The commodity monitoring data on August 28 reveals a telling signal: raw silk jumped 2.67% in a single day, while PTA and cotton rose 0.59% and 0.51% respectively, but the other dozen chemical fiber products remained flat. This pattern of 'few rising, most sideways' is uncommon on the eve of the peak season. It suggests that upward momentum in upstream raw materials is building, yet midstream processing is still digesting earlier costs and has not formed a comprehensive follow-through rise.
The Logic Behind the Divergence
Looking at the gainers, raw silk was quoted at 427,500 yuan/ton, up 11,100 yuan from the previous day, but still 9.16% lower year-on-year, indicating a rebound from oversold levels after earlier loose cocoon supply. PTA at 6,213.25 yuan/ton, up 26.54% year-on-year, reflects stronger crude oil and PX costs. Cotton at 18,263.83 yuan/ton, up 19.12% year-on-year, is linked to global production cut expectations and high opening prices for new cotton. Notably, acrylonitrile has risen 44.12% year-on-year but stayed flat on the day, suggesting a temporary balance at high levels.
From a year-on-year perspective, chemical fiber chain raw materials have risen more than yarns. Polyester staple fiber is up 17.93% while polyester yarn only 5.90%; nylon POY up 21.37% while nylon DTY only 16.90%. This scissors gap means spinning margins are being squeezed. For mills focused on chemical fiber yarns, processing profits per ton may already be several hundred yuan narrower than a year ago.
Transmission Lag and Resistance
Why hasn't the raw material price increase been transmitted to yarns? On one hand, downstream weaving and garment orders have not yet entered a concentrated placement period, lacking demand-side momentum. On the other hand, some large spinning mills have low-cost raw material inventories and are not in a hurry to adjust prices, preferring to capture market share with stable prices. This game has kept cotton yarn 21S and 32S prices flat, with year-on-year gains of only 5.89% and 5.63%, far below cotton's 19.12%.
For buyers, this means the current window is ideal for locking in yarn prices—raw materials are showing upward signs, but yarn prices have not fully reacted. Once new cotton prices rise further or PTA continues upward with crude oil, yarns will likely follow. Historical experience suggests a 2-4 week lag, and with the traditional 'golden September and silver October' stocking season approaching, demand-side activation could amplify price elasticity.
Differential Responses Across Industrial Clusters
Different industrial clusters are affected differently. In Shengze, a chemical fiber hub, polyester filament prices are flat but year-on-year gains exceed 20%, squeezing local weavers between high raw material costs and sluggish greige fabric prices, potentially pressuring operating rates. In Nantong, a home textile hub, reliance on cotton yarn and polyester staple fiber means moderate raw material increases have a manageable cost impact, but if cotton continues to rise, pricing strategies for autumn/winter home textiles will need adjustment.
Traders in Keqiao are more focused on PTA and polyester staple fiber trends. PTA's 26.54% year-on-year rise implies contract prices from suppliers like Sinopec and Hengli will likely increase, directly pressuring polyester plants. However, with polyester staple fiber up 17.93% but polyester yarn only 5.90%, margins in staple fiber processing are severely squeezed, and some small plants may cut output or shift to differentiated products.
Practical Recommendations
For Buyers - Closely monitor raw silk and cotton futures; if raw silk rises over 1% for two consecutive days, consider locking in long-term orders to avoid secondary price increases. - Chemical fiber yarn prices are relatively stable now; it is advisable to lock in prices for part of Q4 orders before mid-September to hedge against potential PTA and acrylonitrile upside.
For Foreign Trade Companies - Include raw material price fluctuation clauses in export contracts, especially for long-term clients, e.g., sharing cost increases over 5%. - Watch the combined effect of RMB exchange rate and raw material prices; if raw materials rise and the currency appreciates, export profits will be doubly squeezed—adjust quotes accordingly.
The data is just a snapshot, but it reveals an imbalance in profit distribution along the chain. In a phase where raw materials surge and finished products stay flat, those who see the transmission path clearly will gain the upper hand at the negotiating table. Industry players should use this data as a reference for the next two weeks.