China Polyester Filament Prices Collapse in Mid-June as Costs Plummet

China's polyester filament market faced a volatile U-turn in mid-June 2026. After early-week highs driven by restocking, prices collapsed by the weekend. Easing Middle East tensions dragged Brent crude down, prompting upstream PTA and MEG to plummet by 400-500 RMB/ton. This cost crash froze downstream buying, dropping production-to-sales ratios to 40%. Despite leading manufacturers cutting output to manage inventory, sluggish seasonal textile demand suggests prices will remain suppressed.