[Code of Federal Regulations]
[Title 26, Volume 11]
[Revised as of April 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 26CFR1.1233-1]

[Page 306-312]
 
                       TITLE 26--INTERNAL REVENUE
 
    CHAPTER I--INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY 
                               (CONTINUED)
 
PART 1_INCOME TAXES--Table of Contents
 
Sec. 1.1233-1  Gains and losses from short sales.

    (a) General. (1) For income tax purposes, a short sale is not deemed 
to be consummated until delivery of property to close the short sale. 
Whether the recognized gain or loss from a short sale is capital gain or 
loss or ordinary gain or loss depends upon whether the property so 
delivered constitutes a capital asset in the hands of the taxpayer.
    (2) Thus, if a dealer in securities makes a short sale of X 
Corporation stock, ordinary gain or loss results on closing of the short 
sale if the stock used to close the short sale was stock which he held 
primarily for sale to customers in the ordinary course of his trade or 
business. If the stock used to close the short sale was a capital asset 
in his hands, or if the taxpayer in this example was not a dealer, a 
capital gain or loss would result.
    (3) Generally, the period for which a taxpayer holds property 
delivered to close a short sale determines whether long-term or short-
term capital gain or loss results.
    (4) Thus, if a taxpayer makes a short sale of shares of stock and 
covers the short sale by purchasing and delivering shares which he held 
for not more than 1 year (6 months for taxable years beginning before 
1977; 9 months for taxable years beginning in 1977), the recognized gain 
or loss would be considered short-term capital gain or loss. If the 
short sale is made through a broker and the broker borrows property to 
make a delivery, the short sale is not deemed to be consummated until 
the obligation of the seller created by the short sale is finally 
discharged by delivery of property to the broker to replace the property 
borrowed by the broker.
    (5) For rules for determining the date of sale for purposes of 
applying under section 1091 the 61-day period applicable to a short sale 
of stock or securities at a loss, see paragraph (g) of Sec. 1.1091-1.
    (b) Hedging transactions. Under section 1233(g), the provisions of 
section 1233 and this section shall not apply to any bona fide hedging 
transaction in commodity futures entered into by flour millers, 
producers of cloth, operators of grain elevators, etc., for the purpose 
of their business. Gain or loss from a short sale of commodity futures 
which does not qualify as a hedging transaction shall be considered gain 
or loss from the sale or exchange of a capital asset if the commodity 
future used to close the short sale constitutes a capital asset in the 
hands of the taxpayer as explained in paragraph (a) of this section.
    (c) Special short sales--(1) General. Section 1233 provides rules as 
to the tax consequences of a short sale of property if gain or loss from 
the short sale is considered as gain or loss from the sale or exchange 
of a capital asset under section 1233(a) and paragraph (a) of this 
section and if, at the time of the short sale or on or before the date 
of the closing of the short sale, the taxpayer holds property 
substantially

[[Page 307]]

identical to that sold short. The term property is defined for purposes 
of such rules to include only stocks and securities (including stocks 
and securities dealt with on a when issued basis) and commodity futures, 
which are capital assets in the hands of the taxpayer. Certain 
restrictions on the application of the section to commodity futures are 
provided in section 1233(e) and paragraph (d)(2) of this section. 
Section 1233(f) contains special provisions governing the operation of 
rule (2) in subparagraph (2) of this paragraph in the case of a purchase 
and short sale of stock (as defined in subparagraph (3) qualifying as an 
arbitrage operation. See paragraph (f) of this section for detailed 
rules relating to arbitrage operations in stocks and securities.
    (2) Treatment of special short sales. The first two rules, which are 
set forth in section 1233(b), are applicable whenever property 
substantially identical to that sold short has been held by the taxpayer 
on the date of the short sale for not more than 1 year (6 months for 
taxable years beginning before 1977; 9 months for taxable years 
beginning in 1977) (determined without regard to rule (2), contained in 
this subparagraph, relating to the holding period) or is acquired by him 
after the short sale and on or before the date of the closing thereof. 
These rules are:

