Polyester Filament Yarn Sales-to-Production Ratio Surges to 103.6% in a Single Day: Short-Term Resonance of Cost Pass-Through and Downstream Restocking

On July 8, the Chinese chemical fiber industry witnessed a notable signal: the average sales-to-production ratio of polyester filament yarn sample enterprises surged to 103.6%, a significant increase of 60.7 percentage points from the previous trading day's closing data. This figure indicates that factory shipments exceeded production on that day, leading to a net reduction in inventory.

Cost Side: The Linked Rally of Crude Oil and Polyester Raw Materials

The direct catalyst for the surge in the sales-to-production ratio was the simultaneous rise in upstream crude oil and polyester raw material prices. International oil prices strengthened between July 7 and 8, driving up prices for core polyester raw materials such as PX and PTA. For downstream weaving mills, the expectation of rising raw material costs triggers a 'buy on rising prices, avoid on falling' purchasing psychology—locking in relatively low-cost supplies early to hedge against subsequent cost pressures became the core motivation for increasing procurement volumes.

This cost transmission effect is particularly pronounced in the chemical fiber industry chain. Polyester raw material costs account for over 85% of the production cost of polyester filament yarn, meaning any fluctuation in raw material prices quickly transmits to the yarn segment. The surge in the sales-to-production ratio essentially represents a concentrated release of upstream cost increase expectations at the midstream processing stage.

Demand Side: Structural Divergence Behind the Data

While the average sales-to-production ratio of 103.6% appears robust, the data from individual sample enterprises shows extreme divergence: the highest reached 300%, while the lowest was only 10%. This stark disparity indicates that the market is not experiencing a broad-based recovery but rather a clearly structural phenomenon.

Enterprises with sales-to-production ratios exceeding 100% were mainly concentrated in conventional specifications of polyester POY and DTY, which are primary raw materials for downstream water-jet looms and warp knitting machines. In contrast, enterprises with ratios below 50% were often those with differentiated product mixes or suboptimal inventory structures. In other words, this restocking event exhibits clear product and enterprise selectivity, rather than being an industry-wide demand recovery.

From an end-demand perspective, the current period falls within the traditional off-season for textiles, with no significant increase in apparel fabric orders. Therefore, the procurement pulse on July 8 is more likely to be a 'speculative restocking' based on cost expectations, rather than substantive demand growth driven by final consumption.

Inventory Cycle: A Short-Term Disturbance in the Destocking Process

Looking back at the period from late June to early July, the polyester filament yarn industry was generally in a phase of inventory accumulation. Sample enterprises' inventory levels once climbed to 20-25 days, with some even facing pressure from excess stock. The surge in the sales-to-production ratio plays a positive role in alleviating inventory pressure, but its sustainability remains questionable.

A key observation point is this: if crude oil and polyester raw material prices retreat in subsequent trading days, downstream purchasing enthusiasm could quickly cool. Historically, there have been multiple instances of 'one-day pulse' patterns—where the sales-to-production ratio spikes sharply for a single day before rapidly declining, slowing the pace of inventory reduction. Therefore, the July 8 data should be viewed more as a short-term disturbance within the inventory cycle rather than a trend reversal.

Market Outlook: Short-Term Game vs. Medium-to-Long-Term Pressure

For polyester filament yarn manufacturers, this surge in the sales-to-production ratio offers a rare window to destock. Companies should seize this opportunity to accelerate shipments, rather than blindly raising prices or increasing production. If raw material prices remain strong, the sales-to-production ratio is likely to stay within the 80%-100% range over the next 1-2 weeks, but it will be difficult to sustain overselling levels above 100%.

In the medium to long term, the chemical fiber industry still faces dual pressures of overcapacity and weak end demand. In 2026, new polyester filament yarn capacity is expected to exceed 2 million tons, while downstream weaving operating rates have slipped from 75% at the beginning of the year to around 60% currently. The supply-demand imbalance remains unchanged by a single day's surge in the sales-to-production ratio.

For Buyers - Current raw material prices are at a cyclical low; consider moderately increasing stock levels for conventional varieties, but keep inventory cycles within 15 days to avoid losses from price corrections. - Closely monitor crude oil and PTA futures trends. If international oil prices fall for two consecutive days or more, halt large-scale procurement and adopt a wait-and-see approach.

For Chemical Fiber Mills - Use this window of rising sales-to-production ratios to prioritize clearing slow-moving inventory items, especially differentiated products like fine denier yarns and colored yarns. - Avoid rushing to raise prices when inventory declines rapidly; maintain price stability to solidify customer orders and prevent downstream shifts to other suppliers due to price volatility.