Westlake Chemical Corporation manufactures and markets basic chemicals, vinyls, polymers, and fabricated building products. It operates in two segments, Olefins and Vinyls. The Olefins segment provides ethylene, polyethylene, styrene monomer, and various ethylene co-products, such as chemical grade propylene, crude butadiene, pyrolysis gasoline, and hydrogen. The Vinyls segment offers polyvinyl chloride (PVC), vinyl chloride monomer, ethylene dichloride, chlorine, caustic soda, and ethylene. This segment also manufactures and sells products fabricated from PVC, including water, sewer, irrigation, and conduit pipes; window and door profiles; and fences. The company