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NEW YORK ( TheStreet) -- Nstar (NYSE: NST) hit a new 52-week high Tuesday as it is currently trading at $48.87, above its previous 52-week high of $48.66 with 144,998 shares traded as of 3:30 p.m. ET. Average volume has been 364,500 shares over the past 30 days. Nstar has a market cap of $4.63 billion and is part of the utilities sector and utilities industry. Shares are up 3.5% year to date as of the close of trading on Monday. NSTAR, through its subsidiaries, engages in sale, distribution, and transmission of electricity and natural gas to commercial, industrial, and residential customers in Massachusetts. The company has a P/E ratio of 18.6, above the average utilities industry P/E ratio of 17.7 and above the S&P 500 P/E ratio of 17.7.