Investors and traders seem to be constantly looking for fresh research ideas that will lead to higher income or more profits. 24/7 Wall St. reviews many fresh research calls each morning to find great ideas from value stocks to growth stocks to dividend stocks. We are breaking out the positive analyst calls as far as stocks to buy and positive research calls today. These are some of this Tuesday’s top analyst upgrades, initiations and positive analyst research calls seen from Wall Street today.

Aetna Inc. (NYSE: AET) was reinstated as Buy at Goldman Sachs.

American Tower Corp. (NYSE: AMT) was raised to Outperform from Neutral at Macquarie.

BlackRock Inc. (NYSE: BLK) was raised to Outperform from Neutral at Macquarie.

Cray Inc. (NASDAQ: CRAY) was started as Buy with $25 price target at Stern Agee.

Cubist Pharmaceuticals Inc. (NASDAQ: CBST) was raised to Hold from Sell at Cantor Fitzgerald.

Hasbro Inc. (NASDAQ: HAS) started as Overweight at Piper Jaffray.

IntercontinentalExchange Inc. (NYSE: ICE) was raised to Outperform from Neutral at Macquarie.

LeapFrog Enterprises Inc. (NYSE: LF) was started as Overweight at Piper Jaffray.

Mattel Inc. (NASDAQ: MAT) started as Overweight at Piper Jaffray.

Sony Corp. (NYSE: SNE) was started as Buy at Jefferies.

Stifel Financial Corp. (NYSE: SF) was raised to Market Perform from Underperform at Wells Fargo.

Goldman Sachs has raised its 2013 S&P 500 price target to 1,750 from 1,625, and it raised the S&P 500 price target for 2014 to 1,900 from 1,775.

See also: Merrill Lynch Recommends Specialty Metals and Mining Stocks to Buy

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