Ethylene glycol has emerged as the standout performer in the polyester chain, with its main contract surging over 4% in a single day to close at 4,650 yuan per ton. This rally is not merely sentiment-driven but reflects a convergence of multiple supply-demand variables within a specific time window. For upstream textile professionals, understanding the underlying logic of this price movement is more critical than chasing gains.
Low Inventories and Tight Supply
Ethylene glycol inventories at East China's major ports have declined for several consecutive weeks, now at their lowest level for the same period in five years. Tight spot availability has strengthened the cash basis, with spot prices commanding a significant premium over futures, providing solid support for near-month contracts. On the supply side, overseas plant loads remain at multi-year lows, particularly with Saudi facilities yet to restart, and cargo flows through the Strait of Hormuz are disrupted. Domestically, June and July mark the peak maintenance season for ethylene glycol plants, with both oil-based and coal-based units seeing synchronized operating rate declines. As of the week ending July 9, the domestic operating rate fell to 53.27%, down 3.41% month-on-month and hitting a year-to-date low. Concentrated maintenance at integrated ethylene-based plants further compresses output.
Geopolitical Risks Amplify Supply Uncertainty
Recent shifts in the US-Iran ceasefire agreement and the renewed closure of the Strait of Hormuz have reignited concerns over chemical supply. Earlier, easing geopolitical tensions and improved Strait navigation had triggered a sharp price correction. However, the Strait issue remains in a tug-of-war phase, with shipping data showing only moderate traffic levels, and some vessels rerouting to Southeast Asian markets. The number of ethylene glycol cargoes arriving in China remains limited. Helped by fresh conflicts in the Middle East over the weekend, prices staged a strong rebound. This linkage between geopolitics and chemical supply is unlikely to be offset by other factors in the near term.
Weak Downstream Demand and Inventory Pressure
In contrast to the upstream heat, the downstream polyester sector is in its traditional off-season. Overall operating rates remain at a neutral level, but there is divergence among filament, staple fiber, and bottle-grade chip operations. Polyester plant processing margins are under sustained pressure, weaving orders are insufficient, and loom operating rates in Jiangsu and Zhejiang remain low. Terminal textile demand has not seen a substantive recovery, and downstream players lack the incentive for large-scale restocking, mostly adopting a cautious hand-to-mouth procurement strategy. Polyester plants maintain current operating rates mainly to preserve cash flow, not because of improving end demand. This means the ethylene glycol rally is driven purely by supply contraction and inventory drawdowns, not demand pull.
Short-Term Rally vs. Medium-Term Headwinds
Analysts at Baocheng Futures believe the current price increase reflects a concentrated realization of near-term bullish factors, leaving deferred-month contracts under greater pressure. In the short term, domestic ethylene glycol futures may maintain a stabilizing-to-rebound trend, but medium-term prospects remain challenged. For textile chain enterprises, this means distinguishing the nature of the rally: near-month contracts are supported by inventories and geopolitics, while deferred months face headwinds from post-maintenance resumption, potential overseas supply recovery, and ongoing demand weakness.