§ 359.55 How are redemption values calculated for book-entry Series I savings bonds?
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.[4] The formula is as follows (Examples of the calculation are given in appendix A to part 359.):
[Book-entry par investment ÷ 100] × [CRV value for $100 bond].
[67 FR 64278, Oct. 17, 2002, as amended at 75 FR 52461, Aug. 26, 2010]