A put or call purchased to make a closing transaction is identical as to striking price and expiration date. Such put or call need not match the granted option in time of creation, date of acquisition, cost of the entire option or units therein, or number of units subject to the option. If such put or call terminates only part of a grantor's obligation under the granted option, a closing transaction is made as to that part.
The preceding sentence shall be applied with respect to dealers in property (as defined in paragraph (b)(2) of this section) and without regard to the limitation of the applicability of section 1236 to dealers in securities.
26 C.F.R. §1.1234-3