MOST NOTEWORTHY:

• Bear Stearns downgraded MedImmune Inc (NASDAQ: MEDI) to Peer Perform from Outperform based on limited upside over the next 6-12 months.

• Take-Two Interactive Software (Nasdaq: TTWO) was cut by Kaufman to Sell from Hold with a $17 target. Kaufman believes Take-Two is overvalued based on fundamentals.

• Tractor Supply (NASDAQ: TSCO) was downgraded by Matrix to Sell from Hold. The firm expects high livestock feed and fertilizer prices to cut demand for Tractor Supply's target customer base.

• Martin Midstream Partners LP (NASDAQ: MMLP) was downgraded to Sector Perform from Outperform based on valuation.

• Friedman Billings cut Opteum Inc (NYSE: OPX) to Underperform from Market Perform citing the mounting losses in sub-prime mortgage loans and notes that servicing rights are also under pressure.

• JP Morgan downgraded OMI Corp (NYSE: OMM) to Neutral from Overweight.

• Kaufman downgraded First Charter Corp (NASDAQ: FCTR) to Market Perform from Outperform, citing the macro environment for the downgrade.

• CIBC downgraded Saifun Semiconductors Ltd (NASDAQ: SFUN) to Sector Performer from Outperform after checks in Asia indicated that Hynix is no longer considering NROM as they believe SFUN's licensing momentum is diminishing.

Analyst downgrades 3-20-07: Medimmune Inc & Take-Two Interactive Software downgraded today originally appeared on BloggingStocks on Tue, 20 Mar 2007 11:02:00 EST. Please see our terms for use of feeds.