J.D. Steinhilber is the founder and CEO of AgileInvesting, an investment advisory firm that develops all-ETF portfolios using an active asset allocation strategy driven by valuation fundamentals and risk reduction.

Steinhilber, who has been investing in commodities since they were first made available in an ETF format, spoke with the editors of HardAssetsInvestor.com about how commodities fared in 2008 ... and what role they should play in investors' portfolios in 2009.

HardAssetsInvestor.com (HAI): The downturn in 2008 for commodities was awful. I thought they were supposed to protect portfolios during market downturns. What happened?

J.D. Steinhilber, founder, AgileInvesting (Steinhilber): Other than gold, I don't think commodities protect you in a deflationary/deep recessionary bust like we had recently. I don't think they are a good hedge in that kind of environment.

Also, given the fact that commodities ran up so much in the first half of 2008, primarily due to the extreme weakness in the dollar, they were set up for a ferocious correction. They were severely stretched to the upside by midsummer, so when the financial crisis hit and it became clear that we were entering a deep global recession, they faced very, very powerful headwinds.

The other factor at work was the deleveraging of the Financials sector. Investors were long commodities on a leveraged basis and needed to unwind those positions. I also think, however, that there were a lot of uncommitted retail investors who had just gotten into commodities, and I think they started to rethink their commitment to the asset class.

Commodities are an unconventional asset class, and it has only been in the relatively recent past that investors have gotten comfortable with the idea of allocating a percentage of their portfolio on a long-term basis to commodities. Just as many abandoned stocks in the fall, a greater percentage probably abandoned commodities.

HAI: But still ... the violent nature of the fall was surprising.

Steinhilber: Well, if you take a step back and just look at the magnitude of the overall decline, it's less shocking. Commodity indexes got cut in half over six months, while equity indexes got cut in half over 12 months. Both lost the same in value; it was just more intense and dramatic in commodities.

The people who really got hurt were the latecomers to the commodities party; the ones who invested at the worst possible times.