A hedge fund index reflects the average performance of hedge
funds and makes that information available to those who seek it out. It may be
investable or non-investable (and, in such cases, purely informative rather
than an investment opportunity), and hedge fund indices are quite different
depending on which “method” is used to collect and analyze the data. This is a
simplistic outline of the different types of hedge fund indices, how they work,
and some of the issues that arise with using hedge fund indices in the first
place.
First, the question of usability must be brought up. Many
people argue that hedge fund indices are unsubstantiated, are prone to bias,
and cannot be relied upon. It is true that much of hedge fund index information
is self-reported by hedge fund companies, which can lead to a bias. As hedge
funds are private investments, there is no central agency to which they must report,
and that makes finding hedge funds willing to divulge their returns and
performance problematic in many cases. Do not forget that hedge funds are
incredibly diverse, as well, and that information on one hedge fund may not
remotely resemble information on another. This can make it even more difficult
to collate data on hedge fund performance in a cohesive way.
The first form of a hedge fund index is known to be a
non-investable index. This type is the one most prone to self-selection bias,
as all performance information gleaned from hedge funds was gotten voluntarily.
A non-investable index tracks performance in a variety of ways, using mean,
median, and weighted mean, and as such, any result from a database search may
not match another. Some people still consider it a valuable tool – and any
information is better than absolutely no information, in any case.
The second form is the investable index. The main difference
is that investment portfolios are created by the index manager, and interested
shareholders can invest in the portfolios (as long as they accept all of the
terms set forth by the index provider). This creates a functioning investment
opportunity, very similar to a hedge fund portfolio in and of itself.
Finally, there is hedge fund replication. This tracks the
historical performance of hedge fund returns, and using the data discovered,
creates models that illustrate how hedge fund returns will behave under
different investment scenarios.This model is also turned into a portfolio that
can be invested in. This is the newest of the three forms of hedge fund
indices, and because of its newness, there are still questions as to how well
this hedge fund replication index method will work in the long term. It is not
yet known how accurate hedge fund replication may be in practice.
Despite the drawbacks to using any of the hedge fund
indices, there are some definite bonuses. Financial experts (and money
managers) are able to study the hedge fund market to better understand how it
functions and changes, and can adjust their strategies accordingly.
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