Brent crude touching $101.25 per barrel is both a lifeline and a leash for monoethylene glycol (MEG). The lifeline comes from rigid cost escalation; the leash comes from polyester downstream's natural resistance to expensive feedstock. China Customs data and industry figures paint a striking picture: port inventory has collapsed from a first-half peak of 975,000 tonnes to just 86,000 tonnes. A drawdown of that magnitude is rare in MEG's history, and it has given spot prices a firm near-term floor.
Two Opposing Forces on the Supply Side
The inventory plunge was driven not by a demand surge but by import contraction. The Middle East is a core MEG production region, and the Strait of Hormuz carries a large share of chemical outbound shipments. Persistent geopolitical tension has heightened concerns over shipping disruptions and schedule delays, directly suppressing Middle Eastern cargo departures. The industry broadly expects import volumes to stay low through Q4, and the weak port inventory pattern is unlikely to reverse in the short term.
But the import gap is being partially offset by rising domestic output. National MEG operating rates currently stand at 65.92%, with coal-based and oil-based units running smoothly. Coal-based units, buoyed by healthy production margins, have reached around 71% utilization. More importantly, two large plants—Zhongsha Gulei and Huajin Aramco—are scheduled to come online in Q4, giving domestic supply considerable incremental elasticity. Once domestic cargoes are released in volume, they will exert clear downward pressure on prices.
The supply-side game is essentially a race between "import contraction and domestic expansion." For factories, this means the procurement window may be shorter than expected—once new plants start smoothly, the tight spot situation could ease rapidly.
Demand Is the Real Ceiling
Downstream polyester is the core constraint preventing MEG from sustaining a major rally. Q4 marks the transition window between polyester's peak and off seasons. The traditional "Golden September and Silver October" peak is gradually winding down, and terminal textile order momentum is insufficient. Facing relatively high MEG feedstock costs, polyester plants are under mounting cost pressure. Downstream resistance to expensive feedstock is strong, with procurement largely limited to hand-to-mouth buying on a just-in-time basis. Willingness to build large proactive inventories is weak.
Weaving segment orders are soft, and finished goods inventory destocking pressure is significant. Upstream transmission of feedstock price increases faces heavy resistance throughout the chain. More critically, tight PX supply in Q4 is forcing many polyester enterprises to cut production. Once polyester operating rates decline, MEG feedstock consumption drops directly. Even if MEG supply contracts temporarily, without a substantive recovery in terminal textile consumption, polyester enterprises cannot sustain high feedstock costs for long and may further reduce output or conduct maintenance—dragging down MEG demand.
This creates a negative feedback loop: feedstock price rises → polyester cost pressure → passive production cuts → MEG demand contraction → price loses upward momentum. The only key to breaking this chain is a substantive improvement in terminal orders, not short-term supply disruptions.
Two Variables to Watch
In summary, rising oil prices, geopolitical disruption, and low port inventory provide short-term support for MEG, giving prices a foundation for range-bound strength. But supply-side positives alone are unlikely to drive a sustained one-way rally.
Future price heights depend on two key variables: first, supply changes from Middle East shipping developments and domestic new plant commissioning progress; second, whether textile terminal orders can improve and whether the polyester industry can maintain stable operations. If downstream demand fails to materialize, negative feedback pressure across the chain will emerge, and MEG's upside will be significantly compressed.
For industrial clusters, order rhythms in fabric hubs like Keqiao and Shengze will directly determine polyester operating stability. Exporters should pay particular attention: if polyester production cuts expand, supply contraction in polyester filament and staple fiber could push up fabric costs and affect export quotation competitiveness.