苯乙烯期价创5年来新低！持续下跌的原因是？

Core Viewpoint - The significant decline in styrene futures prices since late September is attributed to multiple factors, including a sharp drop in oil prices and weak fundamentals in the styrene market [1][2]. Group 1: Price Decline Factors - Styrene futures prices began to decline from a high of 7831 yuan/ton in late June 2025, reaching a low of 6437 yuan/ton by October 16 [1]. - The drop in oil prices is a major factor affecting styrene prices, driven by geopolitical risks, trade tensions, and an oversupply situation as the demand season ends [1][2]. - The overall chemical product prices have also fallen due to macroeconomic disturbances and OPEC+ production increases, impacting styrene prices [1]. Group 2: Supply and Inventory Dynamics - Styrene's weak fundamentals are reflected in rising port inventories and a marginal weakening in the upstream pure benzene supply-demand balance [2]. - As of mid-October, styrene inventories at East China ports were around 200,000 tons, significantly higher than the approximately 40,000 tons from the same period last year, marking a five-year high [2]. - Despite maintenance activities reducing production slightly, the overall supply remains high, and demand has also decreased, leading to a continued oversupply situation [2][3]. Group 3: Industry Chain Analysis - The basic fundamentals of pure benzene, the direct raw material for styrene, are also weak, with expectations of declining demand due to losses in downstream products [3]. - High hidden inventories of pure benzene, concentrated in styrene plants, are expected to keep production rates high, as plants are unlikely to significantly reduce output to maintain market share [3]. - The entire industry chain, including pure benzene, styrene, and downstream synthetic materials, is experiencing historically high inventory levels, which will take time to alleviate [3]. Group 4: Market Outlook - Short-term reversal of styrene prices is considered difficult, with potential for a temporary rebound due to supply constraints from geopolitical factors [4]. - For a price reversal to occur, improvements in oil prices, upstream pure benzene fundamentals, and downstream orders are necessary [5]. - The likelihood of a decrease in styrene inventory and low valuation suggests that overly bearish views may not be warranted, although new production capacity and oil price declines pose challenges [5].