NEW YORK ( TheStreet) -TheStreet Ratings' stock model upgraded MedAssets Inc ( MDAS) to 'Buy' from 'Hold'. Revenues at this $1.1 billion market cap, healthcare technology company rose by 16.3% in the third quarter compared to the same quarter last year.

TheStreet Ratings released rating changes on 19 U.S. common stocks for December 13, 2010. In total, 17 stocks were upgraded and two stocks were downgraded by our stock model.

In the third quarter, MedAssets reported $8.5 million in net income, a 43.5% increase compared to the year earlier quarter. Learn more about MedAssets: Company Profile, Income Statement, Balance Sheet, Stock Ratios, Analyst Ratings.

$1.7 billion market cap, media marketing company, Valassis Communications ( VCI) was upgraded to 'Buy' from 'Hold'. In fiscal third quarter results, Valassis Communications reported a 5.2% increase in revenues to $572.4 million. Valassis Communications net income jumped 95.5% to $27.0 million from the same quarter last year. Learn more about Valassis Communications: 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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