When the ethylene glycol futures main contract hit 6,046 yuan per ton on September 9, market participants realized this was more than a numerical jump—it signaled a reassessment of cost logic in the polyester value chain. The last time prices were this high was October 2021, when global supply chains were still struggling in the post-pandemic chaos. Now, geopolitics has again become the dominant price variable. A single-day gain of about 4% pushed ethylene glycol into a near five-year high range, and whether this level can hold depends on how far the two main drivers—cost push and supply contraction—can go.
Cost Side: Oil Prices Are the Most Sensitive Nerve
The most direct driver of this rally is the sharp rise in international oil prices. Escalating geopolitical tensions—U.S. attacks on Iranian vessels and Iran's retaliatory strikes—have injected a risk premium into the crude market. As a downstream petrochemical product, ethylene glycol production costs are highly correlated with naphtha and crude oil prices. When oil prices jump, ethylene glycol futures react almost in sync, reflecting the market's heavy weighting on cost-side pricing. Notably, this cost transmission is not linear but amplified through expectations: traders anticipate future shortages and lock in prices early, while plants are forced to accept high prices due to low inventories. For polyester plants, this means the window for raw material procurement is narrowing, and any delay may incur a higher premium.
Supply Side: Chain Reaction from Import Route Disruption
While oil price increases represent universal cost pressure, the impact of Middle East conflict on ethylene glycol imports is more targeted. Iran sits at the chokepoint of the Strait of Hormuz, which carries about one-third of global LNG and a significant share of petrochemical shipments. Since the conflict began, ethylene glycol import routes have been disrupted, leading to a notable decline in import volumes. China is the world's largest importer of ethylene glycol, with the Middle East—especially Saudi Arabia and Iran—being major suppliers. Reduced imports have accelerated destocking at domestic ports, creating a temporary supply squeeze in the spot market. This supply contraction does not appear immediately but gradually manifests through delayed shipments and lower arrivals. Industry public data indicates that ethylene glycol port inventories have fallen for several consecutive weeks, providing fundamental support for futures prices.
Industry Transmission: Cost Relay from Raw Material to Fabric
Ethylene glycol is a core raw material in the polyester chain, so its price increase inevitably transmits downstream. Production costs for polyester filament, staple fiber, and bottle chips rise accordingly, but whether end-fabric prices can follow depends on downstream demand absorption. The textile industry is currently in the pre-season stocking period before the traditional peak season. If raw material costs remain high, weaving mills face a dilemma: either accept high-priced raw materials and try to pass costs into fabric prices, or reduce operating rates to minimize losses. Historically, sharp raw material price increases often lead to downstream buyers adopting a wait-and-see attitude, which suppresses demand release. Therefore, this rally's impact on the industry chain is not unilaterally positive but intensifies profit redistribution games between upstream and downstream. For fabric buyers, this means frequent price adjustments in the near term and higher risks in long-term fixed-price contracts.
Trend Outlook: High-Level Fluctuation More Likely Than a One-Way Surge
Considering both cost and supply-demand factors, ethylene glycol prices are more likely to exhibit high-level volatility than a sustained one-way surge. On one hand, geopolitical uncertainty remains; any new military action could again push oil prices up, supporting ethylene glycol. On the other hand, high prices will stimulate supply from non-Middle East regions, such as increased operating rates at U.S. and Southeast Asian plants, while also curbing some downstream demand. Additionally, the pace of domestic new capacity release is a key variable. If domestic production can fill the gap in time, the impact of import contraction will be partially offset. Therefore, rather than chasing short-term highs, industry participants should focus on the upper and lower bounds of the price fluctuation range and formulate more robust procurement and inventory strategies.