NEW YORK (

TheStreet

) -TheStreet Ratings' stock model upgraded

Provident Energy

(PVX)

to 'Buy' from 'Hold'. Net income at this $2.4 billion market cap, liquefied natural gas company flipped to a profit of $61.3 million compared to a loss of $20.3 million in the prior fourth quarter.

TheStreet Ratings released rating changes on 10 U.S. common stocks for March 22, 2011. In total, four stocks were upgraded and six stocks were downgraded by our stock model.

In the fourth quarter, Provident Energy reported $544 million in revenue, an increase of 13.2% compared to the year earlier quarter. Learn more about Provident Energy:

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Income Statement

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Stock Ratios

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Analyst Ratings

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$545 million market cap, online realtor,

LoopNet Inc

(LOOP) - Get Report

was upgraded to 'Buy' from 'Hold'. In fourth quarter results, LoopNet net income jumped by 120% to a profit of $7.3 million when compared to the year earlier quarter. Over the same time period, revenue grew by 9.2% to $20 million. Learn more about LoopNet:

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Stock Ratios

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Analyst Ratings

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-- 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.