Summary
- Yes, I didn’t see this coming.
- Today’s decision is a gift to small-scale investors seeking inflation protection, and should be applauded.
- If you already bought your full 2019 allocation of I Bonds before April 30, you still get the advantage of the higher composite rate for six months.
Combined with the new inflation-adjusted variable rate – based on U.S. inflation from September 2018 to March 2019 – these new I Bonds will earn a composite rate of 1.90% for six months, the Treasury announced today. This is a drop from the composite rate of 2.83% for I Bonds purchased from November 2018 to April 2019.
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Treasury Inflation-Protected Securities 
To echo what Jim said above, inflation provides a windfall to those who hold nominal debt, and deflation provides a…