At 8,211.50 CNY per ton, the benchmark price of polyester staple fiber (PSF) on September 8 marks a 5.05% increase from the start of the month and positions the market at a one-year high. For downstream spinners, this signals rising raw material costs; for upstream polyester producers, it represents one of the most favorable profit windows in the past year. Yet, the high level also amplifies market divergence: is this a trend reversal or a temporary spike?
Price Trajectory and Market Structure
Annual statistics reveal that over the past 12 months, PSF prices have ranged between 6,267.17 and 8,426.02 CNY/ton. The current price is merely 214.52 CNY away from the peak but 1,944.33 CNY above the trough. The yearly average stands at 7,158.07 CNY, with a median of 7,346.6 CNY—meaning the current price is about 14.7% above the average, significantly exceeding normal fluctuation bands. Notably, the daily change on September 8 was -0.13%, indicating profit-taking after consecutive gains.
This price structure highlights a classic 'high-level inertia' phase: prices near the top, but upward momentum waning and bullish-bearish battles intensifying. In response, spinning mills in Jiangsu, Zhejiang, and Fujian have begun adjusting procurement rhythms, stretching their typical weekly purchases to biweekly intervals to gauge direction.
Driving Forces and Transmission
The rally is not isolated. On the cost side, stronger international crude oil prices have lifted feedstock costs for PTA and MEG, pushing up PSF production costs. On the supply side, industry data show that maintenance at several polyester plants over the past two months tightened supply, while downstream weaving and garment enterprises restocked ahead of the Mid-Autumn and National Day holidays, creating a supply-demand mismatch.
More critically, inventory cycles have shifted. Since 2026, social inventories of PSF have been steadily depleted and are now at relatively low levels. This means that even without a demand explosion, any supply disruption could trigger rapid price increases. For buyers, low inventory environments compress negotiation leverage; for factories, inventory management has become more critical than pure price speculation.
Outlook and Strategies
In the short term, PSF prices are likely to fluctuate within a high range of 8,000-8,400 CNY/ton. If crude remains strong or downstream orders exceed expectations, a breakout above the previous high of 8,426.02 CNY is possible. Conversely, if demand disappoints or polyester plants resume operations intensively, prices may retreat to seek support near the median of 7,300 CNY.
For different chain participants, this price level dictates distinct actions. Buyers should abandon 'bottom-fishing' mindsets and adopt refined cost management. Foreign trade firms must watch the lag between RMB exchange rate fluctuations and price pass-through to overseas orders, avoiding passive contract breaches due to raw material price corrections.