    Rule (1). Any gain upon the closing of such short sale shall be 
considered as a gain upon the sale or exchange of a capital asset held 
for not more than 1 year (6 months for taxable years beginning before 
1977; 9 months for taxable years beginning in 1977) (notwithstanding the 
period of time any property used to close such short sale has been 
held); and
    Rule (2). The holding period of such substantially identical 
property shall be considered to begin (notwithstanding the provisions of 
section 1223) on the date of the closing of such short sale or on the 
date of a sale, gift, or other disposition of such property, whichever 
date occurs first.

    (3) Options to sell. For the purpose of rule (1) and rule (2) in 
subparagraph (2) of this paragraph, the acquisition of an option to sell 
property at a fixed price shall be considered a short sale, and the 
exercise or failure to exercise such option shall be considered as a 
closing of such short sale, except that any option to sell property at a 
fixed price acquired on or after August 17, 1954 (the day after 
enactment of the Internal Revenue Code of 1954), shall not be considered 
a short sale and the exercise or failure to exercise such option shall 
not be considered as the closing of a short sale provided that the 
option and property identified as intended to be used in its exercise 
are acquired on the same date. This exception shall not apply, if the 
option is exercised, unless it is exercised by the sale of the property 
so identified. In the case of any option not exercised which falls 
within this exception, the cost of such option shall be added to the 
basis of the property with which such option is identified. If the 
option itself does not specifically identify the property intended to be 
used in exercising the option, then the identification of such property 
shall be made by appropriate entries in the taxpayer's records within 15 
days after the date such property is acquired or before November 17, 
1956, whichever expiration date later occurs.
    (4) Treatment of losses. The third rule, which is set forth in 
section 1233(d), is applicable whenever property substantially identical 
to that sold short has been held by the taxpayer on the date of the 
short sale for more than 1 year (6 months for taxable years beginning 
before 1977; 9 months for taxable years beginning in 1977). This rule 
is:

    Rule (3). Any loss upon the closing of such short sale shall be 
considered as a loss upon the sale or exchange of a capital asset held 
for more than 1 year (6 months for taxable years beginning before 1977; 
9 months for taxable years beginning in 1977), not withstanding the 
period of time any property used to close such short sale has been held. 
For the purpose of this rule, the acquisition of an option to sell 
property at a fixed price is not considered a short sale, and the 
exercise or failure to exercise such option is not considered as a 
closing of a short sale.

    (5) Application of rules. Rules (1) and (3) contained in 
subparagraphs (2) and (4) of this paragraph do not apply to the gain or 
loss attributable to so much of the property sold short as exceeds in 
quantity the substantially identical property referred to in section 
1233 (b) and (d), respectively. Except as otherwise provided in section 
1233(f), rule (2) in subparagraph (2) of this paragraph applies to the 
substantially identical property referred to in

[[Page 308]]

section 1233(b) in the order of the dates of the acquisition of such 
property, but only to so much of such property as does not exceed the 
quantity sold short. If property substantially identical to that sold 
short has been held by the taxpayer on the date of the short sale for 
not more than 1 year (6 months for taxable years beginning before 1977; 
9 months for taxable years beginning in 1977), or is acquired by him 
after the short sale and on or before the date of the closing thereof, 
and if property substantially identical to that sold short has been held 
by the taxpayer on the date of the short sale for more than 1 year (6 
months for taxable years beginning before 1977; 9 months for taxable 
years beginning in 1977), all three rules are applicable.
    (6) Examples. The following examples illustrate the application of 
these rules to short sales of stock in the case of a taxpayer who makes 
his return on the basis of the calendar year:

