NEW YORK ( TheStreet) -TheStreet Ratings' stock model upgraded ManTech Intl Corp ( MANT) to 'Buy' from 'Hold'. Net income at this $1.5 billion market cap, security technology company grew by 7.3% to $31.4 million in the third quarter compared to the year earlier quarter.

TheStreet Ratings released rating changes on nine U.S. common stocks for January 13, 2011. In total, seven stocks were upgraded and two stocks were downgraded by our stock model.

In the third quarter, ManTech Intl Corp reported $657 million in revenue, an increase of 27.7% over the year earlier quarter. Learn more about ManTech Intl Corp: Company Profile, Income Statement, Balance Sheet, Stock Ratios, Analyst Ratings.

$149 billion market cap, financial holding company, Bank of America Corp ( BAC) was upgraded to 'Hold' from 'Sell'. In third quarter results, Bank of America's loss increased to $7.3 billion from $1.0 billion on a 2.0% contraction in revenue to $32.5 billion when compared to the year earlier quarter. Learn more about Bank of America: 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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