Brent crude oil briefly surpassed $94 intraday on July 22, a price signal driven not by isolated events but by escalating Middle East geopolitical tensions. The dual impact of U.S.-Iran military clashes and Houthi blockade of Saudi maritime routes pushed international oil prices from around $90 to close above $91 within a week. For the upstream chemical fiber chain in textiles, every $1 rise in crude lifts the cost base of PX and PTA, activating price elasticity in polyester filament yarn.
Rigid Transmission of the Cost Chain
Crude oil price fluctuations transmit through a fixed petrochemical chain: crude → naphtha → PX → PTA → polyester → polyester filament yarn. In this round, PX became the first price node to react. According to data from July 13 to 17, PX prices jumped from 7,900 yuan/ton to 8,400 yuan/ton, a weekly increase of 6.33% and 15.86% year-on-year. PTA followed, rising from 5,898.50 yuan/ton to 5,985.91 yuan/ton, up 1.48% weekly and soaring 25.68% year-on-year. PX is the direct raw material cost for PTA, and its sharp rise compressed PTA processing margins, forcing spot and futures quotes to follow.
More notably, traffic through the Bab el-Mandeb Strait in the Red Sea dropped approximately 34% in two weeks, pushing up shipping costs and increasing arrival time uncertainty. Rising freight premiums and hidden logistics costs further inflated the delivered price of PX and PTA. This dual "visible + hidden" cost pressure makes polyester mills' raw material procurement heavier than futures quotes alone suggest. For polyester filament yarn producers, PX and PTA form the cost floor; when the floor rises, ex-factory yarn prices must follow.
Volume-Price Signals and Inventory Drawdown
Driven by cost pressures, the polyester filament yarn market saw clear volume and price increases this week. For standard semi-dull yarn, POY and FDY prices rose 200–250 yuan/ton week-on-week, while DTY rose 100–150 yuan/ton. In the Jiangsu-Zhejiang region, POY 150D/48F traded at 8,100–8,180 yuan/ton, FDY 150D/96F at 8,300–8,380 yuan/ton, and DTY 150D at 9,220–9,300 yuan/ton.
Inventory data confirmed the drawdown. Industry data showed POY, FDY, and DTY inventories fell to 17.1, 22.8, and 30.4 days respectively, down 0.6, 0.4, and 3.1 days from last week. POY inventories hit their lowest since late March this year. Overall industry operating rate stood at 75.1%, up 1.4 percentage points week-on-week but still low historically. On Monday and Tuesday, yarn sales volumes surged, with some mills experiencing queueing for shipment, indicating downstream speculative restocking amid rising cost expectations.
Downstream texturizing and weaving mill operating rates recovered to 75% and 65%, up 1–2 percentage points from early July. The POY-PTA spread stayed above 1,500 yuan/ton in July, significantly improving polyester mills' cash flow profits compared to before the March geopolitical conflict. While these data superficially signal demand recovery, deeper analysis reveals that the price rise is driven by cost push and temporary restocking sentiment, not a fundamental improvement in end-user orders.
The True Face of End Demand
The current period remains the traditional off-season for textiles. Terminal grey fabric orders typically cover only 10 days of production. Comprehensive weaving mill operating rates in Jiangsu-Zhejiang are only 53%–58%, and dyeing rates are even lower at 45%–52%. Downstream fabric mills remain cautious toward high-priced raw materials, adopting a hand-to-mouth procurement strategy with zero inventory. This suggests the current yarn price rise is more about cost push and temporary restocking than a genuine recovery in demand.
Should the Middle East geopolitical premium fade, causing crude oil prices to correct, the cost support for PX and PTA would weaken, and yarn prices would face severe downward pressure. The core market contradiction is a classic tug-of-war between high cost support and weak demand. In the short term, as long as Middle East conflicts remain unresolved and crude prices stay strong, yarn prices are likely to remain firm with continued inventory drawdown. However, if Q3 peak season demand fails to materialize and downstream restocking logic collapses, yarn prices will face correction risks.