商品日报（10月31日）：碳酸锂跌超3% 三大橡胶全线下挫

Group 1 - Domestic commodities mostly declined on October 31, with lithium carbonate dropping over 3%, and other commodities like 20 rubber, methanol, and silicon iron falling over 2% [1][5] - The China Securities Commodity Futures Price Index closed at 1474.01 points, down 3.29 points or 0.22% from the previous trading day [1] - The main contract for polysilicon rose by 2.73%, driven by positive rumors regarding "storage" initiatives, reaching a two-month high [2] Group 2 - Precious metals, including gold and silver, recorded gains of over 1%, influenced by overseas market conditions and ongoing uncertainties in the U.S. economy [3] - The market for polysilicon is expected to see a supply contraction in November, further supporting price increases despite weak demand [2] - Other commodities like soybean meal, No. 2 yellow soybeans, and corn showed slight increases, contrasting with the overall market trend [4]