合成橡胶：海外丁二烯供应预期下降 提振BR上涨

Raw Materials and Spot Prices - As of August 28, the market price of butadiene in Shandong is 9590 yuan/ton, an increase of 90 yuan/ton; CIF price for butadiene in China is 1095 USD/ton, unchanged; the market price for styrene-butadiene rubber (BR9000) in Shandong Qilu Petrochemical is 11950 yuan/ton, an increase of 150 yuan/ton, with a price difference of -2900 yuan/ton and a basis of -30 yuan/ton, down 120 yuan/ton [1] Production and Operating Rates - In July, China's butadiene production was 453,600 tons, up 3% month-on-month; styrene-butadiene rubber production was 129,200 tons, up 5.5% month-on-month; semi-steel tire production was 56.97 million units, down 1.1% month-on-month but up 7.8% year-on-year; full-steel tire production was 12.75 million units, up 1% month-on-month and up 5.1% year-on-year [2] - As of August 28, the operating rate for the butadiene industry is 67.9%, down 0.4% month-on-month; the operating rate for high-styrene butadiene rubber is 75.8%, up 9.7% month-on-month; the operating rate for semi-steel tire manufacturers is 71%, down 1.3% month-on-month; the operating rate for full-steel tire manufacturers is 65%, down 0.1% month-on-month [2] Inventory Levels - As of August 27, butadiene port inventory is 24,000 tons, down 3,300 tons; styrene-butadiene rubber factory inventory is 25,100 tons, up 1,900 tons, an increase of 8.2% month-on-month; trader inventory is 6,620 tons, down 790 tons, a decrease of 10.7% month-on-month [3] - During the period from August 21 to August 27, domestic butadiene sample total inventory decreased by approximately 5.69% week-on-week, with sample enterprise inventory slightly down 0.16% week-on-week; port inventory decreased by 12.09% week-on-week due to limited ship arrivals and normal consumption of downstream raw material inventory [4] Market Analysis - On August 28, it was reported that the supply of butadiene from Singapore and India is expected to decline, boosting BR prices, with the main synthetic rubber contract BR2510 closing at 11,980 yuan/ton, an increase of 1.01% compared to the previous day's settlement price; there are no significant expectations for an increase in domestic butadiene production in the near term, while the main downstream industries maintain decent operating rates [5] - The supply side indicates that after multiple styrene-butadiene rubber facilities resume operations, production will continue to grow, but overall inventory reduction will be limited; on the demand side, semi-steel tire inventory remains high, increasing pressure on both domestic and export sales, making it difficult to raise operating rates for semi-steel tires, while full-steel tire operating rates remain stable overall [5]