PTA futures plunged over 2% on July 10, closing at 5,560 yuan per ton, leading the polyester chain lower. The direct trigger was the retreat in international oil prices and signs of cooling geopolitical speculation. However, the divergence within the industry is more noteworthy: MEG remained relatively strong, suggesting that the market is not uniformly bearish but rather repricing between weakening costs and industrial fundamentals.
PX Maintenance Season: The Anchor of Supply Contraction
PX accounts for over 90% of PTA production costs. The current centralized maintenance window for PX plants has seen multiple million-ton units, including those of Shenghong Refining, Hainan Refining, and Zhejiang Petrochemical, shut down consecutively, affecting over 9 million tons of capacity and resulting in monthly output losses of 800,000-900,000 tons. Industry operating rates have consequently dropped to 59.4%, with the overall Asian operating rate falling to 56.6%, the year's low. This supply contraction builds a price support line upstream.
For PTA producers, this means raw material costs are unlikely to collapse in the short term. Even if crude oil sees a phased correction, PX's low operating rates will buffer the speed of cost pass-through. For downstream buyers, this signals that PTA's floor support is much more solid than simply looking at oil prices.
PTA Inventories: A Three-Month Reversal from Peak to Trough
Starting in April, the domestic PTA industry launched an unprecedented wave of concentrated maintenance. Shutdowns and load reductions involved over 22 million tons of capacity, exceeding 20% of total domestic capacity. PTA daily capacity utilization once fell to around 60%, the lowest since October 2021. The scale of pending maintenance in June-July remains substantial, keeping utilization rates low.
As of early July, domestic PTA social inventories stood at 3.05 million tons, a cumulative drawdown of 1.4 million tons from the April peak. The destocking cycle has lasted three months, with absolute inventory levels below those of the same period in the past two years. Two variables need monitoring: whether the actual fulfillment rate of PTA plant maintenance will decline after processing fees recover to high levels, and the restart progress of already-shutdown units. If maintenance fulfillment remains high, inventories could decline further.
Demand Side: Restocking Expectations Amid Low Inventories
The current composite operating rate of the polyester industry is 80%, at a low level for the same period in recent years. But the more critical data comes from the end-use: raw material inventories at spinning and weaving mills are at near three-year lows. Starting in August, with the arrival of the peak autumn/winter order season, these mills will inevitably restock, driving up polyester industry operating rates.
Although overseas textile and apparel demand is generally weak, domestic seasonal restocking is sufficient to absorb marginal supply increases, preventing a rapid shift to a loose supply-demand balance. This means the transmission logic along the chain from PTA to polyester to weaving will gradually shift from "cost-driven" to "demand-driven." For polyester plants, low raw material inventories imply limited bargaining power; for PTA suppliers, the start of downstream restocking will be a continuation, not an end, of the destocking process.
Short-Term Volatility vs. Medium-Term Logic
Geopolitical risks show signs of easing, commodity sentiment is weakening, and the industrial side lacks new actual drivers. East China PTA spot trading prices are expected to fluctuate in the 5,770-5,860 yuan per ton range. However, behind this price level lies the cost support from PX maintenance and the supply constraints from PTA destocking.
For market participants, it is essential to distinguish between short-term sentiment fluctuations and medium-term fundamental trends. A phased retreat in oil prices will not change the fact of low PX operating rates, and the cooling of geopolitical speculation will not alter the reality of low downstream inventories. Once the August restocking window opens, the supply-demand balance of the polyester chain will face a new test.