Investors and traders are usually on the lookout for new research ideas that will generate higher income or more profits. 24/7 Wall St. reviews many analyst research calls from Wall Street and from boutique firms to find great ideas in value stocks, growth stocks and dividend stocks. Some are stocks to buy, while some ideas are even stocks to sell. These are 10 of the top analyst upgrades, downgrade, and initiations from select Wall Street research calls this Tuesday.

Best Buy Co. Inc. (NYSE: BBY) was raised to Buy from Hold at Deutsche Bank.

Boardwalk Pipeline Partners L.P. (NYSE: BWP) was raised to Neutral from Underperform at Credit Suisse.

Buffalo Wild Wings Inc. (NASDAQ: BWLD) was downgraded to Hold from Buy at KeyBanc.

CenterPoint Energy Inc. (NYSE: CNP) was initiated with a Buy rating at KeyBanc.

Deutsche Bank A.G. (NYSE: DB) was raised to Neutral from Underperform at Credit Suisse and raised to Overweight from Neutral at J.P. Morgan.

Pandora Media Inc. (NYSE: P) was initiated with a Sector Perform rating at RBC Capital Markets.

PulteGroup Inc. (NYSE: PHM) was downgraded to Neutral from Overweight at J.P. Morgan.

Rosetta Resources Inc. (NASDAQ: ROSE) was reinstated as Outperform with a $62 price target at Credit Suisse.

SINA Corp. (NASDAQ: SINA) was raised to Buy from Hold at Jefferies.

Superior Energy Services Inc. (NYSE: SPN) was raised to Buy from Hold at Stern Agee.

Jefferies identified its top oil and gas stocks to buy amid the recent turmoil.

Read also: The Sell in May and Go Away 2013 Primer and Market Blueprint

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