I Bonds Resources
- TreasuryDirect
- In Depth information about I Bonds, including Calculating Interest Rates.
- Savings Bond Calculator
- This TreasuryDirect online calculator is good for showing the value of any number of I Bonds for one point in time. Click Get Started to go directly to the calculator.
- I Bond Monthly Calculator
- I've created an Excel file that computes the same value growth history as do these web pages. It has the advantage that you can enter the size of your I Bond; you're not limited to the sizes on this web site. I Bond Portfolio Calculator calculates the values for an entire porfolio of I Bonds each month for a year.
- Bogleheads‘s Wiki I Savings Bonds
- Explanation of I Bonds including How interest is calculated. In 2010 Mel Lindauer, one of the original Bogleheads, wrote four columns on Forbes about I Bonds: column 1, column 2, column 3, column 4. Also the forum on Bogleheads.org has many topics dealing with I Bonds.
- Bureau of Labor Statistics (BLS)
- Monthly not seasonally adjusted CPI-U for past few years shown on this web page. The I Bond semi-annual Inflation Rates equal the change in the CPI-U between March and September. For example, the 4.81% semi-annual inflation rate effective May 1, 2022 represents the increase from September 2021's 274.310 to March 2022's 287.504.
- Backdoor to Paper Savings Bonds
- After 12/31/2011 the Treasury will no longer issue I Bonds in paper form, except using a tax refund. This article explains how to do it.
- Treasury Inflation Protected Securities (TIPS) Index Ratios
- Another web site I designed which shows the index ratios used to adjust TIPS principal for changes in the CPI.
- Questions or Comments about this Web Site.
- Click this link to send me an email.
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