On July 27, Jiangsu polyester staple fiber (PSF) spot prices dropped 170 yuan/ton to 7,500 yuan/ton, with low-end deals hitting 7,350 yuan/ton. This is not an isolated raw material fluctuation but a superposition of international geopolitical signals and domestic polyester supply-demand imbalance.
Cost Side: Oil Price Collapse Breaks Support
The direct trigger is upstream cost collapse. After the US-Iran truce, international crude oil futures fell rapidly, dragging down valuations of PX and PTA. PSF, a direct downstream of PTA, has a short cost transmission chain — each $1 move in oil corresponds to roughly 50-80 yuan/ton in PSF costs. The 170-yuan drop largely reflects cumulative crude oil declines in recent days, representing a quick market clearance of cost-side changes.
Jiangsu, a major PSF production base, serves as a price barometer. Current spot trading ranges from 7,450 to 7,600 yuan/ton, with low-end prices approaching the cash cost line for some small and medium plants. If oil remains low, more factories may opt for production cuts or maintenance shutdowns to support prices.
Demand Side: Off-Season and Bearish Sentiment Stalls Procurement
It is the traditional off-season for textiles, with downstream yarn mills and weaving plants operating at low rates. PSF, a key raw material for blended cotton yarns, should normally stimulate restocking when prices fall. However, bearish sentiment dominates, and buyers are delaying purchases, preferring to consume existing inventories. This negative feedback loop may worsen PSF plant inventory pressure. Industry data shows that Jiangsu-Zhejiang PSF plant inventory days have risen from 10 to 13-14 days in July. If the price cut fails to boost sales, inventories will continue to build, leaving room for further downside.
Industry Impact: Yarn Mills See Temporary Margin Relief, but Risks Deferred
For downstream yarn mills, lower raw material costs are a short-term benefit — using current PSF prices could expand theoretical profit margins by 150-200 yuan/ton for cotton-type yarn. However, yarn prices themselves are also weakening, and end-order volumes remain low. If mills cannot pass on cost savings to fabric mills and apparel brands, the profit improvement remains notional.
More critically, industrial clusters in Nantong and Shengze — areas heavily reliant on cotton-polyester blends and home textile fabrics — are highly sensitive to PSF price swings. Sharp raw material volatility will directly reflect in grey fabric quotations, prolonging negotiation cycles for export orders and intensifying price battles between buyers and suppliers.