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March 02 2012 | Filed Under Active Trading , Commodities
Most people picture a trading floor at a futures exchange as a scene of utter
chaos, with fierce shouting matches, frantic hand signals and high-strung
traders jockeying to get their orders executed; their picture is not far off.
These markets are the meeting places of buyers and sellers of an ever-expanding
list of commodities that today includes not only agricultural goods, metals and
petroleum, but also products such as financial instruments, foreign currencies
and stock indexes that trade on a commodity exchange.
At the center of this supposed disorder are products that offer a haven of
sorts - a hedge against inflation. Because commodities prices usually rise when
inflation is accelerating, they offer protection from the effects of inflation.
Few assets benefit from rising inflation, particularly unexpected inflation,
but commodities usually do. As demand for goods and services increases, the
price of goods and services usually rises too, as does the price of the
commodities used to produce those goods and services. Futures markets are then
used as continuous auction markets and as clearing houses for the latest
information on supply and demand.
How Commodities Are Traded
Trading futures is the purest way to invest in commodities. To trade
commodities, an individual trading account can be opened either directly with a
futures commission merchant or indirectly through an introducing broker.
Another way to trade commodities is through a managed account, where you give
someone a written power of attorney to make and execute decisions about what
and when to trade. They will have discretionary authority to buy or sell for
your account or will contact you for approval to make trades, or you can hire a
commodity trading advisor for a fee. Lastly, ever increasingly popular methods
of diversified investing in commodities include commodity pools (limited
partnerships) or commodity-related mutual funds.
Benchmarks for Broad Commodity Investing
Two of the most common commodity indexes are the Goldman Sachs Commodities
Index (GSCI) and the Dow Jones-USB Commodity Index (DJ-USBCI).
The GSCI is a composite index of commodity sector returns, representing an
un-leveraged, long-only investment in commodity futures that is broadly
diversified across the spectrum of commodities. The quantity of each commodity
in the index is determined by the average quantity of production in the last
five years of available data. When used as an economic indicator, this index
will assign a weighting to each commodity in proportion to the amount of that
commodity flowing through the economy.
The DJ-USBCI is designed to be a highly liquid index that represents fairly the
importance of a diversified group of commodities to the world economy. To avoid
overexposure of a particular commodity, the index does not allow any related
group of commodities (e.g., energy, precious metals or grains) to make up more
than 33% of the index. This forbids a disproportionate weighting of any
particular commodity or sector which could negate the concept of a broad-based
commodity index and thereby increase volatility.
The major distinction between the two indexes is that the GSCI uses a strategy
of overweighting the appropriate commodity sector (e.g., energy, metal or
agriculture) based on economic demand. The DJ-USBCI on the other hand relies on
both production and liquidity in determining weightings but has stricter
guidelines on the maximum percentages allowed in one particular sector.
Why Commodities Add Value
Commodities tend to bear a low to negative correlation to traditional asset
classes like stocks and bonds. A correlation coefficient is a number between -1
and 1 that measures the degree to which two variables are linearly related. If
there is perfect linear relationship, you'll have a correlation coefficient of
1. A positive correlation means that when one variable has a high (low) value,
so does the other. If there is a perfect negative relationship between the two
variables, you'll have a correlation coefficient of -1. A negative correlation
means that when one variable has a low (high) value, the other will have a high
(low) value. A correlation coefficient of 0 means that there is no linear
relationship between the variables.
Typically, U.S. equities whether in the form of stocks or mutual funds are
closely related to each other and tend to have positive correlation with one
another. Commodities, on the other hand, are a bet on unexpected inflation and
they have a low to negative correlation to other asset classes.
Source: "Commodities As An Asset Class," Frank Armstrong III, CFP ,
www.investorsolutions.com
Commodities have offered superior returns in the past, but they still are one
of the more volatile asset classes available. Make no mistake, they do carry a
higher standard deviation (or risk) than most other equity investments.
However, by adding commodities to a portfolio of assets that are less volatile,
you actually decrease the overall portfolio risk due to the negative
correlation and in most cases increase your overall expected return.
How to Invest
Individual commodity futures are an investment for more sophisticated
investors. For most investors the most suitable way to invest in commodities is
through a mutual fund. They can be purchased through a 'natural-resources
fund,' which buys companies associated with the mining or production of
commodities, such as Exxon/Mobil or Schlumberger, to name a few. Or,
commodities can be purchased through a 'raw-commodity fund,' which actually
invests in commodity-linked derivative instruments backed by fixed-income
investments.,
In order to get the true diversification value of commodities and the negative
correlation to stock returns, you'll need to seek out funds with direct
commodity investments since buying a natural-resources fund will typically just
add more stock holdings to your portfolio. Two options would be the 'PIMCO
Commodity Real Return Strategy Fund' (which uses the DJ-USBCI as an index) or
the 'Oppenheimer Real Asset Fund' (uses the GSCI as the index). Several
exchange-traded funds based on commodity indexes are being planned for the
future.
The Bottom Line
During inflationary times, many investors look to asset classes like
real-return bonds and commodities (and possibly foreign bonds and real estate)
to protect the purchasing power of their capital. By adding these diverse asset
classes to their portfolios, investors seek to provide multiple degrees of
downside protection and upside potential. What is important is that you draw
the line on the maximum correlation of returns you will accept between your
asset classes, and choose your asset classes wisely. Given the unique negative
correlation that raw commodities have to stocks and bonds, they can be a
well-advised addition to almost every long-term investment portfolio.
by Steven Merkel