Night trading on July 28 sent mixed signals: polyester staple fiber (PSF) futures edged up 0.11% to 7,262 yuan/ton, and bottle-grade chips gained 0.31% to 7,124 points. In contrast, cotton fell 0.22% to 15,830 yuan/ton, cotton yarn dropped 0.20% to 22,270 yuan/ton, and PTA declined 0.11% to 5,634 yuan/ton. While the moves were narrow, the directional divergence between chemical fiber and cotton products reveals fundamentally different market dynamics.
Chemical Fiber Side: Why PSF and Chips Bucked the Trend
The small gains in PSF and bottle-grade chips were not accidental. The polyester chain shows a pattern of "strong upstream, stable downstream." Although PTA weakened due to volatile crude oil and ample PX supply, polyester producers successfully maintained prices through production cuts. Industry data shows that PSF plant operating rates in Jiangsu and Zhejiang have dropped about 3 percentage points from the June peak, indicating clear output discipline.
Meanwhile, downstream weaving and texturing mills, after destocking raw materials in late June, initiated a round of essential restocking in late July. This short-term game of "mills controlling supply, buyers replenishing" provided floor support for PSF prices. For bottle-grade chips, seasonal export recovery and lingering domestic beverage demand continued to provide positive momentum.
However, caution is warranted. If PTA and PX prices continue to weaken, they will gradually erode the polyester chain's price support. A systemic decline in crude oil could quickly erase PSF's current small premium.
Cotton Side: Squeezed Between Production Expectations and Weak Demand
The simultaneous decline in cotton and cotton yarn directly reflects fundamental pressures. On the supply side, the Northern Hemisphere's new cotton crop is entering a critical growth period. The USDA's July report maintained a global production estimate up nearly 5% year-on-year, with favorable weather in China's Xinjiang region reinforcing the expectation of a bumper harvest. This keeps ICE cotton under pressure near 70 cents/lb, which transmits to Zhengzhou Cotton.
The demand picture is even more challenging. Although cotton yarn prices fell less than cotton, downstream fabric mills report mainly small, urgent orders, with large orders scarce. Inventory destocking at spinning mills in major cotton textile belts like Shandong and Henan has been notably slower than in previous years. Some mills have begun reducing operating rates to ease financial strain. Cotton yarn futures have fallen nearly 3% from the June high, and the spot discount to futures persists, indicating weak confidence among traders and end-users.
Two Chains, Two Inventory Strategies
The night trading divergence essentially reflects two different inventory cycles. The chemical fiber chain (PSF, bottle-grade chips) is transitioning from "active destocking" to "passive destocking," with controlled supply and periodic downstream restocking providing price support. The cotton textile chain remains in the early stages of "passive destocking" after a period of "active inventory building," characterized by ample supply and weak demand, with downward price pressure still present.
For buyers, this necessitates completely different approaches: PSF can be moderately locked in for Q3 deliveries at current levels, but chasing highs is not advisable. For cotton, a low-inventory strategy should be maintained, waiting for a clear bottom signal after the new crop pressure is released.