Commodities Weekly Summary: Weather, War, and Debt Broaden the Commodity Rally

Author: Ole Hansen, Head of Commodity Strategy

Date: August 21, 2026

Key Points

• The Bloomberg Commodity Total Return Index (BCOMTR) rose approximately 3% this week, achieving a year-to-date return of 30%.
• Multiple forms of scarcity, including geopolitical disruptions, energy flow constraints, tightening agricultural supply, and volatile weather, are driving the commodity rally.
• Soft commodities have led gains, particularly due to intensified El Niño risks and disruptions in Black Sea grain exports.
• Concerns about fiscal sustainability and currency debasement are strengthening the case for hard assets, although risks remain.

Broadening Commodity Rally

The recent commodity rally is characterized by a broadening base of support, with the BCOMTR gaining 3.3% this week and a 12-month gain of around 44%. Unlike previous rallies dominated by single sectors, this advance reflects multiple independent drivers, including:

• Physical supply constraints
• Geopolitical fragmentation
• Weather volatility
• Concerns about fiscal sustainability

The performance gap between commodity spot prices and total returns is notable, with the BCOM Spot Index up 23% year-to-date, while the BCOMTR has gained 30.5% due to positive roll yields in backwardated markets.

Agricultural Commodities on the Rise

Agriculture has become a significant contributor to the rally, with soft commodities leading the way. The developing El Niño is expected to disrupt weather patterns in major agricultural regions, affecting crops like coffee, cocoa, and sugar. The UN Food and Agriculture Organization reported a rise in its Food Price Index, with cereal prices increasing by 3.4% and sugar by 5.6% in July.

Additionally, geopolitical tensions in the Black Sea are disrupting grain exports, with Ukraine reducing its grain export forecast due to Russian attacks. Chicago corn futures have also risen to an 18-month high due to concerns over crop yields.

Bond Market Developments

Outside the commodity markets, the US Treasury's announcement to double liquidity-support buybacks for longer-dated government bonds has implications for hard assets. Initially, this intervention led to a rally in long-dated bonds and a weaker dollar, benefiting hard assets. However, skepticism remains regarding the effectiveness of such measures in addressing persistent fiscal deficits and rising government debt.

The market's reaction suggests that while liquidity operations can support market functioning, they do not resolve underlying fiscal issues, which could challenge the sustainability of commodity rallies.

Conclusion

The current commodity rally is increasingly supported by various independent forms of scarcity, including supply constraints, geopolitical disruptions, and fiscal concerns. While the risk of corrections and profit-taking exists after a 30% year-to-date return, the broader foundation of this rally distinguishes it from earlier, more isolated advances. In a world facing challenges to abundant supply and stable purchasing power, commodities are reaffirming their role in diversified portfolios.

This summary reflects a market perspective and is not a recommendation for investment decisions.