31 CFR 359.14 - How are composite rates determined?

Regulations last checked for updates: Nov 22, 2024

Title 31 - Money and Finance: Treasury last revised: Nov 18, 2024

View all text of Subpart A [§ 359.0 - § 359.24]

§ 359.14 - How are composite rates determined?

Composite rates are set according to the following formula (See appendix A to part 359 for examples of calculations involving composite interest rates.):

Composite rate = {(Fixed rate ÷ 2) + Semiannual inflation rate + [Semiannual inflation rate × (Fixed rate ÷ 2)]} × 2. 2

2 Example for I bonds issued May 2002-October 2002:

Fixed rate = 2.00%

Inflation rate = 0.28%

Composite rate = [0.0200 ÷ 2 + 0.0028 + (0.0028 × 0.0200 ÷ 2)] × 2

Composite rate = [0.0100 + 0.0028 + 0.000028] × 2

Composite rate = 0.012828 × 2

Composite rate = 0.025656

Composite rate = 0.0257 (rounded)

Composite rate = 2.57% (rounded)

authority: 5 U.S.C. 301; 12 U.S.C. 391; 31 U.S.C. 3105.

source: 67 FR 64278, Oct. 17, 2002, unless otherwise noted.

cite as: 31 CFR 359.14