On August 31, the average sales-to-output ratio of sampled polyester filament enterprises surged to 82.8%, a sharp increase of 48.1 percentage points from the previous trading day's closing data. Such a dramatic single-day jump is uncommon in the year's production-sales records, but what deserves more attention is not the number itself, but the underlying logic driving this surge—a concentrated push from the cost side is reshaping downstream procurement rhythms.
Background
The sales-to-output ratio is a core indicator measuring the daily transaction activity of the polyester filament market. A ratio above 100% indicates that daily sales exceeded production, partially reducing existing inventory. Disaggregated data released on August 31 show that the highest ratio among sample enterprises reached 260%, with several others reporting high levels of 200%, 150%, and 135%, while many enterprises hovered in the lower range of 40%-70%. This notable divergence indicates that the overall improvement in production-sales activity is not a synchronized recovery across the industry, but rather that some enterprises, leveraging cost advantages and pricing power, captured a larger share of orders.
From the cost side, the prices of PTA and ethylene glycol—major raw materials for polyester filament—have strengthened recently, directly pushing up polymerization costs. Facing rising costs, polyester filament producers have generally adopted a strategy of reluctant sales at low prices, that is, they are not eager to release volumes but instead support prices by controlling supply. This strategy quickly transmitted through the spot market: downstream users, worried about further increases in future procurement costs, began to make small replenishments, thus pushing the overall production-sales ratio up within a short period.
Industry Impact
The jump in production-sales data is essentially a concentrated inventory replenishment driven by cost expectations, rather than a substantive recovery in end demand. For downstream weaving enterprises, what they face is not rigid demand for raw materials due to full orders, but anxious procurement driven by expectations of future price trends. Once the cost side shows signs of easing or the price increase slows, this replenishment behavior may quickly cool down, leading to a drop in the production-sales ratio again, or even triggering destocking pressure.
From the perspective of industrial chain transmission, the upward movement of polyester filament prices will gradually pass to the grey fabric and fabric stages, but the smoothness of this transmission depends on the acceptability of terminal apparel orders. If terminal consumption fails to strengthen in tandem, the cost pressure on midstream weaving enterprises will be difficult to pass on, and profit margins may be further compressed. For foreign trade enterprises, exchange rate fluctuations and uncertainties in international shipping logistics will also combine with raw material costs, making export pricing adjustments more complex.
It is worth noting that the high volatility of production-sales data has itself become a market norm. The wide distribution from 40% to 260% among enterprises on August 31 reflects the differing strategies of enterprises of various sizes and product structures in coping with cost shocks. Large enterprises, leveraging scale procurement advantages and higher proportions of long-term contracts, can manage production and sales rhythms more calmly; while small and medium-sized enterprises rely more on the spot market, are more sensitive to price fluctuations, and are more likely to be passively adjusted during sharp rises and falls.