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According to Sinochem New Network, last week (from December 29 to 31, 2025), there were only 3 trading days. During that period, the chemical sector index within the oil and chemicals index fell in all cases, while the oil sector index rose in all cases. In the chemicals sector, the chemicals raw materials index has fallen by 0.65% on a cumulative basis, the chemical machinery index has dropped by 2.97%, the chemical pharmaceuticals index has declined by 2.19%, and the pesticides and fertilizers index has fallen by 0.73% on a cumulative basis ； In the oil sector, the oil processing index has risen by 6.19% on a cumulative basis, the oil extraction index has risen by 4.93%, and the oil trading index has risen by 2.66%. Last week, international crude oil prices fluctuated at a relatively strong level. As of January 2, 2026, the settlement price of the main WTI crude oil futures contract on the New York Mercantile Exchange was $57.32 per barrel, up 1.02% from December 26, 2025 ； The settlement price of the main Brent crude oil futures contract on the Intercontinental Exchange was $60.75 per barrel, up 0.18% from December 26, 2025. In the spot market, the top five petrochemical products with the highest price increases were industrial-grade lithium carbonate, up by 22.37%; purified terephthalic acid, up by 8.32%; p-xylene (CFR China), up by 6.97%; polyester FDY, up by 5.04%; and shale oil, up by 4.98% ； The top five petrochemical products with the largest price drops were liquid chlorine, which fell by 37.72%, liquefied natural gas, which dropped by 6.69%, pure MDI, which declined by 4.23%, sulfur, which fell by 3.96%, and vitamin D3, which dropped by 3.85%. From the perspective of the capital market, the top five listed companies in terms of price increases were Guoli Technology with a 20.18% rise, Heshun Technology with a 19.11% increase, Longgao Shares with an 18.91% increase, Shangwei New Materials with a 15.68% increase, and Cangzhou Dahuahua with a 14.56% increase ； The top five listed companies with the largest declines were Qingshuiyuan, which dropped by 12.54%, Shilong Industry with a decline of 11.51%, Ruihuatai with a drop of 10.92%, Montage High-Tech with a decline of 10.21%, and Kaisheng New Materials with a decline of 9.80%.