NEW YORK ( TheStreet) -TheStreet Ratings' stock model upgraded Robert Half Intl Inc ( RHI) to 'Buy' from 'Hold'. Net income at this $4.7 billion market cap, staffing company jumped 83.2% to $24.8 million in the fourth quarter compared to the year earlier quarter.

TheStreet Ratings released rating changes on 16 U.S. common stocks for January 26, 2011. In total, 10 stocks were upgraded and six stocks were downgraded by our stock model.

In the fourth quarter, Robert Half Intl reported $851.6 million in revenue, an increase of 15.5% compared to the year earlier quarter. Learn more about Robert Half Intl: Company Profile, Income Statement, Balance Sheet, Stock Ratios, Analyst Ratings.

$81.0 million market cap, concrete supplier, China Advanced Construction Materials Group ( CADC) was upgraded to 'Buy' from 'Hold'. In fiscal first quarter results, China Advanced Construction Materials Group turned in a profit of $3.3 million compared to a loss of $4.5 million in the year earlier quarter. Over the same time period, revenue grew by 58.9% to $31 million. Learn more about China Advanced Construction Materials Group: 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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