(2) Certain dispositions not taken into account

For purposes of paragraph (1)(C), there shall not be taken into account any disposition—

(A) after the earlier of the death of the taxpayer or the death of the related person,

(B) in a compulsory or involuntary conversion (within the meaning of section 1033) if the exchange occurred before the threat or imminence of such conversion, or

(C) with respect to which it is established to the satisfaction of the Secretary that neither the exchange nor such disposition had as one of its principal purposes the avoidance of Federal income tax.

(3) Related person

For purposes of this subsection, the term “related person” means any person bearing a relationship to the taxpayer described in section 267 (b) or 707 (b)(1).

(4) Treatment of certain transactions

This section shall not apply to any exchange which is part of a transaction (or series of transactions) structured to avoid the purposes of this subsection. 

(g) Special rule where substantial diminution of risk

(1) In general

If paragraph (2) applies to any property for any period, the running of the period set forth in subsection (f)(1)(C) with respect to such property shall be suspended during such period.

(2) Property to which subsection applies

This paragraph shall apply to any property for any period during which the holder’s risk of loss with respect to the property is substantially diminished by—

(A) the holding of a put with respect to such property,

(B) the holding by another person of a right to acquire such property, or

(C) a short sale or any other transaction.

(h) Special rules for foreign real and personal property