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NEW YORK ( TheStreet) -- White Mountains Insurance Group (NYSE: WTM) hit a new 52-week high Thursday as it is currently trading at $477.83, above its previous 52-week high of $477.75 with 7,509 shares traded as of 3:49 p.m. ET. Average volume has been 11,800 shares over the past 30 days. White Mountains Insurance Group has a market cap of $3.42 billion and is part of the financial sector and insurance industry. Shares are up 3.8% year to date as of the close of trading on Wednesday. White Mountains Insurance Group, Ltd., through its subsidiaries, engages in the property and casualty insurance, and reinsurance businesses. The company has a P/E ratio of 29.9, below the average insurance industry P/E ratio of 99.2 and above the S&P 500 P/E ratio of 17.7.