The semi-annual CPI-U rate dropped from 238.031 to 236.119, resulting in a negative variable rate for this period. The resulting variable rate will be 0.00 since bonds can...
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Historical Composite
I Bond Rates
The composite rate of the I Bond at any time is based
on the Fixed Value and the Variable Value. The Rate is based on the following formula
established by the Treasury:
Composite Rate = Fixed rate + 2 * CPI-U Rate
+
(Fixed rate * CPI-U Rate)
| Mean: |
3.36% |
| Median: |
3.21% |
| Highest rate: |
7.49% |
| Lowest rate: |
0.00% |
|
November 2018
|
2.83%
|
|
May 2018
|
1.96%
|
|
November 2017
|
2.52%
|
|
May 2017
|
1.96%
|
|
November 2016
|
2.76%
|
|
May 2016
|
0.26%
|
|
November 2015
|
1.64%
|
|
May 2015
|
0.00%
|
|
November 2014
|
1.48%
|
|
May 2014
|
1.94%
|
|
November 2013
|
1.38%
|
|
May 2013
|
1.18%
|
|
November 2012
|
1.76%
|
|
May 2012
|
2.20%
|
|
November 2011
|
3.06%
|
|
May 2011
|
4.60%
|
|
November 2010
|
0.74%
|
|
May 2010
|
1.74%
|
|
November 2009
|
3.36%
|
|
May 2009
|
0.00%
|
|
November 2008
|
5.64%
|
|
May 2008
|
4.84%
|
|
November 2007
|
4.28%
|
|
May 2007
|
3.74%
|
|
November 2006
|
4.52%
|
|
May 2006
|
2.41%
|
|
November 2005
|
6.73%
|
|
May 2005
|
4.80%
|
|
November 2004
|
3.67%
|
|
May 2004
|
3.39%
|
|
November 2003
|
2.19%
|
|
May 2003
|
4.66%
|
|
November 2002
|
4.08%
|
|
May 2002
|
2.57%
|
|
November 2001
|
4.40%
|
|
May 2001
|
5.92%
|
|
November 2000
|
6.49%
|
|
May 2000
|
7.49%
|
|
November 1999
|
6.98%
|
|
May 1999
|
5.05%
|
|
November 1998
|
5.05%
|
|
September 1998
|
4.66%
|
This graph shows the value of a new I Bond's rate for the first 6 months.
After 6 months, the variable rate would change based on changes in the CPI-U rate.
Related Topics
Page last modified 9/25/2011