美国商品期货交易委员会（CFTC）补充发布12月9日当周持仓报告。CBOT大豆净多头头寸减少35,088手合约。WTI原油净多头头寸增加40,170手合约。COMEX铜增加6,879手合约。

Group 1: Agricultural Commodities - CBOT soybean net long positions decreased by 35,088 contracts, representing a 16.30% decline from the previous week [1][2] - Corn net long positions fell by 13,552 contracts, a significant decrease of 58.20% [2] - Wheat CB net positions decreased by 2,228 contracts, showing a 5.10% decline [2] - Sugar net positions improved by 9,627 contracts, reflecting a 5.10% increase [2] - Cocoa net positions increased by 3,664 contracts, marking a 23.40% rise [2] - Live cattle net positions rose by 6,082 contracts, a 7.40% increase [2] - Lean hogs net positions increased by 4,821 contracts, showing a 10.30% rise [2] Group 2: Energy Commodities - WTI crude oil net long positions increased by 40,170 contracts, with no previous week comparison available [1][2] - Natural gas net positions improved by 9,043 contracts, reflecting a 22.70% increase [2] - Gasoline net positions decreased by 10,782 contracts, a decline of 11.20% [2] - Heating oil net positions fell by 1,230 contracts, showing a 5.90% decrease [2] Group 3: Metals - Gold net positions increased by 4,829 contracts, representing a 4.00% rise [2] - Silver net positions rose significantly by 6,724 contracts, a 31.60% increase [2] - Copper net positions increased by 6,879 contracts, reflecting a 10.70% rise [1][2] - Platinum net positions improved by 3,048 contracts, marking a 28.40% increase [2]