Group 1 - The domestic futures market closed mostly lower on December 19, with the average monthly price of plastic futures dropping by 2.91% [1] - Major declines were observed in plastic, aluminum oxide, vegetable oil, and glass futures, all falling over 2.0% [1] - Conversely, lithium carbonate futures increased by 3.86%, while paraxylene and European shipping futures rose by over 3.5% [1] Group 2 - The leading gainers included lithium carbonate futures, which rose by 3.86% to a price of 111,400 yuan, with a trading volume of 1.94 billion yuan [2] - Other notable gainers were paraxylene futures, up by 3.77%, and European shipping futures, which increased by 3.66% [2] - The leading decliners included plastic monthly average futures, which fell by 2.91% to 62,480.01 yuan, with a trading volume of 1.55 billion yuan [2]

Group 1 - The domestic futures market saw most contracts rise, with platinum leading the gains at 7.0% [1] - Other notable increases included palladium at 4.7%, polysilicon at 3.6%, European shipping at 3.3%, and coking coal at 3.1% [1][2] - Conversely, apple futures fell by 2.95%, with other declines including vegetable oil at 1.9% and international copper at 1.4% [1][2] Group 2 - The closing prices and trading volumes for the leading gainers included platinum at 482.42 yuan with a transaction volume of 198.34 billion yuan, and palladium at 407.61 yuan with 24.13 billion yuan [2] - The leading losers included apple futures at 9232.02 yuan with a trading volume of 10.98 billion yuan, and vegetable oil at 9196.02 yuan with 203.05 million yuan [2]