Group 1 - The domestic futures market closed mostly lower on December 9, with industrial silicon futures dropping by 3.47%, while other commodities like coke, fuel oil, crude oil, and coking coal also fell by over 2.0% [1] - Conversely, polysilicon futures increased by 3.45%, along with live pig futures and fiberboard futures, which rose by over 1.0% [1] Group 2 - The leading futures contracts that gained included polysilicon with a rise of 3.45% to a price of 55,610 yuan and a trading volume of 26.205 billion yuan, and live pig futures which increased by 1.55% to 11,450 yuan with a trading volume of 16.889 billion yuan [2] - The leading futures contracts that declined included industrial silicon, which fell by 3.47% to 8,340 yuan with a trading volume of 13.645 billion yuan, and coke futures which dropped by 2.7% to 1,514 yuan with a trading volume of 2.181 billion yuan [2]

Group 1 - The domestic futures market closed mostly lower on December 8, with coking coal futures dropping by 6.14% and other commodities like coking coal,胶版纸, polysilicon, and urea futures falling over 2.0% [1] - Conversely, live hog futures increased by 2.29%, along with low-sulfur fuel oil and silver futures, which both rose over 2.0% [1] Group 2 - The leading gainers in the futures market included live hog futures with a rise of 2.29% to a price of 11,385 yuan and a trading volume of 9.654 billion yuan [2] - Other notable gainers were low-sulfur fuel oil futures, which increased by 2.18% to 3,089 yuan with a trading volume of 271.6 million yuan, and silver futures rising by 2.06% to 1,370.6 yuan with a trading volume of 1.7937 billion yuan [2] - The leading decliners included coking coal futures, which fell by 6.14% to 1,093.57 yuan with a trading volume of 503.7 million yuan, and coking coal futures dropping by 5.79% to 1,537.03 yuan with a trading volume of 95.4 million yuan [2]