NEW YORK ( TheStreet) -TheStreet Ratings' stock model upgraded Sucampo Pharmaceuticals Inc ( SCMP) to 'Hold' from 'Sell'. Net income at this $156 million market cap, biopharmaceutical company flipped to a profit of $2.4 million from a loss of nearly $100 thousand in the third quarter compared to the same quarter last year.

TheStreet Ratings released rating changes on nine U.S. common stocks for December 23, 2010. In total, eight stocks were upgraded and one stock was downgraded by our stock model.

In the third quarter, Sucampo Pharmaceuticals reported $20.9 million in revenue, an increase of 17.3% over the year earlier quarter. Learn more about Sucampo Pharmaceuticals: Company Profile, Income Statement, Balance Sheet, Stock Ratios, Analyst Ratings.

$499 million market cap, commercial HVAC company, Comfort Systems USA ( FIX) was upgraded to 'Buy' from 'Hold'. In third quarter results, Comfort Systems USA reported a 43.7% decline in net income to $5.4 million on a 5.5% increase in revenue to $307.7 million when compared to the same quarter last year. Learn more about Comfort Systems USA: 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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