    Example 1. A buys 100 shares of X stock at $10 per share on February 
1, 1955, sells short 100 shares of X stock at $16 per share on July 1, 
1955, and closes the short sale on August 2, 1955, by delivering the 100 
shares of X stock purchased on February 1, 1955, to the lender of the 
stock used to effect the short sale. Since 100 shares of X stock had 
been held by A on the date of the short sale for not more than 6 months, 
the gain of $600 realized upon the closing of the short sale is, by 
application of rule (1) in subparagraph (2) of this paragraph, a short-
term capital gain.
    Example 2. A buys 100 shares of X stock at $10 per share on February 
1, 1955, sells short 100 shares of X stock at $16 per share on July 1, 
1955, closes the short sale on August 1, 1955, with 100 shares of X 
stock purchased on that date at $18 per share, and on August 2, 1955, 
sells at $18 per share the 100 shares of X stock purchased on February 
1, 1955. The $200 loss sustained upon the closing of the short sale is a 
short-term capital loss to which section 1233(d) has no application. By 
application of rule (2) in subparagraph (2) of this paragraph, however, 
the holding period of the 100 shares of X stock purchased on February 1, 
1955, and sold on August 2, 1955 is considered to begin on August 1, 
1955, the date of the closing of the short sale. The $800 gain realized 
upon the sale of such stock is, therefore, a short-term capital gain.
    Example 3. A buys 100 shares of X stock at $10 per share on February 
1, 1955, sells short 100 shares of X stock at $16 per share on September 
1, 1955, sells on October 1, 1955, at $18 per share the 100 shares of X 
stock purchased on February 1, 1955, and closes the short sale on 
October 1, 1955, with 100 shares of X stock purchased on that date at 
$18 per share. The $800 gain realized upon the sale of the 100 shares of 
X stock purchased on February 1, 1955, is a long-term capital gain to 
which section 1233(b) has no application. Since A had held 100 shares of 
X stock on the date of the short sale for more than 6 months, the $200 
loss sustained upon the closing of the short sale is, by application of 
rule (3) in subparagraph (4) of this paragraph, a long-term capital 
loss. If, instead of purchasing 100 shares of X stock on October 1, 
1955, A closed the short sale with the 100 shares of stock purchased on 
February 1, 1955, the $600 gain realized on the closing of the short 
sale would be a long-term capital gain to which section 1233(b) has no 
application.
    Example 4. A sells short 100 shares of X stock at $16 per share on 
February 1, 1955. He buys 250 shares of X stock on March 1, 1955, at $10 
per share and holds the latter stock until September 2, 1955 (more than 
6 months), at which time, 100 shares of the 250 shares of X stock are 
delivered to close the short sale made on February 1, 1955. Since 
substantially identical property was acquired by A after the short sale 
and before it was closed, the $600 gain realized on the closing of the 
short sale is, by application of rule (1) in subparagraph (2) of this 
paragraph, a short-term capital gain. The holding period of the 
remaining 150 shares of X stock is not affected by section 1233 since 
this amount of the substantially identical property exceeds the quantity 
of the property sold short.
    Example 5. A buys 100 shares of X stock at $10 per share on February 
1, 1955, buys an additional 100 shares of X stock at $20 per share on 
July 1, 1955, sells short 100 shares of X stock at $30 per share on 
September 1, 1955, and closes the short sale on February 1, 1956, by 
delivering the 100 shares of X stock purchased on February 1, 1955, to 
the lender of the stock used to effect the short sale. Since 100 shares 
of X stock had been held by A on the date of the short sale for not more 
than 6 months, the gain of $2,000 realized upon the closing of the short 
sale is, by application of rule (1) in subparagraph (2) of this 
paragraph, a short-term capital gain and the holding period of the 100 
shares of X stock purchased on July 1, 1955, is considered, by 
application of rule (2) in subparagraph (2) of this paragraph to begin 
on February 1, 1956, the date of the closing of the short sale. If, 
however, the 100 shares of X stock purchased on July 1, 1955, had been 
used by A to close the short sale, then, since 100 shares of X stock had 
been held by A on the date of the short sale for not more than 6 months, 
the gain of $1,000 realized upon the closing of the short sale would be, 
by application of rule (1) in subparagraph (2) of this paragraph, a 
short-term capital gain, but the holding period of the 100 shares of X 
stock purchased on February 1, 1955, would not be affected by section 
1233. If,

