NEW YORK ( TheStreet) -TheStreet Ratings' stock model downgraded RLI Corp ( RLI) to 'Hold' from 'Buy'. Net income at this $1.1 billion market cap, property and casualty insurer contracted by 10% to $28 million in the third quarter compared to the year earlier quarter.

TheStreet Ratings released rating changes on five U.S. common stocks for January 12, 2011. In total, three stocks were upgraded and two stocks were downgraded by our stock model.

In the third quarter, RLI Corp reported $149.6 million in revenue, an increase of just 2.5% over the year earlier quarter. Learn more about RLI Corp: Company Profile, Income Statement, Balance Sheet, Stock Ratios, Analyst Ratings.

$47.3 million market cap, natural gas explorer, Tengasco Inc ( TGC) was upgraded to 'Hold' from 'Sell'. In third quarter results, Tengasco flipped to a profit of $0.2 million from a loss of $0.5 million in the year earlier quarter. Over the same period, revenue grew by 27.2% to $3.3 million. Learn more about Tengasco: 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, 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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