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NEW YORK ( TheStreet) -- Quest Diagnostics (NYSE: DGX) hit a new 52-week high Thursday as it is currently trading at $62.39, above its previous 52-week high of $62.32 with 1.1 million shares traded as of 11:05 a.m. ET. Average volume has been 1.1 million shares over the past 30 days. Quest has a market cap of $9.62 billion and is part of the health care sector and health services industry. Shares are up 4.5% year to date as of the close of trading on Wednesday. Quest Diagnostics Incorporated provides diagnostic testing, information, and services in the United States and internationally. The company has a P/E ratio of 14.3, equal to the average health services industry P/E ratio and below the S&P 500 P/E ratio of 17.7.