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The US Treasury does not issue
zero-coupon securities with
maturities greater than a year, but it has a program whereby the
coupon and
principal payments of
standard Treasury securities can be disaggregated and traded separately as
zero-coupon securities. This is called the STRIPS
program, which the Treasury launched in 1985. STRIPS stands for Separate
Trading of Registered Interest and Principal of Securities.
Under the program, a financial institution can present the
Treasury with a standard Treasury note,
Treasury bond or
TIPS to be
"stripped." The Treasury disaggregates the individual cash flows into
separate securities, which are returned to the financial institution. For
example, a newly issued 5-year note would be stripped into eleven separate
securities—ten representing the note's semiannual coupon
payments, and one representing its final principal payment. The new
securities are called coupon strips and
principal strips. Collectively, they are called
Treasury strips or just
strips.
To an investor, there is no practical difference between a
coupon strip and a principal strip. Both are
zero-coupon Treasury securities.
But there is a technical difference. Each issue of Treasury securities is
identified with a unique CUSIP number. When a note or bond is stripped,
each new security receives a different CUSIP. Coupon strips maturing on
the same date, even if they are stripped from different issues of notes or
bonds, are given the same CUSIP. This makes them fungible. The principal
strips are each given a unique CUSIP identifying it with
the particular note or bond issue from which it was stripped.
This is important because, in addition to disaggregating
securities under the STRIPS program, the Treasury will also reconstitute
them. A financial institution must obtain the principal strip for the
security to be reconstituted (identified by CUSIP) as well as coupon strips
maturing on all that security's coupon dates. The Department of Treasury
takes these and returns the reconstituted security.
TIPS are handled similarly. Coupon strips that mature on
the same date are all given the same CUSIP, although this differs from the CUSIP of note or
bond coupon strips maturing on that date. The principal strip for each
TIPS is given a unique CUSIP identifying it with the particular TIPS issue from
which it was stripped. They too can be reconstituted.
There is an active market for note and bond strips.
These are widely held by both
institutional and retail clients. There is little
liquidity in TIPS strips. See the article
Treasury Securities for more information on the secondary market
for Treasuries.
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