On September 1, the polyester filament market posted a telling statistic: the average sales-to-output ratio of sampled enterprises stood at only 39.8%, down 43.0 percentage points from the previous trading day's close. Such a sharp single-day swing is rare in recent months. What makes it more intriguing is that this decline came right after late-session buying on the prior day, when some producers saw ratios soar to 300%-400%.
The Logic Behind the Numbers
The plunge in the ratio does not mean demand vanished overnight. Instead, it reflects a sudden shift in market rhythm. The late-session surge yesterday was likely a preemptive response by downstream users to anticipated price hikes, pulling forward demand. Today, as most producers raised quotations, buyers resisted, inquiry sentiment cooled, and the ratio naturally tumbled.
Disaggregated data show today's ratios ranging from 10% to 150%, with most firms falling between 20% and 40%, and only a few above 80%. This divergence indicates that companies with stable long-term customers or differentiated products are better positioned to weather sudden turns.
Price Game and Inventory Cycle
The market is currently trapped in a cycle of price hikes, resistance, and wait-and-see. Upstream raw material costs remain high, prompting producers to try passing on pressure downstream. Yet weaving mills, facing only moderate recovery in end orders, are reluctant to fully accept increases. At its core, this tug-of-war stems from a mismatch in inventory cycle expectations along the chain.
For producers, yesterday's volume gave a chance to test price increases, but today's drop signals limited downstream tolerance. If prices keep rising without a rebound in the ratio, inventory pressure will build, possibly forcing promotional discounts later. Conversely, if buyers accept new levels after a brief pause, the price floor may shift upward.
Transmission to Downstream and Trading
Short-term volatility in the ratio creates both risks and opportunities for buyers and traders. Locking in prices early can hedge against cost inflation, but mistiming could lead to inventory markdowns. Sentiment is fragile, and any news may trigger sharp swings.
Over a longer horizon, the supply-demand landscape remains unchanged. Polyester filament capacity is expanding steadily, end demand from apparel and home textiles is growing moderately, and export data show no major shifts. Thus, this anomaly likely reflects a short-term mismatch between inventory cycles and sentiment, not a trend reversal.