NEW YORK ( TheStreet) -- Great Northern Iron Ore Properties ( GNI), IAMGOLD ( IAG) and ArcelorMittal ( MT) outperformed other stocks past week, while Mines Management ( MGN), James River Coal ( JRCC) and Alpha Natural Resources ( ANR) eroded a significant portion from their stock value.

Great Northern Iron Ore Properties emerged a top gainer last week increasing 6.2%. The company is considered to have one of the highest dividend yields, currently trading at 12.01%. IAMGOLD followed gaining 5.4% last week, after entering into a private placement agreement of approximately $1.2 million with Dios Exploration for a future joint venture and for acquiring a 60% interest in Dios's Shipshaw Project. Moreover, IAMGOLD announced record fourth quarter gold production of over 310,000 ounces. The company said 2010 gold production is at the upper end of its guidance range of 940,000 to 970,000 ounces, while cash cost is well within $565 to $585 per ounce.

ArcelorMittal edged up 2% last week after receiving analysts' upgrades. Last week, the steel giant announced that its steel plant in Georgetown, which was shut down following erosion in steel demand, will restart operations within a few weeks. However, industrial analysts are skeptical about the reopening of the plant. In a separate development, Brazil-based White Martins, a subsidiary of Praxair ( PX), has signed an agreement with ArcelorMittal to supply oxygen to the latter's steel production facility in southeast Brazil.

As per Global Industry Analysts report, the global aluminum market is all set to breach the 52 million tonnes mark by 2015. Meanwhile, United Company Rusal sees global aluminum demand growing by 8% in 2011, with China accounting for almost 12% of consumption. Besides, aluminum demand by global aircraft manufacturers is seen growing at 15%, with China accounting for a major portion.

Aluminum Corporation of China (Chinalco) ( ACH) rose 1.6% last week, after reporting profitable 2010 results. The company recorded a profit of $410 million in 2010, compared to a record loss in 2009, driven by revenue increases and drop in administrative expenses. For 2010, revenue increased almost 41%, compared to the prior year. Additionally, Rio Tinto ( RIO) and ACH are finalizing a joint venture in China with Chinalco holding 51% and Rio Tinto controlling a 49% stake. HSBC has upgraded the stock to overweight from its earlier neutral rating.

Aluminum company Alcoa ( AA) edged up 0.3% last week, after declaring a common and preferred stock dividend. The company recently agreed to partner and work with China Power Investment for $7.5 billion worth of clean-energy and smelting projects, as China strives to reduce its carbon footprint and cut energy costs.

Carpenter Technology ( CRS) gained 1.2% after announcing an 18 cents per share quarterly cash dividend, payable March 3, 2011. However, the gains were capped after research analysts at Sidoti downgraded the stock's rating to neutral from the earlier buy.

Mines Management was the top loser last week, down 18%. James River Coal slumped 16.7% after Zacks Investment Research rated the company a top sell pick. Alpha Natural Resources fell 13.7% after the Environmental Protection Agency of the U.S. said it is revoking a permit given to Alpha to employ mountaintop removal to extract coal from its Spruce No. 1 mine in West Virginia.

Last Week, coal companies snapped its rally on concerns that China would hike interest rates. Additionally, a Goldman Sachs analyst warned investors last week that the rally in coal stocks is short-lived and downgraded ratings.

International Coal Group ( ICO) and Walter Energy ( WLT) were the other decliners, down 13% and 12.7%, respectively. Analysts at FBR Capital Markets downgraded Walter's rating to market perform from the earlier outperform. Patriot Coal ( PCX) slumped 12.5% after receiving a downgrade to market perform from outperform from FBR Capital Markets. Arch Coal ( ACI) dropped 10.9%. Goldman Sachs downgraded the stock's rating to sell from neutral last week.

Other major coal companies such as Peabody Energy ( BTU), Massey Energy ( MEE) and Consol Energy ( CNX) declined 8.9%, 8.2% and 7.1%, respectively.

Meanwhile, as spot silver and gold prices dropped almost 3% and 1.5% last week, respectively. Following the metal prices, gold stocks such as New Gold ( NGD), US Gold ( UXG) and Goldcorp ( GG) were down 15.4%, 13.7% and 4.3%, respectively, while silver companies like Mag Silver ( MVG) and Endeavour Silver ( EXK) dipped 9.9% each. Pan American Silver ( PAAS) and Silver Wheaton ( SLW) fell 9.4% and 5.9%, respectively.
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