readily tradable instrument
(6) Readily tradable instrument The term “readily tradable instrument” means— (A) any instrument which is part of an issue any portion of which is traded on an established securities market (within the meaning of section 453(f)(5) ), and (B) except as otherwise provided in regulations prescribed by the Secretary, any instrument which is regularly quoted by brokers or dealers making a market.
26 USC § 3406(h)(6)
None identified. Default scope is assumed to be the entire title.