美国500强2012十大牛股

    虽然年中曾出现一轮抛盘，但美国股市今年总体表现强劲。截至12月月中，标准普尔500指数（S&P 500）上涨了近15%。

    《财富》美国500强公司今年也表现出色，几乎有80%的公司股价都呈现正增长，约60%实现了两位数的增长。《财富》美国500强公司2012年十大牛股中，有8家公司的股价实现了三位数的增长。

    十大牛股包括美国银行（Bank of America）和惠而浦（Whirlpool），这两家公司都得益于美国房地产市场的回升。很多炼油公司也取得了漂亮的涨幅。

    以下是《财富》美国500强2012年涨幅最大的十只股票（倒序排列），数据计算是根据12月7日的收盘价。

    Despite another mid-year sell-off, the stock market has logged a strong performance this year, with the S&P 500 up nearly 15% through mid-December.

    Fortune 500 companies have had a banner year too, with almost 80% of those companies posting gains. Roughly 60% have enjoyed double-digit percentage increases. And of the top 10 best performers among the Fortune 500 companies, eight have had triple-digit jumps.

    Among the best performers were Bank of America (BAC, Fortune 500) and Whirlpool(WHR, Fortune 500), which are benefiting from the rebound in the housing market. A number of oil refiners have also booked stellar gains.

    Click through to see the top 10 Fortune 500 performers (counting down from good to great), based on their closing prices as of Dec. 7.

第10名 马拉松原油公司

股票代码：MPC

今年迄今股价涨幅：88%

市值：213亿美元

《财富》美国500强排名：31

    马拉松原油公司（Marathon Petroleum）于2011年6月从马拉松石油公司（Marathon Oil）剥离出来，主营石油精炼、销售和运输。公司在伊利诺伊州、俄亥俄州、密歇根州、路易斯安娜州、肯塔基州和得克萨斯州都设有炼油厂。另外，公司在美国中东部拥有庞大的零售网络。

    迫于维权投资者Jana Partners的压力，马拉松原油现在已将管道业务剥离出去，MPLX LP于今年10月完成上市。自那以来，这家有限合伙公司的股价涨了41%。在Jana Partners的敦促下，马拉松原油公司也同意在2月份回购20亿美元的股票。

    这家原油公司还出资25亿美元收购了英国石油（BP）的得克萨斯城炼油厂，该厂2005年的一场爆炸事故曾造成15名工人死亡。该公司表示，这家炼油厂现在已经安全了。分析人士相信，这将给马拉松原油提供更多空间，在快速增长的墨西哥湾地区进行拓展。

    最大的问题是需求。假如经济放缓压低油价，马拉松原油公司的股票将在2013年遭遇冲击。

#10 Marathon Petroleum

Ticker: MPC

YTD stock performance: 88%

Market cap: $21.3 billion

Fortune 500 rank: 31

    Spun out of Marathon Oil (MRO,Fortune 500) in June 2011, Marathon Petroleum (MPC, Fortune 500)refines, markets, and transports oil through refineries in Illinois, Ohio, Michigan, Louisiana, Kentucky and Texas. The company also has a large retail presence in the Midwest.

    Under pressure from activist investor Jana Partners, Marathon Petroleum spun off its pipeline operations, taking MPLX LP (MPLX) public in October. Since then, shares of that limited partnership have increased 41%. At Jana Partners' urging, Marathon Petroleum agreed to buy back $2 billion worth of shares in February as well.

    The petroleum company also spent $2.5 billion to acquire BP's (BP) Texas City refinery, the site of a 2005 explosion that killed 15 workers. The company said the refinery is safe now, and analysts think it will give Marathon more room to expand in the growing Gulf Coast region.

    The biggest concern is demand. Should a slowing economy dampen oil prices, Marathon Petroleum could take a big hit in 2013.