Series I Savings Bond

Inflation-protected U.S. savings bond. Rate resets every May 1 and Nov 1; state-tax-free, federal-deferred. Tbillery tracks its current reference yield and compares it with the other safe places to park cash.

Compare with: Treasury Bill · Treasury Note · Treasury Inflation-Protected Security · Certificate of Deposit · Money Market / High-Yield Savings.

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Updated July 2026