NEW YORK ( TheStreet) -TheStreet Ratings' stock model upgraded Energy Services Of America ( ESA) to 'Buy' from 'Hold'. Net income at this $56 million market cap, energy infrastructure company flipped to a profit of $3.6 million in fiscal fourth quarter compared to a loss of $1.5 million in the same quarter last year.

TheStreet Ratings released rating changes on 10 U.S. common stocks for December 21, 2010. In total, seven stocks were upgraded and three stocks were downgraded by our stock model.

In the fourth quarter, Energy Services Of America reported $91.8 million in revenue, a leap of 213% over the year earlier quarter. Learn more about Energy Services Of America: Company Profile, Income Statement, Balance Sheet, Stock Ratios, Analyst Ratings.

$3.7 billion market cap, networking storage company, LSI Corp ( LSI) was upgraded to 'Buy' from 'Hold'. In third quarter results, LSI Corp reported an 8.7% increase in revenues to $629 million and a 55.4% decrease in net income to $23.4 million compared to the same quarter last year. Learn more about LSI Corp: Company Profile, Income Statement, Balance Sheet, Stock Ratios, Analyst Ratings.

-- Reported by Kevin Baker in Jupiter, FL.

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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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