This inflation adjustment is added to the fixed rate to get the composite rate for each succeeding six month period.

FORBES: Inflation Is Back And So Are I Bonds

The GAO report notes that Medicare pays for certain dialysis services under a type of bundled rate, called a composite rate.

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The composite rate can never go below 0%, so even if we experience a prolonged period of severe de flation, the I Bonds will still help protect the future spending power of your investment.

FORBES: Inflation Is Back And So Are I Bonds

The centre said the expansion would allow for more training and skills development, and provide a dedicated high rate composite manufacturing facility.

BBC: National Composites Centre in Bristol to expand

The composite survey of thousands of firms by Markit showed a continued contraction - but at a slower rate than in November.

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So, when we add the 0% fixed rate and the 4.6% inflation adjustment, we get the current 4.6% composite yield.

FORBES: Inflation Is Back And So Are I Bonds