NEW YORK ( TheStreet) -TheStreet Ratings' stock model upgraded Morgan Stanley ( MS) to 'Buy' from 'Hold'. Net income at this $40.3 billion market cap, financial holding company grew by 35.5% to a profit of $836 million compared to the prior fourth quarter.

TheStreet Ratings released rating changes on 13 U.S. common stocks for April 11, 2011. In total, 13 stocks were upgraded and no stocks were downgraded by our stock model.

In the fourth quarter, Morgan Stanley reported $8.9 billion in revenue, an increase of 14.9% compared to the year earlier quarter. Learn more about Morgan Stanley: Company Profile, Income Statement, Balance Sheet, Stock Ratios, Analyst Ratings.

$6.0 billion market cap, industrial sensor company, Sensata Technologies Hldg NV ( ST) was upgraded to 'Buy' from 'Hold'. In fourth quarter results, Sensata Technologies Hldg NV reported a net income of $68.6 million, up 392% compared to the year earlier quarter. Over the same time period, revenue increased by 14.7% to $388 million. Learn more about Sensata Technologies: 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 equity and mutual fund ratings. 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.