Code of Federal Regulations Title 31. Money and Finance–Treasury § 31.359.55 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.):

 Example:  Calculated value of $25.044 rounds to $25.04;  calculated value of $25.045 rounds to $25.05.

[Book-entry par investment ÷ 100] x [CRV value for $100 bond].