24/7 Wall St.

Investors and traders are often on the hunt for new research ideas that will generate higher income or more profits. 24/7 Wall St. reviews many analyst research calls from Wall Street brokerage and research firms to find great ideas in value stocks, growth stocks and dividend stocks. Some are stocks to buy, but some ideas are actually stocks that Wall Street thinks it is time to sell. These are 10 of the top analyst upgrades, downgrades and initiations seen from select Wall Street research calls this Tuesday.

Bankrate Inc. (NYSE: RATE) was upgraded to Buy from Neutral at BofA/Merrill Lynch.

Corporate Office Properties Trust (NYSE: OFC) was downgraded to Neutral from Outperform at R.W. Baird.

D.R. Horton Inc. (NYSE: DHI) was downgraded to Underperform from Market Perform at Raymond James.

Nasdaq OMX Group (NASDAQ: NDAQ) was downgraded to Sell from an already cautious Neutral rating, and the target was cut to $28 from $30, by Goldman Sachs.

PulteGroup Inc. (NYSE: PHM) and Ryland Group Inc. (NYSE: RYL) were both upgraded to Buy from Neutral at UBS, however Pulte was downgraded to Market Perform from Outperform at Raymond James.

SanDisk Corp. (NASDAQ: SNDK) was downgraded to Neutral from Buy at Goldman Sachs.

Sohu.com Inc. (NASDAQ: SOHU) was downgraded to Equal Weight from Overweight at Morgan Stanley.

Spirit Airlines Inc. (NASDAQ: SAVE) was downgraded to Neutral from Buy at Citigroup.

Starbucks Corp. (NASDAQ: SBUX) was reiterated Buy and the target was raised $7 to $84 at Argus.

Teva Pharmaceutical Industries Ltd. (NYSE: TEVA) was downgraded to Sell from an already cautious Neutral rating, and the price target was cut to $40 from $41 at Goldman Sachs.

UBS has issued a list of stocks to buy to benefit from the new global economy of the future.