Oil Slump Weighs on Polyester Costs, ICE Cotton Rises: What's the Market Betting On?

On August 3, ICE cotton futures closed higher despite a sharp drop in oil prices, with the December contract settling at 82.57 cents/lb, up 0.95%. This divergence is noteworthy: lower oil prices typically pressure cotton through reduced polyester costs, but the market chose to rally, indicating that supply-side factors are now dominating pricing.

Event Background

The oil market experienced sharp volatility, with Brent crude falling about 7% intraday to a three-week low. Geopolitical tensions eased as the US postponed military action against Iran, raising expectations of increased Gulf oil supply. For the textile chain, oil prices directly affect polyester staple fiber costs; a 1% drop in oil typically reduces polyester costs by about 0.5%, potentially widening the cotton-polyester spread and prompting mills to adjust fiber ratios.

However, cotton futures did not follow oil lower, instead closing higher after being under pressure for most of the session. A StoneX risk advisor noted that the market had seen a strong rally late last week and was correcting from highs, but fund flows did not show panic. CFTC data showed speculative net longs decreased by 2,295 lots to 70,542 lots in the week ending July 28, a limited decline, with funds still holding significant net long positions. The weekly uptrend remains intact.

Industry Impact

Export data is the core support for cotton prices. USDA's weekly export sales report showed net sales of 352,400 bales of upland cotton for the next marketing year in the week ending July 23, a sharp increase from 16,100 bales the prior week, more than a 20-fold jump. This reflects strong overseas demand for US cotton, especially amid global supply chain restructuring, as buyers prefer to lock in supplies early. For Chinese importers, strong US export sales imply tighter arrivals later, potentially reducing bargaining space.

Inventory and crop conditions have intensified supply concerns. ICE deliverable stocks fell to 87,606 bales as of July 31, down 3,093 bales from the previous session, indicating robust physical delivery demand. More concerning, USDA's crop progress report showed US cotton condition at 42% good-to-excellent as of August 2, down 4 percentage points from the prior week and well below 55% a year ago. Condition ratings are a leading indicator for yield; historically, a 5-point drop can reduce yields by 2-3%, implying significant downside risk to 2026/27 US production.

For textile mills, the linkage between cotton and polyester costs is shifting. In the short term, lower oil prices may encourage some mills to increase polyester usage. But in the medium term, if US production expectations deteriorate further, cotton price upside will outweigh the drag from lower polyester costs. The Cotlook A index rose 280 points to 92.80 cents/lb, confirming firm cash market demand for high-grade cotton.

Practical Advice

For Buyers - Monitor weekly US crop condition changes; if it falls below 40% for two consecutive weeks, consider locking in forward orders early to avoid price spikes. - Use the current window before the cotton-polyester spread widens excessively to evaluate blend ratio adjustments, but allow buffer time for fiber switching. - Track ICE stock levels closely; if stocks fall below 80,000 bales, near-month contracts may experience short squeezes, so avoid volatile delivery months for physical purchases.

For Exporters - Strong US export sales indicate overseas restocking demand; consider raising US cotton basis quotes, but hedge currency fluctuations. - With low oil prices, polyester fabric margins may expand; develop cotton-polyester blended product lines to cater to diverse customer needs. - Establish a monitoring model linking oil, polyester, and cotton prices; when Brent crude falls more than 3% in a week, adjust quotes promptly to avoid cost transmission lags.