NEW YORK – October 30, 2026 -- Bloomberg raised the Bloomberg Commodity Index (BCOM) target weight for Precious Metals to 19.49% for 2027, the group's second-highest level in the index's history, while Grains fell to a record-low 20.61%.
The index will keep its 25 exchange-traded contracts on physical commodities. The new weights take effect during the January 2027 roll period.
Silver and gold lift Precious Metals to its second-highest weight on record
Silver's weight rose to 4.56%, driving the Precious Metals increase. Gold's weight edged up to 14.93%, just below the index's 15% single-commodity cap, and Gold remains the largest individual component.
Corn, soybeans and wheat each hit record-low weights, pushing Grains to 20.61%
All three commodities reached their lowest target weights in BCOM history. Grains recorded the sharpest structural decline among the commodity groups.
Brent reaches a record 8.59% as WTI drops to a record-low 6.41%
Energy slipped to 29.37%, its third consecutive annual decline, but stays the largest commodity group. The split between the two crude benchmarks continued to widen.
Livestock rises to 5.94% while Softs slip to 8.84%
Livestock increased from 5.64% on a higher Live Cattle weighting. Softs declined from 9.17%. Industrial Metals stayed largely flat at 15.75%.
Liquidity-heavy methodology caps group, commodity and derivative exposure
BCOM weights liquidity at two-thirds and world production at one-third. Diversification rules limit any group to 33% and any single commodity, together with its derivatives, to 25%. No single commodity may exceed 15%. Each commodity must hold at least 2% of the index where liquidity allows.
BCOM launched in 1998, with historical data going back to 1960.