by Seth J. Masters, AllianceBernstein

Seth J. Masters and Jon Ruff

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Several prominent pension funds have slashed their commodity futures investments for delivering poor returns with higher volatility than usual, while failing to diversify equity exposures as expected, The Wall Street Journal recently reported. If inflation rises, they may regret it.

Our research shows that commodity futures have performed poorly in recent years for two reasons that we’ve seen before: new technology has disrupted pricing for key commodities, and fears of deflation, rather than inflation, have dominated the market for much of the last five years. We don’t expect either condition to last.

Commodity future indices have been and are likely to remain highly sensitive inflation hedges that provide their benefits in periods when they are  needed most—when rising inflation depresses stock and bond returns.

Thus, we think many investors would benefit from a strategic allocation to a diversified set of real assets that includes commodity futures.

Technology Drove Poor Returns

Investor dismay with the returns from commodity futures in recent years is understandable. The annualized return of the Dow Jones-UBS Commodity Index (DJ-UBSCI), which reflects a broad basket of commodities, was seven percentage points below inflation, as measured by the Consumer Price Index (CPI), over the five years ending in December 2012. By contrast, the index’s annualized returns were five percentage points above inflation in the 17 years ending in December 2007.

Like all risk assets, commodities futures indices traded down sharply during the financial crisis in 2008. Their failure to rebound with stocks, high-yield bonds and some types of real estate in the subsequent years can be traced to very poor returns for two futures contracts: WTI Crude Oil (down 16.1% a year, annualized for five years) and Natural Gas (down 41.1% a year!).

Why? Technology is the enemy of commodities. In this case, the introduction of hydraulic fracturing, horizontal drilling and other technologies that sparked the US shale revolution drove oil and gas supplies up—and returns for the futures contracts down.

We expect returns for oil and gas futures to normalize as storage and distribution infrastructure for oil and gas improves and as end-market demand increases to absorb the new supply. Overall, we expect the annualized returns of broad commodity indices to normalize at around CPI plus 2% over the long term, with much of the 2% real return coming from passive rebalancing within the index.

High Correlations when Inflation Low

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