acquisition discount
(3) Certain short-term Government obligations (A) In general On the sale or exchange of any short-term Government obligation, any gain realized which does not exceed an amount equal to the ratable share of the acquisition discount shall be treated as ordinary income. (B) Short-term Government obligation For purposes of this paragraph, the term “short-term Government obligation” means any obligation of the United States or any of its possessions, or of a State or any political subdivision thereof, or of the District of Columbia, which has a fixed maturity date not more than 1 year from the date of issue. Such term does not include any tax-exempt obligation. (C) Acquisition discount For purposes of this paragraph, the term “acquisition discount” means the excess of the stated redemption price at maturity over the taxpayer’s basis for the obligation. (D) Ratable share For purposes of this paragraph, except as provided in subparagraph (E), the ratable share of the acquisition discount is an amount which bears the same ratio to such discount as— (i) the number of days which the taxpayer held the obligation, bears to (ii) the number of days after the date the taxpayer acquired the obligation and up to (and including) the date of its maturity. (E) Election of accrual on basis of constant interest rate At the election of the taxpayer with respect to any obligation, the ratable share of the acquisition discount is the portion of the acquisition discount accruing while the taxpayer held the obligation determined (under regulations prescribed by the Secretary) on the basis of— (i) the taxpayer’s yield to maturity based on the taxpayer’s cost of acquiring the obligation, and (ii) compounding daily. An election under this subparagraph, once made with respect to any obligation, shall be irrevocable.