Industry Trends: The overall health and outlook of the petrochemical industry greatly impacts demand and pricing for Formosa Plastics' products.

Economic Conditions: Global and regional economic growth influences the demand for plastic products used in manufacturing, construction, and consumer goods.

Raw Material Costs: Fluctuations in the price of key raw materials like ethylene and propylene directly affect production costs and profit margins.

Company Performance: Formosa Plastics' financial reports, including revenue, profit, and production volume, shape investor confidence.

Regulatory Environment: Changes in environmental regulations and trade policies can affect production costs and market access.

Market Sentiment: Investor perception and speculation concerning the company and the industry as a whole influence trading activity.

Global Events: Geopolitical events and unforeseen disruptions such as natural disasters can affect supply chains and market stability.

Competition: The actions of competitors in the petrochemical industry impact Formosa Plastics' market share and pricing strategies.