Lead-in: This week, U.S.-Iran tensions shifted from confrontation to a phased de-escalation, leading to a rapid unwinding of the geopolitical risk premium. On November 1, Iran’s Foreign Minister disclosed a “two-day plan,” explicitly demanding that the U.S. first fulfill its commitments and lift relevant restrictions before opening the Strait of Hormuz, which serves as a prerequisite for restarting Iran-U.S. negotiations. On November 4, with the conclusion of the U.S. midterm elections and the Democrats’ regained control of Congress, market bets on a downgrade in U.S.-Iran tensions intensified, causing crude oil prices to drop by approximately 10% over the week. The collapse in costs propagated through the aromatics-polyester chain, with spot prices for naphtha, paraxylene (PX), and purified terephthalic acid (PTA) weakening simultaneously, followed by declines across polyester varieties. On the industrial front, PTA supply normalized and polyester operating rates edged up slightly, while downstream weaving utilization and sales volumes declined concurrently, leading to significant inventory accumulation in filament products. The supply-demand balance shifted from tight to loose. Amid weak costs and soft demand, industry chain prices fell overall this week. Processing margins and segment profits were passively repaired due to deeper raw material price drops, leaving the market oscillating between volatile news-driven sentiment and weak fundamental realities.
Core Logic:
Costs: U.S.-Iran dynamics have entered a new phase of "pressure-for-talks," with Iran linking the opening of the Strait to U.S. compliance. While uncertainties remain regarding the restart of negotiations, the market has already priced in the de-escalation scenario. Crude oil retraced previous geopolitical premiums, falling about 10% weekly. The cost collapse during Asian trading hours directly impacted commodity valuations. Naphtha prices fell by 4.32% month-over-month to $1,001/ton, and PX dropped by 4.13% to $1,282.3/ton. The PX spread (PXN) compressed to $281.27/ton, down 3.44%, indicating an overall downward shift in the cost center. Rising expectations for interest rate hikes also dampened demand prospects, turning the cost side from a support factor into a drag on the polyester chain. With unclear geopolitical guidance, volatility remains high.
Supply and Demand: On the supply side, PX operating rates declined to 84.44%, while PTA rates rose to 71.08%. The restart of previously maintained units established a direction of increasing supply; however, compressed processing margins may temporarily curb further increases in operating rates. On the demand side, polyester operating rates recovered to 74.39%, but filament sales ratios dropped to 29.20%, and the weighted polyester sales ratio stood at 27.46%. Downstream chemical fiber weaving utilization fell to 49.06%, characterized mainly by rigid demand procurement and a lack of active restocking. The combination of rising supply and weak demand, along with gradual inventory accumulation, continues to suppress price elasticity.
I. Industry Profit Distribution: Cost Center Shifts Downward; Polyester Segment Profits Passively Repaired
As of this week (October 30 – November 5, 2026), the unwinding of the geopolitical premium dominated the overall decline in industry chain prices. Spot prices for naphtha, PX, and PTA fell by 4.32%, 4.13%, and 3.60% respectively. Polyester products followed suit, with DTY/Polyester Filament, Staple Fiber, Bottle Grade PET, and Chip PET declining by 1.17%, 1.85%, 1.64%, and 2.40% respectively. Regarding profits, since raw material prices fell more sharply than finished polyester products, segment profits were passively repaired. PTA processing margins increased by 6.40% to 398.20 RMB/ton, though remaining at low levels. The PX spread decreased by 3.44% to $281.27/ton, indicating significant margin concession in the PX segment. In the polyester sector, cash flow profits for filament recovered to 266.72 RMB/ton, while bottle grade PET and chip PET reached 294.13 RMB/ton and 135.72 RMB/ton, respectively. Staple fiber remained in a loss position of 47.28 RMB/ton, making it the most pressured variety in the chain. Overall, this week's profit repair stemmed from cost concessions rather than demand improvement. Given declining sales and rising inventories, the sustainability of this recovery depends on production cuts and further downward movement in raw material prices.
II. Supply Environment: PTA Supply Recovers, PX Load Declines
This week, the supply side presented a divergent pattern of decreasing PX and increasing PTA. PX operating rates fell by 1.58 percentage points to 84.44%, while PTA rates rose by 2.07 percentage points to 71.08%. Despite scheduled maintenance at Baihong facilities and reduced loads at some units during the week, the restart of multiple previously maintained units led to an overall increase in supply. As industrial supply-demand imbalances and inventory accumulation gradually materialized, spot basis weakened continuously. This week and next, delivery contracts for January expiry at major ports traded at a premium of 400–420 RMB.
III. Demand Environment: Sales Volumes Retreat from Highs; Weakening Downstream and Inventory Accumulation Materialize
Demand clearly weakened this week. Filament sales ratios dropped from 54.54% to 29.20%, while staple fiber sales saw a slight rebound to 55.10%; overall activity was driven primarily by rigid demand. Downstream chemical fiber weaving utilization fell by 2.77 percentage points to 49.06%, reflecting sluggish order follow-through and diminished ability of the weaving sector to pass on raw material costs. Regarding inventories, POY, FDY, and DTY stocks rose to 18.9 days, 25.3 days, and 26.8 days, respectively, with filament facing the most significant accumulation pressure. Conversely, staple fiber equity inventories dropped to 5.25 days, and chip inventories fell to 2.12 days; this destocking resulted more from production cuts and low-price dumping than from genuine demand recovery. The parallel rise in polyester load and fall in sales ratios confirm that inventory accumulation expectations are materializing, and the negative feedback loop from the demand side on prices continues.
Comprehensive Outlook: Geopolitics remains the core variable in the short term. De-escalation in the Middle East is not instantaneous; after retracing premiums, crude oil shows signs of probing higher bottoms, shifting cost-side guidance from unilateral drag to high volatility. At the industrial level, the coexistence of recovering PTA supply, rising polyester loads, and weakening downstream weaving, alongside accelerating inventory accumulation, creates a scenario where weak macro conditions, weak costs, and weak industry fundamentals collectively restrain prices, lacking upward drivers. While oversold repairs may occur after digesting phased negatives, rebound heights will be capped by inventories and sales performance. Future focus should be on the pace of crude oil stabilization, unit adjustments under low PTA processing margins, and the enforcement intensity of polyester production cuts, while remaining wary of bidirectional volatility caused by fluctuating geopolitical news.
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