NEW YORK ( TheStreet) -- Mines Management (MGN - Get Report), Great Northern Iron Ore Properties (GNI) and New Gold (NGD - Get Report) headed the gainers' list last week, while Alpha Natural Resources (ANR - Get Report), International Coal (ICO), and Walter Energy (WLT - Get Report) were the top losers last week.Mines Management was the top advancer last week, gaining around 20.2% after filing a technical report in support of the Preliminary Economic Assessment for its Montanore Silver-Copper project in Montana.
Metals and Mining: Winners and Losers
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