MOST NOTEWORTHY:

• Citigroup upgraded ABN Amro Holding NV (NYSE: ABN) to Hold from Sell as the firm believes value can be realized by breaking the company up and selling units to top bidders.

• UBS upgraded both Werner Enterprises (NASDAQ: WERN) and Affiliated Computer Services to Neutral from Reduce, based on valuation.

• Express Scripts (NASDAQ: ESRX) was upgraded to Outperform from Market Perform at Leerink Swann.

• JP Morgan upgraded Clorox Co (NYSE: CLX) to Overweight from Neutral.

• Bank of America upgraded shares of Tiffany & Co (NYSE: TIF) to Buy from Neutral with a $52 target. The firm believes Tiffany can improve profitability through better operations, efficiency and downside protection from the strong luxury cycle.

• Credit Suisse added Office Depot, Inc (NYSE: ODP) to its U.S. Focus List. The firm believes that Office Depot has the most attractive risk/reward profile in the industry and sees limited downside risk given recent weakness and reduced investor expectations.

• Kaufman upgraded Best Buy Co, Inc (NYSE: BBY) to Buy from Hold with a $59 target.

• Goldman Sachs upgraded Nvidia Corp (NASDAQ: NVDA) to Buy from Neutral with a $33 target, citing valuation.

• Lehman Brothers upgraded Cadbury Schweppes plc (NYSE: CSG) to Overweight from Equal Weight.

Analyst upgrades 3-21-07: Tiffany & Co, Best Buy & Office Depot all upgraded today originally appeared on BloggingStocks on Wed, 21 Mar 2007 11:01:00 EST. Please see our terms for use of feeds.