BZ：预期改善EB：行情平淡

Report Industry Investment Rating - The overall investment rating is neutral [4] Core Viewpoints - For pure benzene, last week's supply increased with a new Jingbo plant producing products and no new device maintenance. August's supply is expected to continue rising. Imports are expected to decline in August as the US - Asia arbitrage window closed and the China - South Korea price difference is weak. In the short - term, demand may rise or remain stable due to the commissioning of Jingbo's styrene plant and high operating rates of caprolactam and aniline. In the long - run, demand may weaken due to weak downstream profits. Inventory is expected to decrease, and the current valuation is low [4]. - For styrene, last week's supply decreased. There were no new maintenance devices, but overall supply was high in August and may tighten in September due to multiple device overhauls. Downstream "Three S" comprehensive operating rates are weak, and demand is poor with high inventory. However, current downstream comprehensive profits are good, and short - term operating rates are expected to remain stable. Inventory is expected to continue increasing, and the valuation is neutral [4]. Summary by Relevant Catalogs Pure Benzene Supply - There are no new device overhauls, and the current operating rate is at a high level, so supply is expected to continue increasing. The restart of some devices and the commissioning of new ones are expected to increase August's output by 70,000 tons month - on - month, still facing great supply pressure [5][16]. Demand - Downstream overall operating rates are high. With the commissioning of the new downstream styrene plant, overall demand is expected to be good [5]. Inventory - Last week, the East China port inventory was 152,000 tons, a month - on - month decrease of 10,000 tons. Overall, pure benzene supply and demand are both increasing, and subsequent inventory is expected to decrease [45]. Valuation - The BZN spread is weak, and the overall valuation of pure benzene is not high [45]. Month - to - Month Spread - Pure benzene is expected to see inventory reduction, and the paper - goods month - to - month spread structure has shifted to the B structure, with the spread likely to strengthen later [5]. Styrene Supply - New device commissioning is expected to increase August's supply, but it may contract in September due to more overhauls. Last week, the operating rate decreased, and overall supply declined. With the commissioning of Jingbo and the restart of overhauled devices, August's supply is expected to increase by about 48,000 tons month - on - month [5][61]. Demand - Downstream "Three S" operating rates remain stable but are weak. Overall downstream profits are good, and demand is expected to remain stable. Currently, the "Three S" are in the off - season, with certain demand resilience, but high inventory may lead to weaker demand later [5][94]. Inventory - Last week, the East China port inventory decreased to 150,500 tons, the South China port inventory increased to 14,500 tons, and the overall port inventory decreased to 165,000 tons. Overall, styrene inventory is expected to increase later [91][94]. Valuation - The BZ - SM spread has decreased significantly, and the styrene valuation is neutral [4]. Month - to - Month Spread - The pattern of strong supply and weak demand combined with improved long - term expectations is expected to maintain the C structure [5]. External Market Support - The US - Asia arbitrage window has been continuously closed. In the first 10 days of August, 38,725 tons of pure benzene were imported from South Korea, a significant month - on - month decrease compared to July and a year - on - year low [5]. Regional Market Conditions Pure Benzene - In North America, there is a large amount of pure benzene inventory due to advance stocking in anticipation of tariffs and poor downstream demand. In Western Europe, traditional downstream demand is sluggish, and pure benzene profits have deteriorated, with Brazilian pure benzene possibly being resold to Europe. In Asia, the US - Asia arbitrage window is closed, and China's pure benzene demand remains stable [50]. Styrene - In North America, the spot market is weak, sellers are reluctant to sell due to low profits, and tariffs have weakened styrene's export competitiveness. In Western Europe, supply is relatively stable, but demand is weak. In Asia, China's downstream demand is stable, while demand outside China remains weak, and styrene production is in the red. Southeast Asian overhauls in August may tighten supply. The US - Europe arbitrage window is open, and the US - Asia arbitrage window is closed [110].