5.24  140.41         6.32  123.96
1994-08-06       4.67  125.13         7.96  156.24
1993-08-06       2.92   78.24         5.97  117.05
1992-08-06       2.69   72.08         7.63  149.73
1991-08-06       5.11  136.92         7.91  155.22
1990-08-06       7.14  191.32         8.78  172.29
1989-08-06       7.91  211.95         7.92  155.42
1988-08-06       7.25  194.27         8.74  171.51
1987-08-06       6.61  177.12         9.03  177.20
1986-08-06       5.20  139.34         7.61  149.33
1985-08-06       7.04  188.64        10.28  201.73
1984-11-01                           11.21  219.98

⇒ NYSE: ^MOVE - ICE BofAML MOVE Index

⇐ Relation of 13Wk T-Bill Index and Fed Interest

⇑ US Treasury Security Indices

⇑⇑ Market Indices