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Polystyrene prices in the USA moved higher as the market transitioned from February into early March, driven by a mix of firmer feedstock costs and a sudden uptick in weekly trading activity. Early February showed incremental gains before trading settled through the last weeks of the month, with buyers largely content to maintain regular offtake rather than carry out aggressive restocking. Meanwhile, exporters were subdued, leaving domestic suppliers to balance steady Gulf Coast production against comfortable terminal inventories. The net effect was a market that finished the February window with a cautious bias toward higher levels as geopolitical risks and feedstock trends began to weigh more heavily on margins.

Polystyrene demand varied across end-use sectors, keeping transactional activity uneven. Food-service packaging and appliance manufacturers held regular, early-year volumes, while construction-related insulation converters reported seasonally soft resin needs. In contrast, export distributors...