Investors frequently get to see the analyst upgrades and Buy ratings from Wall Street firms. What investors often do not get to see is when analyst downgrade stocks to sell or to avoid. 24/7 Wall St. reviews many fresh research calls each and every day to find great ideas from value stocks to growth stocks to dividend stocks, and we have broken out the negative analyst calls today. These are this Friday’s top analyst downgrades and cautious research notes from Wall Street.

Bank of America Corp. (NYSE: BAC) was started as Underperform at Macquarie.

Chemtura Corp. (NYSE: CHMT) was downgraded to Underperform from Perform at Oppenheimer.

Intel Corp. (NASDAQ: INTC) was downgraded to Underweight from Neutral at Piper Jaffray.

Isle of Capri Casinos Inc. (NASDAQ: ISLE) was downgraded to Sector Perform from Outperform at RBC.

Iron Mountain Inc. (NYSE: IRM) was downgraded to Hold from Buy at Stifel Nicolaus on IRS REIT decision delay.

J.P. Morgan Chase & Co. (NYSE: JPM) was downgraded to Neutral from outperform at Macquarie.

MannKind Corp. (NASDAQ: MNKD) was downgraded to Neutral from Buy at BofA/Merrill Lynch.

Mercadolibre Inc. (NASDAQ: MELI) was downgraded to Neutral from Overweight at J.P. Morgan.

Sprint Nextel Corp. (NYSE: S) was downgraded to Neutral from Buy at Nomura.

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