On August 31, the average sales-to-output ratio of polyester filament sample enterprises stood at 82.8%, a sharp rise of 48.1 percentage points from the previous trading day. This is not an ordinary market fluctuation but a signal of concentrated release of cost expectations, inventory games, and downstream psychology within a single day. A nearly 50-point jump in one day is rare in the chemical fiber industry in recent years, indicating that upstream and downstream are recalibrating price anchors.
Behind the Data: The Logic of the Sales Ratio Jump
The direct trigger for the ratio jumping from around 34.7% to 82.8% was cost-side support. Rising raw material prices strengthened filament producers' reluctance to sell at low prices, quickly reducing low-cost supply. Meanwhile, downstream users, worried about higher future procurement costs, made small replenishments to avoid being left behind by cost increases before the peak season. The day's data showed clear divergence among sample enterprises: the highest reached 260%, the lowest only 40%, with a median around 70%—indicating that not all enterprises enjoyed the rebound, and the gap in order-taking capability between leading and small-to-medium producers widened further.
This divergence reflects a redistribution of bargaining power in the industry chain. Large filament producers, leveraging economies of scale, find it easier to pass on cost increases, while smaller players face dual pressure from raw material procurement and finished product sales. The jump in the sales ratio is not a signal of comprehensive demand recovery but rather a short-term pulse driven by cost expectations, whose sustainability depends on whether raw material prices can hold and terminal orders can follow up.
Industrial Impact: Cost Transmission and Inventory Games
The abnormal movement in filament sales ratio is essentially a microcosm of cost pressure transmitting downstream. When raw material prices rise, producers rationally reduce low-price shipments and wait for better prices, which tightens market supply in the short term and increases downstream urgency. However, downstream users' 'small replenishment' strategy also reveals caution: they are unwilling to build large inventories at current prices, instead trying to lock in some demand before further cost increases. This game results in higher market activity, but the sustainability of actual orders remains to be seen.
From an inventory cycle perspective, the rebound helps alleviate inventory pressure for sample enterprises, but inventory levels vary significantly. Enterprises with ratios above 100% (e.g., 260%, 200%) may have entered a destocking phase, while those below 50% (e.g., 40%) still face inventory accumulation risks. This divergence will affect subsequent pricing strategies—enterprises with smooth destocking may be more confident in raising prices, while those with high inventory may be forced to offer discounts, widening market price gaps.
For downstream weaving enterprises, cost management is now more critical than ever. Polyester filament is a major raw material for grey fabric production, and its price fluctuations directly affect fabric costs. If raw material prices continue to rise, weavers' profit margins will be squeezed, especially when terminal apparel orders have not yet clearly recovered, limiting their ability to pass on costs. Therefore, the jump in the sales ratio is more of a warning: cost volatility is intensifying, and every link in the chain needs to reassess inventory strategies and order pacing.