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NEW YORK ( TheStreet) -- Aetna (NYSE: AET) hit a new 52-week high Wednesday as it is currently trading at $64.35, above its previous 52-week high of $64.22 with 1.6 million shares traded as of 2:20 p.m. ET. Average volume has been three million shares over the past 30 days. Aetna has a market cap of $20.62 billion and is part of the health care sector and health services industry. Shares are up 36.6% year to date as of the close of trading on Tuesday. Aetna Inc. operates as a diversified health care benefits company in the United States. The company operates in three segments: Health Care, Group Insurance, and Large Case Pensions.