[[Page 309]]

on the other hand, A purchased an additional 100 shares of X stock at 
$40 per share on February 1, 1956, and used such shares to close the 
short sale at that time, then, since 100 shares of X stock had been held 
by A on the date of the short sale for more than 6 months, the loss of 
$1,000 sustained upon the closing of the short sale would be, by 
application of rule (3) in subparagraph (4) of this paragraph, a long-
term capital loss, and since 100 shares of X stock had been held by A on 
the date of the short sale for not more than 6 months, the holding 
period of the 100 shares of X stock purchased on July 1, 1955, would be 
considered, by application of rule (2) in subparagraph (2) of this 
paragraph, to begin on February 1, 1956, but the holding period of the 
100 shares of X stock purchased on February 1, 1955, would not be 
affected by section 1233.
    Example 6. A buys 100 shares of X preferred stock at $10 per share 
on February 1, 1955. On July 1, 1955, he enters into a contract to sell 
100 shares of XY common stock at $16 per share when, as, and if issued 
pursuant to a particular plan of reorganization. On August 2, 1955, he 
receives 100 shares of XY common stock in exchange for the 100 shares of 
X preferred stock purchased on February 1, 1955, and delivers such 
common shares in performance of his July 1, 1955, contract. Assume that 
the exchange of the X preferred stock for the XY common stock is a tax-
free exchange pursuant to section 354(a)(1), and that on the basis of 
all of the facts and circumstances existing on July 1, 1955, the when 
issued XY common stock is substantially identical to the X preferred 
stock. Since 100 shares of substantially identical property had been 
held by A for not more than 6 months on the date of entering into the 
July 1, 1955, contract of sale, the gain of $600 realized upon the 
closing of the contract of sale is, by application of rule (1) in 
subparagraph (2) of this paragraph, a short-term capital gain.

    (d) Other rules for the application of section 1233--(1) 
Substantially identical property. The term substantially identical 
property is to be applied according to the facts and circumstances in 
each case. In general, as applied to stocks or securities, the term has 
the same meaning as the term substantially identical stock or securities 
used in section 1091, relating to wash sales of stocks or securities. 
For certain restrictions on the term as applied to commodity futures see 
subparagraph (2) of this paragraph. Ordinarily, stocks or securities of 
one corporation are not considered substantially identical to stocks or 
securities of another corporation. In certain situations they may be 
substantially identical; for example, in the case of a reorganization 
the facts and circumstances may be such that the stocks and securities 
of predecessor and successor corporations are substantially identical 
property. Similarly, bonds or preferred stock of a corporation are not 
ordinarily considered substantially identical to the common stock of the 
same corporation. However, in certain situations, as, for example, where 
the preferred stock or bonds are convertible into common stock of the 
same corporation, the relative values, price changes, and other 
circumstances may be such as to make such bonds or preferred stock and 
the common stock substantially identical property. Similarly, depending 
on the facts and circumstances, the term may apply to the stocks and 
securities to be received in a corporate reorganization or 
recapitalization, traded in on a when issued basis, as compared with the 
stocks or securities to be exchanged in such reorganization or 
recapitalization.
    (2) Commodity futures. (i) As provided in section 1233(e)(2)(B), in 
the case of futures transactions in any commodity on or subject to the 
rules of a board of trade or commodity exchange, a commodity future 
requiring delivery in one calendar month shall not be considered as 
property substantially identical to another commodity future requiring 
delivery in a different calendar month. For example, commodity futures 
in May wheat and July wheat are not considered, for the purpose of 
section 1233, substantially identical property. Similarly, futures in 
different commodities which are not generally through custom of the 
trade used as hedges for each other (such as corn and wheat, for 
example) are not considered substantially identical property. If 
commodity futures are otherwise substantially identical property, the 
mere fact that they were procured through different brokers will not 
remove them from the scope of the term substantially identical property. 
Commodity futures procured on different markets may come within the term 
substantially identical property

