1141.1—Procedures to calculate interest rates.
(a)
For purposes of complying with a Board decision in a complaint or investigation proceeding, interest rates to be computed shall be the coupon equivalent yield (investment rate) of marketable securities of the United States Government having a duration of 91 days (3 months). The rate levels will be determined as follows:
(1)
For investigation proceedings, the interest rate shall be the coupon equivalent yield in effect on the date the statement is filed accounting for all amounts received under the new rates (See 49 U.S.C. 10707(d)(1) ).
(2)
For complaint proceedings, the interest rate shall be the coupon equivalent yield in effect on the first day of the calendar quarter in which an unlawful charge is paid. The interest rate in complaint proceedings shall be updated as of the first day of all subsequent calendar quarters, at the coupon equivalent yields in effect on those days. Updating will continue until the required reparation payments are made.
(3)
For purposes of this section, coupon equivalent yields shall be considered “in effect” on the date the securities are issued, not on the date they are auctioned. If the date the statement is filed (for investigation proceedings) or if the first day of the calendar quarter (for complaint proceedings) is the same as the issue date, then the yield on that date shall be used.
(1)
For investigation proceedings, the reparations period shall begin on the date the investigation is started. Thus, unless by coincidence, the quarterly compounding periods in investigation proceedings will not coincide with the calendar quarters.
(2)
For complaint proceedings, the reparations period shall begin on the date the unlawful charge is paid. However, in order for the quarterly compounding periods in complaint cases to coincide with the calendar quarters (so that only one interest rate is in effect during each compounding period), the first compounding period shall run from the date the unlawful charge is paid to the last day of the current calendar quarter, and all subsequent compounding periods shall coincide with the calendar quarters.
(3)
For both investigation and complaint proceedings, the annual effective interest rate shall be the same as the annual nominal (or stated) rate. Thus, the nominal rate must be factored exponentially to the power representing the portion of the year covered by the interest rate. A simple multiplication of the nominal rate by the portion of the year covered by the interest rate would not be appropriate because it would result in an effective rate in excess of the nominal rate. Under this “exponential” approach, the total cumulative reparations payment (including interest) is calculated by multiplying the interest factor for each quarterly period (or part thereof) by the principal amount for that period plus any accumulated interest from previous periods. The “interest factor” for each period is 1.0 plus the interest rate for that period to the power representing the portion of the year covered by the interest rate. As an example, if the annual interest rate for the quarter is 5.6 percent, then the interest factor would be 1.01368, or 1.056 to the power of 91/365.
[58 FR 19360, Apr. 14, 1993]