On the last trading day of August, China's futures market showed a stark divergence between the polyester chain and the cotton textile chain: bottle chips, PTA, and staple fiber rallied by 6.00%, 4.29%, and 4.12% respectively, while cotton yarn and cotton fell by 0.95% and 0.44%. This intra-sector divergence is not accidental; it reflects multiple forces including cost transmission, supply-demand expectations, and capital sentiment. For textile buyers and exporters, understanding the logic behind this divergence matters more than the daily price moves.
Event Background
The direct trigger was the sustained rebound in international oil prices in the latter half of the week. As the upstream source of the polyester chain, a $1 per barrel change in crude oil affects PTA and bottle chip costs by approximately 35-40 yuan per ton. Additionally, several domestic PTA plants entered planned maintenance in late August, involving about 4 million tons of capacity, tightening spot supply. The bottle chip main contract 2611 closed at 7596 points, up 6.00%, marking the largest single-day gain in recent times, with market expectations for peak-season demand also building.
The staple fiber main contract 2610 closed at 7778 points, up 4.12%, slightly less than PTA but significantly stronger than cotton yarn. Staple fiber and cotton yarn are substitutes; when cotton prices weaken, staple fiber's cost advantage attracts some downstream buyers to switch. However, this rally was more cost-pushed than demand-driven—polyester plant operating rates remained around 85%, but new orders from downstream weaving mills did not show significant growth, raising questions about sustainability.
In contrast, the cotton textile chain was notably subdued. Cotton contract 2701 closed at 17125 points, down 0.44%; cotton yarn 2611 closed at 22920 points, down 0.95%. With the new cotton harvest approaching, weather conditions in Xinjiang are favorable, and the market generally expects a bumper crop. Public industry data suggests national cotton production is forecast to grow by about 3% year-on-year in the 2026/27 season, pressuring far-month contracts. Meanwhile, cotton yarn trading is sluggish, with spinner inventories rising to around 25 days, higher than last year's level.
Industry Impact
The polyester chain's strength is a clear positive for upstream suppliers. Rising PTA and bottle chip prices have improved processing margins, turning some plants from losses to marginal profits. But for midstream staple fiber mills, the key test is whether raw material cost increases can be passed downstream. Currently, the price spread between staple fiber and cotton has widened to about 5,300 yuan per ton, historically high, which may encourage some blended fabric producers to adjust their raw material mix.
The cotton chain's weakness is putting greater hedging pressure on cotton processors and traders. Cotton yarn fell more than cotton, indicating that weak downstream demand is transmitting upstream. Textile mills are more cautious in purchasing cotton, adopting a hand-to-mouth approach rather than building large inventories. This sentiment is reflected in the futures market as near-month contracts relatively resilient and far-month contracts at deeper discounts, reflecting concerns about supply pressure after the new harvest.
From a capital perspective, the polyester rally was accompanied by rising open interest, suggesting new long money entering; the cotton decline saw decreasing open interest, indicating some short covering. This capital flow divergence may continue to reinforce the split in the short term. However, the rapid rise in the polyester chain may have priced in some good news; if oil prices correct, PTA and staple fiber could see equally sharp pullbacks.