[[Page 310]]

depending upon the facts and circumstances in the case, with the 
historical similarity in the price movements in the two markets as the 
primary factor to be considered.
    (ii) Section 1233(e)(3), relating to so-called arbitrage 
transactions in commodity futures, provides that where a taxpayer enters 
into two commodity futures transactions on the same day, one requiring 
delivery by him in one market and the other requiring delivery to him of 
the same (or substantially identical) commodity in the same calendar 
month in a different market, and the taxpayer subsequently closes both 
such transactions on the same day, section 1233 shall have no 
application to so much of the commodity involved in either such 
transaction as does not exceed in quantity the commodity involved in the 
other. Section 1233(f), relating to arbitrage operations in stocks or 
securities, has no application to arbitrage transactions in commodity 
futures.
    (iii) The following example indicates the application of section 
1233 to a commodity futures transaction:

    Example: A, who makes his return on the basis of the calendar year, 
on February 1, 1955, enters into a contract through broker X to purchase 
10,000 bushels of December wheat on the Chicago market at $2 per bushel. 
On July 1, 1955, he enters into a contract through broker Y to sell 
10,000 bushels of December wheat on the Chicago market at $2.25 per 
bushel. On August 2, 1955, he closes both transactions at $2.50 per 
bushel. The $2,500 loss sustained on the closing of the short sale is a 
short-term capital loss to which section 1233(d) has no application. By 
application of rule (2) in paragraph (c)(2) of this section, however, 
the holding period of the futures contract entered into on February 1, 
1955, is considered to begin on August 2, 1955, the date of the closing 
of the short sale. The $5,000 gain realized upon the closing of such 
contract is, therefore, a short-term capital gain.

    (3) Husband and wife. Section 1233(e)(2)(C) provides that, in the 
case of a short sale of property by an individual, the term taxpayer in 
the application of subsections (b), (d), and (e) shall be read as 
taxpayer or his spouse. Thus, if the spouse of a taxpayer holds or 
acquires property substantially identical to that sold short by the 
taxpayer, and other conditions of subsections (b), (d), and (e) are met, 
then the rules set forth therein are applicable to the same extent as if 
the taxpayer held or acquired the substantially identical property. For 
this purpose, an individual who is legally separated from the taxpayer 
under a decree of divorce or of separate maintenance shall not be 
considered as the spouse of the taxpayer.
    (e) Special rule for short sales by dealers in securities under 
certain circumstances. In the case of a short sale of stock (as defined 
in subparagraph (3) of this paragraph) after December 31, 1957, by a 
dealer in securities, section 1233(e)(4)(A) provides that the holding 
period of substantially identical stock which he has held as an 
investment for not more than 1 year (6 months for taxable years 
beginning before 1977; 9 months for taxable years beginning in 1977) 
shall be determined in accordance with section 1233(b)(2) unless such 
short sale is closed within 20 days of the date on which it was made. 
See rule (2) in paragraph (c)(2) of this section for the purpose of 
determining the holding period of such substantially identical stock. In 
addition, section 1233(e)(4)(B) provides that for the purpose of the 
special rule of section 1233(e)(4)(A), the acquisition of an option to 
sell property at a fixed price shall be considered a short sale, and the 
exercise or failure to exercise such option shall be considered a 
closing of such short sale. For purposes of this paragraph:
    (1) Whether or not a taxpayer is a dealer in securities shall be 
determined in accordance with the meaning of the term for purposes of 
section 1236;
    (2) Whether or not stock is substantially identical with other 
property shall be determined in accordance with the provisions of 
paragraph (d)(1) of this section; and
    (3) The term stock means:
    (i) Any share or certificate of stock,
    (ii) Any bond or other evidence of indebtedness which is convertible 
into a share or certificate of stock, and
    (iii) Any evidence of an interest in, or right to subscribe to or 
purchase, any of the items described in subdivision (i) or (ii) of this 
subparagraph.
    (f) Arbitrage operations in stocks and securities and holding 
periods--(1) General rule. (i) In the case of a short sale

