Commodities in the Investment Portfolio

Including commodities in the investment portfolio is a debated but important topic for institutional investors. Arguments “for”: inflation protection, diversification (low correlation with stocks and bonds), exposure to long-term structural trends. Arguments “against”: negative roll yield in contango, high volatility, weak long-term returns in real terms.

Historical data on commodity returns. Global commodity benchmarks — Bloomberg Commodity Index (BCOM) and S&P GSCI. Long-term real returns on commodities are close to zero or negative — they do not generate cash flows (unlike stocks and bonds). However, during periods of high inflation, commodities significantly outperform financial assets. Correlation with inflation (0.4–0.6) is among the best across asset classes.

Instruments for investing in commodities. Commodity futures (direct): via ETFs (such as GSCI, DJP) or managed futures funds. Receive full commodity exposure, but bear roll costs. Commodity stocks (shares of extraction companies): Exxon, BHP, Glencore, Barrick Gold. Higher expected return (equity premium), but correlation with commodity is not full. Real assets directly: physical gold (ETFs like GLD store physical gold in vaults).

Strategic allocation of commodities. Pension funds: historically 3–7% of portfolio in commodities and real assets. Sovereign Wealth Funds: often hold direct investments in extraction companies. Endowments: Yale Model includes significant investments in commodities and real assets. Tactical allocation: increase during periods of inflationary pressure. Factor strategies in commodities: momentum (following price trends), carry (preference for backwardation markets), value (cheap vs expensive relative to historical norms). CTAs (Commodity Trading Advisors) are the largest participants in futures markets, mainly trend-following.