NEW YORK ( TheStreet) -TheStreet Ratings' stock model upgraded Philip Morris International ( PM) to 'Buy' from 'Hold'. Net income at this $113 billion market cap, tobacco company grew to $1.8 billion, a 15.1% increase over the prior fourth quarter.

TheStreet Ratings released rating changes on 14 U.S. common stocks for March 2, 2011. In total, six stocks were upgraded and eight stocks were downgraded by our stock model.

In the fourth quarter, Philip Morris International reported $7 billion in revenue, an increase of 4.8% compared to the year earlier quarter. Learn more about Philip Morris International: Company Profile, Income Statement, Balance Sheet, Stock Ratios, Analyst Ratings.

$789 million market cap, gold miner, Golden Star Resources Ltd ( GSS) was downgraded to 'Sell' from 'Hold'. In fourth quarter results, Golden Star Resources Ltd reported a net loss of $18.0 million compared to a profit of $19.6 million in the year earlier quarter. Over the same time period, revenue shrank by 10.1% to $105 million. Learn more about Golden Star Resources Ltd: Company Profile, Income Statement, Balance Sheet, Stock Ratios, Analyst Ratings.

-- Reported by Kevin Baker in Jupiter, FL.

For additional Investment Research check out our Ratings Research Center.
Kevin Baker became the senior financial analyst for TheStreet Ratings upon the August 2006 acquisition of Weiss Ratings by TheStreet.com, covering mutual funds. He joined the Weiss Group in 1997 as a banking and brokerage analyst. In 1999, he created the Weiss Group's first ratings to gauge the level of risk in U.S. equities. Baker received a B.S. degree in management from Rensselaer Polytechnic Institute and an M.B.A. with a finance specialization from Nova Southeastern University.

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