When the cost of polyester's raw material is pushed up by oil, cotton's price competitiveness rises passively. That is the most direct transmission chain behind the current rebound in international cotton prices. On September 9, the most-active December ICE cotton contract settled at 87.28 cents per pound, up 0.96 cents, or 1.11%, after touching 85.56 cents in the prior session, its lowest since August 19. A single-session swing from a three-week low to a gain of more than 1% shows that the market's pricing focus is not on demand, but on costs and currency.
Cost Substitution: How Oil Puts a Floor Under Cotton
Brent crude futures broke above $100 a barrel, settling at their highest since late May. Escalating attacks on oil tankers in the Middle East quickly fed supply-disruption concerns into prices. For textiles, the significance is not crude itself but its downstream effect: polyester fiber production costs move higher.
Cotton and polyester substitute for each other across yarn, home-textile filling and nonwovens. When polyester quotes rise on feedstock costs, downstream mills tilt their fiber blends toward natural fiber. This substitution is not instantaneous; it usually takes two to four weeks to pass through quotes, but it forms the practical basis for cotton finding support near 85 cents.
At the same time, the dollar index hovered near a two-week low. Dollar-priced commodities became cheaper for overseas buyers, offering a marginal boost to purchasing interest in Turkey, Vietnam and Bangladesh. The combination of cost substitution and currency relief is what distinguishes this rebound from a purely technical correction.
Supply and Demand: Falling Crop Ratings Versus a Record Brazilian Crop
Support does not come from costs alone. USDA's weekly crop progress report showed the US cotton good-to-excellent rating at 34% as of September 6, down from 39% a week earlier and 54% a year ago. Consecutive declines mean quality and yield expectations for the Northern Hemisphere crop are being revised lower.
Supply is not uniformly bullish, however. Consultancy Agroconsult raised its 2025/26 Brazilian cotton (lint) output forecast to a record 4.5 million tonnes, about 300,000 tonnes above its previous estimate, citing higher yields found in field surveys. A bumper Southern Hemisphere crop offsets Northern Hemisphere quality concerns, which is why prices remain range-bound after the rebound rather than breaking into a trend.
Inventories offer little directional signal either. ICE data showed deliverable No. 2 cotton stocks at 54,414 bales as of September 8, unchanged from the prior session. Stable stocks mean limited near-term delivery pressure, but also no squeeze or drawdown to drive a one-way move.
The physical market firmed in tandem. The Cotlook A index stood at 96.10 cents per pound on September 9, up 10 points. Futures and spot rising together reflects improved cost expectations, not a surge in end-user orders.
Industry Impact: Recalibrating the Buying Window and Quote Rhythm
For China's textile chain, the transmission of this overseas rebound must be viewed in layers. Upstream traders and ginners will adjust basis quotes first, lifting the landed cost of imported cotton with the ICE board. Midstream spinners face a scissors gap between blending costs and order prices; if downstream buyers refuse to accept higher prices, margins compress.
The timing matters more. USDA's global agricultural supply and demand estimate is due soon, and traders will use it to reassess US and global cotton balances, weighing the Northern Hemisphere harvest against recent price weakness. Volatility typically widens around the release, a real risk for mills locking in forward cotton costs.
By region, clusters dominated by chemical fiber fabrics, such as Keqiao and Shengze, are less sensitive to the cotton rebound, though blended products are affected. Nantong home textiles and Shandong-based spinning hubs, which consume more cotton yarn, absorb the raw-material pass-through more directly. Buyers need to distinguish their own category's exposure to cotton rather than broadly concluding that "cotton is up, so stock up."