On June 1, 2026, Brent crude surged over 4% in a single day, sending WTI back above $92 and triggering synchronized gains across the polyester chain—PX, PTA, and MEG. This was not a routine cost fluctuation but a clear signal of how the hard supply gap in global crude oil, caused by the blockage of the Strait of Hormuz, is now transmitting into the polyester sector. Compared to the moderate 3% volatility during the 2022 Russia-Ukraine conflict, the intensity and speed of this geopolitical shock are fundamentally different.
Two Conflicts, Two Shock Logics
The Russo-Ukrainian conflict and the US-Iran conflict represent two distinct types of disruption: regional energy disturbance versus global supply shock. The former hit Europe's energy system. Russia's crude oil accounts for less than 10% of China's imports, and China's polyester feedstock relies mainly on Middle East crude and PX. So the oil price rise was largely a cost spillover. Companies could buffer it by adjusting operating rates and drawing down inventories. Volatility was kept within 3%, and no feedstock shortages occurred.
The latter, however, directly severed the Strait of Hormuz—the chokepoint for 20% of global crude oil transit. During the conflict, daily transit volume through the strait plummeted to 35% of pre-war levels, creating a daily supply gap of 6-7 million barrels. China's MEG import dependency exceeds 20%, and the Middle East is the core production region for both PX and MEG. Feedstock imports were directly constrained, forcing some polyester plants to cut runs due to shortages.
Transmission Speed Defines Survival Room
During the Russia-Ukraine conflict, it took 1-2 weeks for polyester feedstock prices to follow crude oil upward, giving companies ample time to adjust strategies and pass on costs. In the US-Iran conflict, transmission was instantaneous: on the day the strait blockade news broke, Brent jumped 6.68%, PX hit the daily limit, PTA rose over 6%, and MEG locked limit-up. The entire chain—from crude to bottle-grade chips and staple fiber—was repriced within 24 hours. Companies had no buffer and had to absorb the cost shock passively.
This speed difference directly reshaped profit distribution. During the Russia-Ukraine phase, polyester chain profits contracted modestly but remained sustainable. Under the US-Iran scenario, profits concentrated sharply upstream. Downstream fabric mills faced a stark choice: panic-buy feedstock at inflated prices and risk high inventory costs, or halt operations and lose orders. Small and medium weaving mills came under severe pressure, creating a split market where upstream prices soared while downstream buyers froze.
Long-Term Impact: From Market Pricing to Geopolitical Pricing
The Russia-Ukraine conflict's lasting effect was mainly to reshape global crude trade flows and accelerate Europe's energy transition, but it did not alter the core supply-demand fundamentals of the polyester industry. Oil entered a high-range but not extreme volatility, and the industry eventually returned to market-driven pricing.
The US-Iran conflict, by contrast, has permanently rewritten the pricing logic of the polyester value chain. Geopolitical risk has become the anchor for oil prices. Brent crude is now firmly in the $95-115/barrel range, signaling the official arrival of a high-cost era. More critically, the persistent uncertainty over Hormuz transit means polyester feedstock imports face ongoing disruption risk. This structural damage is accelerating industry consolidation: cash-strapped, low-margin small players are being forced out, while resources flow to leading companies with feedstock security and scale advantages, rapidly raising market concentration.
Outlook and Actionable Advice
With the US-Iran standoff unresolved and the Hormuz transit risk remaining high, the polyester chain will stay under pressure from high costs and weak demand. In the short term, feedstock prices will remain elevated, downstream demand recovery will be sluggish, and profits will keep concentrating upstream, squeezing margins for small and medium producers.