or any similar financial instrument. (3) Specified index The term specified index means any one or more of any combination of— (A) a fixed rate, price, or amount, or (B) a variable rate, price, or amount, which is based on any current objectively determinable information which is not within the control of any of the parties to the contract or instrument and is not unique to any of the parties’ circumstances. (4) Treatment of exchanges (A) In general An exchange shall be treated as the sale of the property transferred and a purchase of the property received by each party to the exchange. (B) Certain deemed exchanges In the case of a distribution treated as an exchange for stock under section 302 or 331, the corporation making such distribution shall be treated as having purchased such stock for purposes of this section. (f) Exceptions (1) Exception for initial issues No tax shall be imposed under subsection (a) on any covered transaction with respect to the initial issuance of any security described in subparagraph (A), (B), or (C) of subsection (e)(1). (2) Exception for certain traded short-term indebtedness A note, bond, debenture, or other evidence of indebtedness which— (A) is traded on a trading facility located in the United States, and (B) has a fixed maturity of not more than 60 days, shall not be treated as described in subsection (e)(1)(C). (3) Exception for securities lending arrangements No tax shall be imposed under subsection (a) on any covered transaction with respect to which gain or loss is not recognized by reason of section 1058. (4) Exception for interests in mutual funds No tax shall be imposed under subsection (a) with respect to the purchase or sale of any interest in a regulated investment company (as defined in section 851). (g) By whom paid (1) In general The tax imposed by this section shall be paid by— (A) in the case of a transaction which occurs or is cleared on a facility located in the United States, such facility, and (B) in the case of a purchase not described in subparagraph (A)