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NEW YORK ( TheStreet) -- Arch Coal Inc (NYSE: ACI) hit a new 52-week low Monday as it is currently trading at $13.48, below its previous 52-week low of $14.28 with 907,297 shares traded as of 9:35 a.m. ET. Average volume has been 6.7 million shares over the past 30 days. Arch Coal has a market cap of $3.3 billion and is part of the basic materials sector and metals & mining industry. Shares are down 58.4% year to date as of the close of trading on Friday. Arch Coal, Inc. The company has a P/E ratio of 16, above the average metals & mining industry P/E ratio of 15.7 and below the S&P 500 P/E ratio of 17.7.