Consumer Price Index Ratio Law and Legal Definition

According to 31 CFR 356.2 [Title 31 -- Money and Finance: Treasury; Subtitle B -- Regulations Relating to Money and Finance; Chapter II -- Fiscal Service, Department of the Treasury; Subchapter B -- Bureau of the Public Debt; Part 356 -- Sale and Issue of Marketable Book-Entry Treasury Bills, Notes and Bonds (Department of the Treasury Circular, Public Debt Series No. 1-93); Subpart A -- General Information], Consumer Price Index ratio means, “for an inflation-protected security, the Reference CPI of a particular date divided by the Reference CPI of the original issue date. (When the dated date is different from the original issue date, the denominator of the index ratio is the Reference CPI of the dated date rather than that of the original issue date.)”