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NEW YORK ( TheStreet) -- Southwest Gas Corporation (NYSE: SWX) hit a new 52-week high Tuesday as it is currently trading at $44.49, above its previous 52-week high of $44.43 with 15,767 shares traded as of 10:30 a.m. ET. Average volume has been 189,600 shares over the past 30 days. Southwest Gas has a market cap of $2.04 billion and is part of the utilities sector and utilities industry. Shares are up 4% year to date as of the close of trading on Monday. Southwest Gas Corporation engages in the purchase, distribution, and transportation of natural gas in Arizona, Nevada, and California. As of February 28, 2012, it had 1,859,000 residential, commercial, and industrial customers. The company has a P/E ratio of 16.7, equal to the average utilities industry P/E ratio and below the S&P 500 P/E ratio of 17.7.