商品日报（12月15日）：铂钯表现活跃铂金封板涨停 氧化铝多晶硅涨超3%

Group 1: Market Overview - The domestic commodity futures market showed overall strength on December 15, with the China Securities Commodity Futures Price Index closing at 1512.37 points, up 0.64 points or 0.04% from the previous trading day [1] - The commodity futures index closed at 2089.21 points, with a slight increase of 0.06 points, reflecting a stable market [1] Group 2: Precious Metals Performance - Platinum prices surged to a limit-up, marking a 7.00% increase and reaching a historical high, driven by supply shortages and strong demand from the hydrogen energy sector [2] - Palladium also saw a significant rise of over 4%, benefiting from the bullish trend in platinum [2] - Gold's strong performance laid the foundation for the overall strength in the precious metals sector, despite silver experiencing volatility [2] Group 3: Silicon Market Dynamics - The main contract for polysilicon rose by 3.61%, nearing its historical high from earlier in the month, primarily due to the announcement of a capacity integration acquisition platform [3] - However, the supply-demand dynamics for polysilicon remain weak, with inventory levels reaching 293,000 tons, sufficient for nearly two months of production [3] - Production cuts in the silicon wafer segment were noted, with a significant reduction of over 10% in November and a further expected decrease in December [3] Group 4: Agricultural Products and Copper - The new season apples faced downward pressure, dropping over 3% due to an oversupply in the market and weak demand ahead of the holidays [4] - Copper prices experienced a decline of over 1% after reaching historical highs, influenced by increased inventories and expectations of weakened demand [5] - Domestic electrolytic copper inventories rose to 177,200 tons, indicating a supply surplus that may pressure prices further [5]