The polyester staple fiber (PSF) industry is entering a delicate balancing act: low inventories provide cost support, major producers are coordinating output cuts, but demand remains conspicuously absent. The self-discipline plan jointly launched by leading mills on August 15 is essentially a proactive supply-side adjustment, aiming to buy the industry some breathing room between the traditional off-season and the September peak expectations.
Production Cuts: Certainty of Supply Contraction
This round of cuts is not passive shutdowns due to equipment failures, but active market regulation by enterprises. According to industry public data, the PSF operating rate in July was 70.36%; if the self-discipline measures are effectively implemented, the rate could fall to around 67%, reducing monthly supply by about 30,000 tons. Leading enterprises in Jiangsu, Zhejiang, and Fujian have all participated, covering mainstream direct-spinning capacity, which means short-term spot supply tightening is relatively certain.
In terms of pace, the cut intensity will gradually increase in late August, with concentrated implementation and maintenance cycles in September. For buyers, this implies a shift from the previously loose spot market, and low brand inventory may exacerbate local supply tensions. However, note that cut execution is flexible: once prices rebound and processing spreads recover, some cash-strapped enterprises may ease off, so the sustainability of supply contraction needs monitoring.
Cost vs. Demand: A Tug of War
The raw material side currently shows a differentiated but firm pattern. For PTA, two core units have delayed restarts, and rainfall in East China has disrupted port loading, pushing spot basis close to 300 yuan/ton, with August social inventories likely falling to a 44-month low. MEG is also supported by Middle East tensions and maintenance, with East China port inventories dropping to a 15-year low, and spot premiums reaching as high as 540 yuan/ton in early August. Low inventories provide tangible cost support, but after September, when PTA and MEG units restart, cost support may weaken.
Demand remains weak. Terminal textile and apparel orders show limited growth, yarn mills hold high finished goods inventories, and raw material procurement is limited to essential replenishment. The Keqiao Light Textile City, a key fabric trading hub, saw gray fabric transactions shrink in August, with weavers and traders cautious, buying on a need-basis. PSF-related fabrics are moving in small, scattered orders, and upstream price increases are hard to pass downstream. This mismatch between rising costs and flat demand is the root cause of squeezed processing spreads and expanding industry losses.
September Outlook: Between Expectations and Reality
In the short term, production cuts combined with high raw material basis can clearly underpin PSF prices. From late August to early September, the market is expected to stabilize and strengthen, with processing spreads gradually recovering. However, whether the medium-term trend sustains depends on whether demand can fulfill the "Golden September" expectation. If autumn/winter fabric orders are released in September and weavers shift from essential replenishment to active stockpiling, PSF procurement could rise; conversely, if orders do not improve, supply contraction alone cannot drive a sustained rally.
The Keqiao market's transaction activity is a key window to observe demand realization. Currently, the market is still in the expectation phase, with no clear signals of order recovery. In mid-to-late September, the market will oscillate between weakening costs and demand recovery, likely maintaining a volatile upward trend, with limited chance of a one-way rally. The biggest risk is supply rebound after profit recovery—existing producers may ease cuts, and delayed capacity may be re-launched, capping price and spread recovery.