26 CFR § 1.1092(d)-1 - Definitions and special rules.
(b) Established financial market -
(iv) A foreign securities exchange or board of trade that satisfies analogous regulatory requirements under the law of the jurisdiction in which it is organized (such as the London International Financial Futures Exchange, the Marche a Terme International de France, the International Stock Exchange of the United Kingdom and the Republic of Ireland, Limited, the Frankfurt Stock Exchange, and the Tokyo Stock Exchange);
(v) An interbank market;
(2) Definitions -
(i) Interdealer market. An interdealer market is characterized by a system of general circulation (including a computer listing disseminated to subscribing brokers, dealers, or traders) that provides a reasonable basis to determine fair market value by disseminating either recent price quotations (including rates, yields, or other pricing information) of one or more identified brokers, dealers, or traders or actual prices (including rates, yields, or other pricing information) of recent transactions. An interdealer market does not include a directory or listing of brokers, dealers, or traders for specific contracts (such as yellow sheets) that provides neither price quotations nor actual prices of recent transactions.
(ii) Debt market. A debt market exists with respect to a debt instrument if price quotations for the instrument are readily available from brokers, dealers, or traders. A debt market does not exist with respect to a debt instrument if -
(A) No other outstanding debt instrument of the issuer (or of any person who guarantees the debt instrument) is traded on an established financial market described in paragraph (b)(1)(i), (ii), (iii), (iv), (v), or (vi) of this section (other traded debt);
(C) The conditions and covenants relating to the issuer's performance with respect to the debt instrument are materially less restrictive than the conditions and covenants included in all of the issuer's other traded debt (e.g., the debt instrument is subject to an economically significant subordination provision whereas the issuer's other traded debt is senior); or
(c) Notional principal contracts. For purposes of section 1092(d) -
(1) A notional principal contract (as defined in § 1.446-3(c)(1)) constitutes personal property of a type that is actively traded if contracts based on the same or substantially similar specified indices are purchased, sold, or entered into on an established financial market within the meaning of paragraph (b) of this section; and
(d) Debt instrument linked to the value of personal property. If a taxpayer is the obligor under a debt instrument one or more payments on which are linked to the value of personal property or a position with respect to personal property, then the taxpayer's obligation under the debt instrument is a position with respect to personal property and may be part of a straddle.