Sep 17 2008
Do Not Abandon Commodities
Even though our commodities ETF (GSG) is in a swoon, we want to maintain our target in those portfolios that include this asset class. Check out this article which provides support for our position. For those of you who have read Roger Gibson’s book, remember how commodities rarely led the four major asset classes, but when it did it made a major impact on the overall portfolio performance.
To review Gibson’s four-factor model, you will recall he use the S&P 500, EAFE, NAREIT, and GSCI for his four indexes over the 27-year study. Commodities (GSCI) had 5 first-place finishes while International (EAFE) and REITs (NAREIT) had 7 and 10 first-place finishes respectively. By comparison, the S&P 500 also came in first only five times.
What is interesting in the Gibson study is that a four-factor model ends up with a better return/volatility ratio than any one, two, or three-factor model. Diversification works whether or not you want it to. Do a search for Information Ratio to learn more about the return/volatility ratio.
In our seven portfolios, we take the multiple factor model to a new level as we hold a minimum of eight (and usually higher) different asset classes.
Going back over Gibson’s material, I see where he recommends one not hold less than 5% in any asset class. We have 3% set for some of our asset classes so that may require another look. The idea is that if one does not hold at least 5% in an asset class, whatever that asset class does, it will not have a significant impact on the overall portfolio. When Gibson ran his four-factor model, he placed equal percentages in each of the four asset classes.
Coming back to the original argument, do not abandon commodities even though they are in a correction faze. Stay the course and be consistent with your asset allocation strategy.
Lowell Herr
Photograph: Villefranche, France
More detailed information is available via Premium Content. Subscription price is $6.99 per month.
Sphere: Related Content

