A Dynamic Commodities Allocation: The Forgotten Diversifier

Commodities deserve a strategic allocation because supply constraints and inflation shocks can provide portfolio resilience when stocks and bonds are exposed to the same pressures.

• A broad commodities basket was up nearly 40% year-to-date, while U.S. inflation stood at 3.7% year-over-year and had remained above the Federal Reserve's 2% target for more than five years.
• Using quarterly data from Q2 1973 to Q3 2026, PGIM finds that commodities delivered materially positive nominal and real annualized returns during periods when U.S. inflation exceeded 3%, while U.S. equities and Treasuries produced real returns closer to zero.
• Five-year rolling correlations through September 2026 show that commodities offered a different diversification profile from bonds as the stock-bond relationship changed, reflecting exposure to physical supply and demand rather than mainly to discount rates, earnings, and credit conditions.
• Commodity markets respond differently to inventories, weather, production economics, policy, and end-user demand, so a broad allocation should account for inflation, growth, liquidity, cyclicality, concentration, and futures-curve conditions.
• PGIM's quarterly analysis from Q2 1992 to Q3 2026 indicates that relying only on curve carry can weaken diversification when stocks and bonds fall, whereas combining carry, realized skewness, sentiment, and fundamentals can spread exposure across distinct return drivers.

Takeaway: Investors should treat commodities as a diverse and actively managed asset class with inflation sensitivity and differentiated return drivers, while recognizing that allocations remain cyclical and can still lose money.