NEW YORK ( TheStreet) -TheStreet Ratings' stock model upgraded Standard Motor Products ( SMP) to 'Buy' from 'Hold'. Net income at this $327 million market cap, auto parts company grew by 183% to a profit of $6.7 million compared to in the prior first quarter.

TheStreet Ratings released rating changes on 12 U.S. common stocks for May 10, 2011. In total, 11 stocks were upgraded and 1 stock was downgraded by our stock model.

In the first quarter, Standard Motor Products reported $220 million in revenue, an increase of 22.8% compared to the year earlier quarter. Learn more about Standard Motor Products: Company Profile, Income Statement, Balance Sheet, Stock Ratios, Analyst Ratings.

$1.8 billion market cap, pipeline & refinery company, Genesis Energy LP ( GEL) was upgraded by our stock model to 'Buy' from 'Hold'. In first quarter results, Genesis Energy LP net profit of $7.0 million, up by 2.1% compared to the year earlier quarter. Over the same time period, revenue gained 47.9% to $690 million. Learn more about Genesis Energy LP: 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 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.

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