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A security is a financial
instrument, but not all financial instruments are securities. When people
think of securities, it is usually
stocks or bonds that come to mind. If we are very liberal with
our interpretation of what constitutes a stock or bond, this is a
reasonable definition—every security is some sort of
equity or debt interest.
The only precise definition of security is that a security
is whatever
US law says it is. In the depths of the Great Depression, Congress
passed two acts:
the
1933
Securities Act, and
the
1934
Securities Exchange Act.
The
Securities
and Exchange Commission (SEC) is the primary regulator of US
securities markets. The acts granted certain securities exemptions from
most SEC oversight. These are called exempt
securities. Today they include
Treasury
and municipal securities,
commercial
paper and bankers acceptances with
terms up to nine months, and
private
placements.
A financial interest is said to be securitized
when it is legally structured or packaged as a security. This terminology
is most commonly used in the context of
securitizations.
The 1933 and 1934 Acts define what is or is not a security. Both acts
contain similar language. The 1933 act states
The term "security" means any note, stock, treasury
stock, security future, bond, debenture, evidence of indebtedness,
certificate of interest or participation in any profit-sharing agreement,
collateral-trust certificate, preorganization certificate or subscription,
transferable share, investment contract, voting-trust certificate,
certificate of deposit for a security, fractional undivided interest in
oil, gas, or other mineral rights, any put, call, straddle, option, or
privilege on any security, certificate of deposit, or group or index of
securities (including any interest therein or based on the value thereof),
or any put, call, straddle, option, or privilege entered into on a
national securities exchange relating to foreign currency, or, in general,
any interest or instrument commonly known as a "security", or any
certificate of interest or participation in, temporary or interim
certificate for, receipt for, guarantee of, or warrant or right to
subscribe to or purchase, any of the foregoing.
Because many of the terms in this definition are themselves not clearly
defined, there may be uncertainty about whether specific instruments or
transactions legally are securities. In the 1940 case SEC vs. WJ Howey
Co., the Supreme Court decided that a sale of a portion of an orange
grove bundled with a contract to harvest the oranges and distribute
profits did constitute a security. In that case, the court concluded that
a transaction should be subject to securities laws if
... the scheme involves the investment of money in a
common enterprise with profits to come solely from the efforts of others.
Conventionally, common stock,
preferred stock,
bonds,
securitizations, shares of
mutual funds and structured notes are all considered securities. Currencies, bank
loans, most insurance policies, lottery tickets and
derivatives are not
securities. Futures are a special case. While
they were included in the 1933 Act's definition, they are regulated by the
Commodity Futures Trading
Commission (CFTC) rather than the SEC. Most practitioners would not
consider them to be securities.
Years ago, John Hull entitled the first and second
editions of his seminal book on financial engineering Futures, Options,
and Other Derivative Securities. By the third edition, he realized his
mistake. It and subsequent editions have been entitled Futures,
Options, and Other Derivatives. It is a testament to the influence of
that book that other authors copied the error. Even today, you will
occasionally hear derivatives erroneously referred to as securities.
Outside the US, the term security is used much as
described here, although different legal jurisdictions may not conform to
definitions specified by US law.
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