[[Page 311]]

entered into as part of an arbitrage operation, rule (2) of paragraph 
(c)(2) of this section shall apply first to substantially identical 
property acquired for arbitrage operations and held by the taxpayer at 
the close of business on the day of the short sale. The holding period 
of substantially identical property not acquired for arbitrage 
operations shall be affected only to the extent that the amount of 
property sold short exceeds the amount of substantially identical 
property acquired for arbitrage operations and held by the tapayer at 
the close of business on the day of the short sale.
    (ii) If the substantially identical property acquired for arbitrage 
operations is disposed of without closing the short sale so that a net 
short position in assets acquired for arbitrage operations is created, a 
short sale in the amount of such net short position will be deemed to 
have been made on the day such net short position is created. Rule (2) 
of paragraph (c)(2) of this section will then apply to substantially 
identical property not acquired for arbitrage operations to the same 
extent as if the taxpayer, on the day such net short position is 
created, sold short an amount equal to the amount of the net short 
position in a transaction not entered into as part of an arbitrage 
operation.
    (iii) The following examples illustrate the application of rule (2) 
of paragraph (c)(2) of this section to arbitrage operations:

    Example 1. On August 13, 1957, A buys 100 bonds of X Corporation for 
purposes other than arbitrage operations. The bonds are convertible at 
the option of the bondholders into common stock of X Corporation on the 
basis of one bond for one share of stock. On November 1, 1957, A sells 
short 100 shares of common stock of X Corporation in a transaction 
identified and intended to be part of an arbitrage operation and on the 
same day buys another 100 bonds of X Corporation in a transaction 
identified and intended to be part of the same arbitrage operation. The 
bonds acquired on both August 13, 1957, and November 1, 1957, are, on 
the basis of all the facts and circumstances, substantially identical to 
the common stock of X Corporation. On December 1, 1957, A closes the 
short sale with 100 shares of common stock of X Corporation acquired on 
that day. The holding period of the bonds acquired on November 1, by 
application of rule (2) of paragraph (c)(2) of this section, will be 
deemed to begin on December 1 and the holding period of the bonds 
acquired on August 13 will be unaffected. If, instead of purchasing the 
100 shares of common stock of X Corporation on December 1, 1957, A had 
converted the bonds acquired on November 1 into common stock and, on 
December 1, 1957, used the stock so acquired to close the short sale, 
rule (2) of paragraph (c)(2) of this section would similarly have no 
effect on the holding period of the bonds acquired on August 13.
    Example 2. Assume the same facts as in example (1), except that A, 
on December 1, sells the bonds acquired on November 1 (or converts such 
bonds into common stock and sells the stock), but does not close the 
short sale. The sale of the bonds (or stock) creates a net short 
position in assets acquired for arbitrage operations which is deemed to 
be a short sale made on December 1. Accordingly, the holding period of 
the bonds acquired on August 13 will, by application of rule (2) of 
paragraph (c)(2) of this section, begin on the date such short sale is 
closed or on the date of sale, gift, or other disposition of such bonds, 
whichever date occurs first.

