Geopolitical Risks and Tight Supply Drive Polyester Filament Yarn Prices Up Over 3% Weekly

Ripples from Middle Eastern geopolitical conflicts are driving weekly gains of over 3% in China's polyester filament yarn (PFY) market. In the third week of July 2026, the weekly average price of POY 150D/48F in the Jiangsu-Zhejiang region reached 8,350 yuan per ton, up 3.41% from the previous period. FDY and DTY mainstream specifications also recorded gains of 2.83% and 2.19%, respectively. This rally is not driven by a sudden surge in demand but by a dual squeeze from costs and supply.

Dual Drivers: Cost and Supply

The direct catalyst for this round of price increases is the persistent rise in international crude oil prices. US airstrikes on Iran and Houthi claims of a maritime blockade on Saudi Arabia have reintroduced geopolitical risk premiums into the energy market. For the PFY industry, which uses PTA and MEG as direct raw materials, cost transmission is almost immediate. Industry data shows that POY profits rebounded to 366.31 yuan per ton this week, a sharp increase of 118.41 yuan per ton or 47.77% from the previous week, indicating that cost increases have been effectively passed downstream.

At the same time, the supply side has not been a drag. Domestic melt-direct spinning PFY weekly output remained stable at 645,300 tons, with capacity utilization at 74.39%, both flat from last week. More critically, changes in inventory structure are at play: after several weeks of decent sales-to-output ratios, factory finished goods inventory pressure has continued to ease. Some popular specifications that were in tight supply due to earlier production cuts by leading enterprises have become the vanguard of this price hike.

Downstream Acceptance and Potential Risks

However, the transmission along the industrial chain is not frictionless. This week, weaving capacity utilization stood at 51.68%, down 0.63 percentage points from the previous week. This data implies that while raw material prices are rising, end-user weaving mills' willingness to operate is marginally weakening. The average sales-to-output ratio fell to 56%, down 6 percentage points from the previous week, also reflecting that downstream players are becoming cautious in restocking after the rapid price surge.

For buyers, the current scenario is a classic 'price-up to destock'. Factory quotations are firm, but whether end-user orders can support higher prices remains uncertain. The evolution of the geopolitical situation is the biggest variable—if tensions ease and oil prices fall, PFY prices could quickly lose cost support; if tensions persist, the cost-push logic will continue to dominate the market.

Short-term Outlook: Cautiously Bullish with Risk of Correction

Looking ahead, the PFY market is expected to maintain a narrow and slightly firm trend next week. Geopolitical tensions are unlikely to ease significantly in the short term, providing clear cost support. With low factory inventory pressure and tight supply for some specifications, the fundamental backdrop remains supportive. However, the continued decline in weaving operating rates warrants attention, as it may signal weakening demand absorption capacity. If price hikes further dampen downstream purchasing willingness, sales-to-output ratios could decline further, and factories may face the risk of inventory accumulation rather than upward pricing power.

Practical Recommendations

For Buyers - In this cost-driven uptrend, purchase on a need basis and avoid heavy stockpiling at high prices. Monitor Middle East developments as a reference for procurement timing. - For tight-supply specifications like POY, consider shortening procurement cycles and locking in short-term orders; for lagging varieties like FDY and DTY, watch price spreads and negotiate when opportunities arise.

For Mills - Use the current profit window to prioritize inventory digestion and control the pace of price increases to avoid triggering downstream resistance. - Closely monitor weaving operating rate data. If it declines by more than one percentage point for two consecutive weeks, reassess sales and production strategies to prevent passive inventory buildup.