31 C.F.R. § 359.55 How are redemption values calculated for book-entry Series I savings bonds?
Title 31 - Money and Finance: Treasury
We base current redemption values (CRV) for book-entry Series I savings bonds on the definitive savings bonds CRV. To calculate the book-entry values, we use the CRV for the $100 denomination Series I savings bonds and calculate a CRV prorated to the book-entry par investment amount for the corresponding issue and redemption dates. Calculated book-entry CRV will be rounded to the nearest one cent.5 5 Example: Calculated value of $25.044 rounds to $25.04; calculated value of $25.045 rounds to $25.05. [Book-entry par investment ÷ 100] × [CRV value for $100 bond].
Title 31: Money and Finance: Treasury
PART 359—OFFERING OF UNITED STATES SAVINGS BONDS, SERIES I
Subpart C—Book-Entry Series I Savings Bonds
§ 359.55 How are redemption values calculated for book-entry Series I savings bonds?