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NEW YORK ( TheStreet) -- White Mountains Insurance Group (NYSE: WTM) hit a new 52-week high Friday as it is currently trading at $529.47, above its previous 52-week high of $527.98 with 8,246 shares traded as of 1:39 p.m. ET. Average volume has been 12,600 shares over the past 30 days. White Mountains Insurance Group has a market cap of $3.44 billion and is part of the financial sector and insurance industry. Shares are up 15.3% year to date as of the close of trading on Thursday. White Mountains Insurance Group, Ltd., through its subsidiaries, engages in the property and casualty insurance, and reinsurance businesses. It operates in three segments: OneBeacon, Sirius Group, and Other Operations. The company has a P/E ratio of 33.3, above the average insurance industry P/E ratio of 5.3 and above the S&P 500 P/E ratio of 17.7.