A reading of 39.8% is not alarming on its own. What is alarming is that it shed 43 percentage points overnight. Public polyester industry data tracking sampled filament producers put the average sales ratio at 39.8% on September 1, while just one trading session earlier some mills had booked volumes at 300% to 400% of normal levels. Within 24 hours, the same chain flipped from scramble to standoff — and that gap is itself a diagnosis of where pricing power sits.
What the Numbers Reveal
Break the sample apart. The day's sales ratios ranged from 10% to 150%, with the dense middle band sitting between 15% and 40%. The market did not cool uniformly; it stratified. A handful of producers kept shipping, while most faced thin inquiries.
The sales ratio is the polyester chain's most sensitive thermometer. It measures not total demand but downstream willingness to take goods at a given quote. The previous session's late surge was essentially volume-for-price trade that front-loaded short-term restocking. Once quotes were raised, resistance from weaving mills hardened and inquiries cooled — a predictable chain reaction.
For buyers, the implication is direct: near-term price support is fragile. When the sales ratio falls below 40%, inventory pressure at mills typically resurfaces within three to five trading sessions, reopening room to negotiate.
Profit Is Being Redistributed
Zoom out from a single day. Filament pricing has long been squeezed from both ends: cost pass-through from PTA and MEG upstream, and acceptance capacity among weaving and texturing downstream. When upstream costs hold firm and downstream orders stay soft, polyester plants are the ones caught in the middle.
The September 1 collapse in sales ratios shows downstream tolerance for price hikes is near its limit. Weaving mills' operating rates and order books make it impossible for them to absorb one-way cost pass-through indefinitely. If the sales ratio stays below 50%, polyester plants will likely concede margin to restore shipments rather than defend quotes.
The transmission path is clear: raw material procurement in weaving clusters such as Keqiao, Shengze and Nantong will turn cautious, with on-demand buying and small-batch quick-response gaining share while traders cut inventory. In short, pricing power is shifting — briefly — from seller back to buyer.
Practical Guidance
For Buyers - Do not chase the rally. After the sales ratio drops below 50%, quote softening typically lags three to five trading sessions; wait for a better entry window. - Build positions in tranches rather than locking volume at once, splitting procurement cycles to hedge both upside and rapid reversal. - Watch the dispersion of sales ratios across sampled producers. If the middle band keeps drifting lower, weakness is broad-based, not a quirk of individual pricing strategy.
For Exporters - Raw material volatility feeds into fabric and garment quotes with a lag. Leave room for cost retracement when taking orders, and avoid locking in at highs. - If customers are delivery-sensitive, prioritize suppliers with stable sales ratios over the lowest price, to avoid delays if a mill cuts output after conceding margin. - Track how polyester chain profit redistribution affects upstream fiber export quotes. With both currency and feedstock swinging, shorten quote validity periods.
For Mills - When sales ratios are low, structural concessions to protect operating rates and customer stickiness beat defending quotes. - Monitor downstream weaving utilization. If loom operating rates keep weakening, adjust production schedules proactively to avoid passive inventory build-up.
A 43-point single-day swing may not mark a trend reversal, but it makes one thing clear: in this chain, whoever reads downstream willingness to take goods holds the initiative on the next round of quotes.