On the morning of September 10, the polyester chain futures staged a sharp surge before fading. Ethylene glycol (EG) led the rally, with its main contract touching 6,095 yuan/ton intraday, up more than 5% at one point. PTA rose over 2% to 6,270 yuan/ton, while paraxylene (PX) gained 4% to 9,412 yuan/ton. Short fiber and bottle chip also advanced by around 2%. By late morning, however, gains had narrowed across the board, with EG retreating to 5,922 yuan/ton and PX to 9,234 yuan/ton.
Cost Expectations and Capital Sentiment in Resonance
The core driver of this move was not end-use demand. According to industry public data, operating rates at weaving mills in Jiangsu and Zhejiang have not jumped, order increments in texturing and weaving remain limited, and polyester plant inventory days are still at neutral-to-high levels. What truly stirred the market was a shift in cost-side expectations—supply-side news for PX and EG released in the morning, combined with short-term capital allocation into undervalued varieties, creating a pulse-like rally.
Notably, EG's volatility was significantly larger than that of PTA and PX. The EG main contract swung from nearly 4% to over 5%, then back to 2%, with an intraday range exceeding 3 percentage points. This high elasticity suggests considerable disagreement over EG's supply-demand balance. For downstream mills, sharp EG price swings directly affect polyester chip contract settlement prices, which then transmit to filament and short fiber quotations.
Reactions and Transmission Across Industrial Belts
Feedback from major textile belts such as Keqiao and Shengze shows that after the morning futures rally, inquiry activity among some traders and mills briefly increased, but actual transactions did not rise in tandem. A polyester filament mill in Shengze said it kept quotations stable in the morning but might adjust in the afternoon if raw material prices continue to climb. This pattern of "futures moving first, spot watching" reflects lingering lack of confidence in demand.
In terms of transmission, the cost pass-through from PX to PTA to polyester chip is relatively direct, but the pass-through from chip to filament and short fiber depends on inventory pressure and order saturation at mills. Currently, polyester plant processing spreads remain near break-even, leaving little room for voluntary concessions. If raw material prices stay firm, mills will likely either cut production or raise quotations to shift pressure, which in turn further dampens already weak downstream purchasing willingness.
The performance of short fiber and bottle chip also deserves attention. The short fiber main contract rose 2% to 8,230 yuan/ton, while bottle chip expanded gains to 2% at 8,070 yuan/ton. Short fiber's downstream is mainly cotton spinning and filling materials, while bottle chip serves packaging and beverage industries. Their gains were more cost-push passive moves rather than improvements in their own supply-demand fundamentals. Once costs retreat, these two varieties may face greater correction pressure than raw materials.
Short-Term Impact on Procurement and Hedging
For textile mills, the biggest challenge from this pulse-like market is timing procurement. Chasing raw materials when futures surge can easily lead to being trapped in an afternoon pullback, while complete inaction may miss阶段性 lows. Historically, large intraday swings in the polyester chain are often accompanied by sharp basis changes, creating windows for pricing and basis trading.
Exporters need to watch both exchange rates and raw material price volatility. If raw material prices rise rapidly in the short term, some previously locked orders may face profit compression. This is especially true for export orders priced in US dollars with long delivery cycles, where raw material cost fluctuations directly erode margins.