    (2) Right to receive or acquire property. (i) For purposes of 
section 1233(f) (1) and (2) and subparagraph (1) of this paragraph, a 
taxpayer will be deemed to hold substantially identical property 
acquired for arbitrage operations at the close of any business day if, 
by virtue of the ownership of other property acquired for arbitrage 
operations (whether or not substantially identical) or because of any 
contract entered into by the taxpayer in an arbitrage operation, he then 
has the right to receive or acquire such substantially identical 
property.
    (ii) The application of section 1233(f)(3) and subdivision (i) of 
this subparagraph may be illustrated by the following example:

    Example: A acquires on August 13, 1957, 100 shares of common stock 
of X Corporation for purposes other than arbitrage operations. On 
November 1, A sells short, in a transaction identified and intended to 
be part of an arbitrage operation, 100 shares of X common stock. On the 
same day, in a transaction also identified and intended to be part of 
the same arbitrage operation, A contracts to purchase 100 shares of 
preferred stock of X. The preferred stock of X may be converted into 
common stock of X on the basis of one share of preferred stock for one 
share of common stock. The preferred stock is not actually delivered to 
A until November 3. Since A has contracted before the close of business

[[Page 312]]

on the date of the short sale, as part of an arbitrage operation, to 
purchase property by virtue of which he has the right to receive or 
acquire substantially identical property to that sold short, he will be 
deemed, for purposes of section 1233(f) (1) and (2), to hold such 
substantially identical property at the close of business on the date of 
the short sale. For purposes of this subparagraph, it is immaterial 
whether, on the basis of all the facts and circumstances, the preferred 
stock of X is substantially identical to the common stock of X. The 
short sale on November 1 does not affect the holding period of the 100 
shares of X Corporation common stock purchased on August 13, 1957. 
Because of the operation of rule (2) of paragraph (c)(2) of this 
section, the holding period of the preferred stock acquired as the 
result of A's contract to purchase it as part of an arbitrage operation 
(or the common stock which A acquires by conversion of such preferred 
stock into common stock) will not begin until the short sale entered 
into in the arbitrage operation is closed.

    (3) Definition of arbitrage operations. For the purpose of section 
1233(f), arbitrage operations are transactions involving the purchase 
and sale of property entered into for the purpose of profiting from a 
current difference between the price of the property purchased and the 
price of the property sold. Assets acquired for arbitrage operations 
include only stocks and securities and rights to acquire stocks and 
securities. The property purchased may be either identical to the 
property sold or, if not so identical, such that its acquisition will 
entitle the taxpayer to acquire property which is so identical. Thus, 
the purchase of bonds or preferred stock convertible, at the holder's 
option, into common stock and the short sale of the common stock which 
may be acquired therefor, or the purchase of stock rights and the short 
sale of the stock to be acquired on the exercise of such rights, may 
qualify as arbitrage operations. A transaction will qualify as an 
arbitrage operation under section 1233(f) only if the taxpayer properly 
identifies the transaction as an arbitrage operation on his records as 
soon as he is able to do so. Such identification must ordinarily be 
entered in the taxpayer's records on the day of the transaction. 
Property acquired in a transaction properly identified as part of an 
arbitrage operation is the only property which will be deemed acquired 
for an arbitrage operation. The provisions of section 1233(f) and this 
paragraph shall continue to apply to property acquired in a transaction 
properly identified as an arbitrage operation although, because of 
subsequent events, e.g., a change in the value of bonds so acquired or 
of stock into which such bonds may be converted, the taxpayer sells such 
property outright rather than using it to complete the arbitrage 
operation.
    (4) Effective date of section 1233(f). Section 1233(f), relating to 
arbitrage operations involving short sales of property, is effective 
only with respect to taxable years ending after August 12, 1955, and 
only with respect to short sales made after such date.

[T.D. 6500, 25 FR 12011, Nov. 26, 1960, as amended by T.D. 6494, 25 FR 
9372, Sept. 30, 1960; T.D. 6926, 32 FR 11468, Aug. 9, 1967; T.D. 7728, 
45 FR 72650, Nov. 3, 1980]