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NEW YORK ( TheStreet) -- Westlake Chemical Corporation (NYSE: WLK) hit a new 52-week high Monday as it is currently trading at $67.18, above its previous 52-week high of $66.92 with 84,783 shares traded as of 10:05 a.m. ET. Average volume has been 570,200 shares over the past 30 days. Westlake Chemical has a market cap of $4.27 billion and is part of the basic materials sector and chemicals industry. Shares are up 47.7% year to date as of the close of trading on Friday. Westlake Chemical Corporation manufactures and markets basic chemicals, vinyls, polymers, and fabricated building products. It operates in two segments, Olefins and Vinyls. The company has a P/E ratio of 14.5, below the average chemicals industry P/E ratio of 16.4 and below the S&P 500 P/E ratio of 17.7.