Evaluating investment quality is
an important part
of any investment decision. However, with some
investments, quality may be difficult
to judge.
For example, if you're
considering a bond that has
been issued to finance a project
hundreds of miles
away, you probably won't be able to
drive by the site
to evaluate the project. You also might not have the
time or expertise to investigate the
issuer's financial
stability. You can read the offering documents and
financial statements but may still be
unable to make a
professional judgment.
That's where bond ratings can
help. In 1909, John
Moody originated a system of rating
securities to
provide investors with a relatively
simple way to
evaluate investment quality. Today, two investment
rating services are primarily used in
the securities
industry: Moody's and Standard & Poor's. They are
similar in the way they classify
bonds, and they are
the most used and respected rating
services available.
To help you understand bond
ratings, let's look at
the Moody's system. Moody uses nine major symbols to
rate bonds. From highest to lowest in investment
quality, they are Aaa, Aa, A, Baa,
Ba, B, Caa, Ca and
C.
The lower the rating, the lower the investment
quality. The Standard & Poor's ratings are
similar.
From highest to lowest in investment
quality, they are
AAA, AA, A, BBB, BB, B, CCC, CC, C
and D.
Some bonds may be non-rated
(NR). In some cases,
this indicates low investment
quality. In other cases,
bonds may be non-rated for reasons
unrelated to
quality. For example, because issuers of tax-free and
corporate bonds must apply for a rating
and pay a fee,
they may decide simply to not
apply. A bond may also
be non-rated if the issue is very
small, if there is a
lack of essential data relating to
the issuer or if the
issue is privately placed with
institutional investors.
In addition, ratings are not
permanent. Many
bonds are long-term, and
circumstances affecting their
ratings may change over time. Issuers of previously
rated bonds are periodically reviewed
by the rating
services. If their financial condition changes, so may
the bond rating. The current rating reflects the best
judgment of investment quality at the
current time.
Therefore, when purchasing
tax-free or corporate
bonds, it is vital to monitor ratings
regularly to be
aware of any changes in investment
quality.
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