NEW YORK ( TheStreet) -TheStreet Ratings' stock model upgraded Hecla Mining ( HL) to 'Buy' from 'Hold'. Net income at this $2.5 billion market cap, precious metals company grew by 98.5% to a profit of $43.4 million compared to in the prior first quarter.

TheStreet Ratings released rating changes on 27 U.S. common stocks for May 9, 2011. In total, 16 stocks were upgraded and 11 stocks were downgraded by our stock model.

In the first quarter, Hecla Mining reported $136 million in revenue, an increase of 70.7% compared to the year earlier quarter. Learn more about Hecla Mining: Company Profile, Income Statement, Balance Sheet, Stock Ratios, Analyst Ratings.

$546 million market cap, fragrance company, Inter Parfums ( IPAR) was upgraded by our stock model to 'Buy' from 'Hold'. In first quarter results, Inter Parfums net profit of $12.8 million, up by 94.8% compared to the year earlier quarter. Over the same time period, revenue gained 11.7% to $133 million. Learn more about Inter Parfums: 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.