Polystyrene prices in the U.S. increased from late February into early March 2026, supported by stronger styrene feedstock costs and rising weekly trading activity. While February demand remained steady, buyers largely maintained routine purchases rather than aggressive restocking, and export activity to markets such as Mexico and Colombia stayed limited due to sufficient inventories. Domestic supply remained balanced with steady Gulf Coast production and comfortable terminal stocks. In early March, prices rose sharply, driven by firmer styrene benchmarks and geopolitical tensions affecting freight and feedstock costs. Ongoing Middle East conflict and crude-linked volatility are expected to continue influencing market sentiment.
